Pool Patchers

Federal & National Standards

CDC Model Aquatic Health Code, 5th Edition - Code

MAHC 5th Ed.Posted 2024-12-16290 inspection points
CDC MAHC 5th Ed. (2024) § 5.4.2.1.1 / .2.1.2

Preventive Maintenance Plan Available

A written comprehensive preventive maintenance plan for each AQUATIC VENUE shall be available at the AQUATIC FACILITY .

What we inspect

Written preventive maintenance plan required

We check that a written maintenance plan exists for the pool's equipment.

Must be: A written plan must be onsite detailing how often the pump, filter, and treatment equipment are inspected, maintained, and replaced.

If it fails: Write a maintenance schedule covering inspection, upkeep, and replacement of pool equipment.

CDC MAHC 5th Ed. (2024) § 5.4.2.1.1 / .2.1.2

The AQUATIC FACILITY preventive maintenance plan shall include details and frequency of owner/operator’s planned routine facility inspection, maintenance, and replacement of recirculation and water treatment components.
The owner shall ensure documents are maintained at the INDOOR AQUATIC FACILITY to be available for inspection, recording the following:

What we inspect

Air handling system records required (indoor)

We check whether the indoor facility keeps records of its air system's performance and maintenance.

Must be: Daily readings, maintenance dates, and any system changes should be logged and available for review.

CDC MAHC 5th Ed. (2024) § 5.6.2.10

1) A log recording the set points of operational parameters set during the commissioning of the AIR HANDLING SYSTEM and the actual readings taken at least once daily;
2) Maintenance conducted to the system including the dates of filter changes, cleaning, and repairs;
3) Dates and details of modifications to the AIR HANDLING SYSTEM; and
4) Dates and details of modifications to the operating scheme.
The AIR HANDLING SYSTEM shall operate continuously, including providing the required amount of outdoor air.

What we inspect

Indoor air handling system runs continuously

We check whether the indoor pool's air handling system runs continuously.

Must be: The air handling system should run continuously, including bringing in outside air, with only limited reduction allowed during posted closed hours.

CDC MAHC 5th Ed. (2024) § 5.6.2.4.1

CDC MAHC 5th Ed. (2024) § 5.6.2.8A

Combined Chlorine Reduction

The QUALIFIED OPERATOR shall develop and implement a plan to minimize COMBINED CHLORINE compounds in the INDOOR AQUATIC FACILITY from the operation of AQUATIC VENUES .

What we inspect

Combined chlorine reduction plan required (indoor)

We check whether the indoor facility has a written plan to control chloramine buildup.

Must be: The facility should have and follow a plan to keep combined chlorine (chloramine) levels down.

CDC MAHC 5th Ed. (2024) § 5.6.2.8A

The QUALIFIED OPERATOR shall develop and implement an air quality action plan with procedures for PURGING the INDOOR AQUATIC FACILITY for chemical emergencies or other indicators of poor air quality.

What we inspect

Air quality/building purge plan required (indoor)

We check whether the indoor facility has an air quality action plan.

Must be: The facility should have a written plan describing how to purge and ventilate the space during a chemical incident or poor air quality.

CDC MAHC 5th Ed. (2024) § 5.6.2.9

GFCI devices shall be tested as part of scheduled maintenance on the first day of operation, and monthly thereafter, until the BODY OF WATER is drained and the equipment is prepared for STORAGE.

What we inspect

GFCI tested first day of operation and monthly

We check whether the pool's GFCI safety outlets and breakers are being tested regularly.

Must be: GFCI devices should be tested on the first day the pool is used each season, and then monthly until it's closed for the season.

If it fails: Test each GFCI's built-in test button and log the date; replace any that fail to trip.

CDC MAHC 5th Ed. (2024) § 5.6.3.3.2

Bonding conductors, where accessible, shall be inspected visually every 6 months or whenever disrupted or impacted by site construction or other related events.

What we inspect

Bonding conductors inspected every 6 months

We check the pool's bonding wire connections where they're visible.

Must be: Visible bonding conductors should be visually inspected every 6 months, or after any nearby construction or disturbance.

If it fails: Have an electrician reconnect or repair any bonding wire that looks damaged or disconnected.

CDC MAHC 5th Ed. (2024) § 5.6.3.5.5

CDC MAHC 5th Ed. (2024) § 5.6.3.6.2

Minimum Distance from Water

All parts of an extension cord shall be restrained at a minimum of 6 feet (1.8

What we inspect

Extension cords kept 6 ft from water

We check how close extension cords are kept to the water.

Must be: Extension cords must stay at least 6 feet away from the water's edge whenever the pool is open.

If it fails: Reroute cords farther from the pool or use an outlet located farther away.

CDC MAHC 5th Ed. (2024) § 5.6.3.6.2

m) away when measured along the shortest possible path from a BODY OF WATER during times when the AQUATIC FACILITY is open.
CDC MAHC 5th Ed. (2024) § 5.6.3.7

Portable Electric Devices

Portable line-powered electrical devices, such as radios or drills, shall not be used within 6 feet (1.8

What we inspect

Portable electric devices kept 6 ft from water unless GFCI

We check the use of plug-in devices like radios or power tools near the pool.

Must be: Portable electrical devices must stay at least 6 feet from the water's edge unless they're plugged into a GFCI-protected outlet.

If it fails: Move the device farther away, or plug it into a GFCI outlet instead.

CDC MAHC 5th Ed. (2024) § 5.6.3.7

m) horizontally of the nearest inner edge of a BODY OF WATER , unless connected to a GFCI-protected circuit.
Loose, broken, or missing suction outlet covers and sumps shall be secured or replaced immediately and installed in accordance with the manufacturer's requirements.

What we inspect

Suction outlet covers repaired immediately

We check the drain and suction covers at the bottom and sides of the pool.

Must be: Any loose, cracked, or missing suction covers must be fixed or replaced right away, using the correct manufacturer part.

If it fails: Replace the cover with a manufacturer-approved part as soon as possible; this is a serious entrapment hazard.

CDC MAHC 5th Ed. (2024) § 5.7.1.5.1

P OOLS shall be closed until the required repairs can be completed.

What we inspect

Pool closed until suction outlet cover repaired

We check whether the pool has been closed to swimmers if a suction cover is damaged or missing.

Must be: The pool must stay closed to swimmers until the suction cover repair is finished.

CDC MAHC 5th Ed. (2024) § 5.7.1.5.1.1

CDC MAHC 5th Ed. (2024) § 5.7.2.2.5

Filter Media Inspections

Sand or other granular media shall be inspected for proper depth and cleanliness at least one time per year, replacing the media when necessary to restore depth or cleanliness.

What we inspect

Annual filter media inspection

We check when the filter media, such as sand, was last inspected.

Must be: Sand or granular filter media should be checked for proper depth and cleanliness at least once a year, and replaced when needed.

If it fails: Have the filter media inspected and topped off or replaced if it's overdue.

CDC MAHC 5th Ed. (2024) § 5.7.2.2.5

One full set of spare cartridges shall be maintained onsite in a clean and dry condition.

What we inspect

Spare filter cartridge set required onsite

We check whether a full spare set of filter cartridges is kept on hand.

Must be: A complete backup set of clean, dry filter cartridges should be stored on site.

If it fails: Buy and keep a spare cartridge set in a dry storage area.

CDC MAHC 5th Ed. (2024) § 5.7.2.4.4

AQUATIC VENUES not using CYA shall maintain a minimum DPD-FC concentration of 1.0 ppm (mg/L).

What we inspect

Minimum free chlorine, no cyanuric acid

We test your pool's chlorine level.

Must be: If you don't use stabilizer (cyanuric acid), free chlorine should be at least 1.0 ppm at all times.

If it fails: Add chlorine to bring the level up if it's testing low.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.1.2.1

AQUATIC VENUES using CYA shall maintain a minimum DPD- FC concentration of 2.0 ppm (mg/L).

What we inspect

Minimum free chlorine, with cyanuric acid

We test your pool's chlorine level.

Must be: If you use stabilizer (cyanuric acid), free chlorine should be at least 2.0 ppm at all times.

If it fails: Add chlorine to bring the level up if it's testing low.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.1.2.2

S PAS shall maintain a minimum DPD-FC concentration of 3.0 ppm (mg/L).

What we inspect

Minimum free chlorine, spas

We test the chlorine level in your spa or hot tub.

Must be: Spa chlorine should be at least 3.0 ppm at all times.

If it fails: Add chlorine to bring the spa's level up if it's testing low.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.1.2.3

CDC MAHC 5th Ed. (2024) § 5.7.3.1.2.2A(1)

Minimum Bromine Concentrations

1) All AQUATIC VENUES : 3.0 ppm (mg/L), and

What we inspect

Minimum bromine residual, pools

We test your pool water's bromine level.

Must be: If you sanitize with bromine, it should be at least 3.0 ppm at all times.

If it fails: Add bromine to bring the level up if it's testing low.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.2.2A(1)

CDC MAHC 5th Ed. (2024) § 5.7.3.1.2.2A(2)

Minimum Bromine Concentrations

2) S PAS : 4.00 ppm (mg/L).

What we inspect

Minimum bromine residual, spas

We test your spa's bromine level.

Must be: If your spa uses bromine, it should be at least 4.0 ppm at all times.

If it fails: Add bromine to bring the spa's level up if it's testing low.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.2.2A(2)

CDC MAHC 5th Ed. (2024) § 5.7.3.1.2.3A

Maximum Bromine Concentrations

The maximum bromine concentration shall not exceed 8.0 ppm (mg/L) at any time the AQUATIC VENUE is open to BATHERS .

What we inspect

Maximum bromine residual while open

We check that bromine levels aren't too high while the pool is in use.

Must be: Bromine should never exceed 8.0 ppm whenever people are swimming.

If it fails: Hold off on adding bromine and let the level drop before letting anyone swim.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.2.3A

The CYA concentration at all AQUATIC VENUES shall remain at or below 90 ppm (mg/L).

What we inspect

Cyanuric acid ceiling, ongoing operation

We test the stabilizer (cyanuric acid) level in your pool water.

Must be: Cyanuric acid should stay at or below 90 ppm during normal use.

If it fails: Drain and refill part of the pool with fresh water to dilute the stabilizer level.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.3.2

If the CYA level is determined to be 300 ppm (mg/L) or higher, the AQUATIC VENUES shall remain closed until immediate remediation has occurred.

What we inspect

Cyanuric acid remediation trigger

We check whether the stabilizer (cyanuric acid) level has reached a dangerous extreme.

Must be: If cyanuric acid tests at 300 ppm or higher, the pool must stay closed to swimmers until it's brought down.

If it fails: Drain and refill a significant portion of the water to dilute the stabilizer before reopening.

CDC MAHC 5th Ed. (2024) § 5.7.3.1.3.3

Concentration Residual ozone concentration in the AQUATIC VENUE water shall remain below 0.1 ppm (mg/L).

What we inspect

Residual ozone concentration ceiling

We check the residual ozone level if your pool uses an ozone system.

Must be: Residual ozone in the water should stay below 0.1 ppm.

CDC MAHC 5th Ed. (2024) § 5.7.3.2.2.2

Copper and silver concentrations shall not exceed 1.3 ppm (mg/L) for copper and 0.10 ppm (mg/L) for silver for use as disinfectants in AQUATIC VENUES and SPAS in the United States.

What we inspect

Maximum copper concentration, copper/silver systems

We test copper levels if your pool uses a copper/silver ionization system.

Must be: Copper concentration should not exceed 1.3 ppm.

If it fails: Reduce ionizer output or dilute the water if copper is running high.

CDC MAHC 5th Ed. (2024) § 5.7.3.2.3.2(copper)

Copper and silver concentrations shall not exceed 1.3 ppm (mg/L) for copper and 0.10 ppm (mg/L) for silver for use as disinfectants in AQUATIC VENUES and SPAS in the United States.

What we inspect

Maximum silver concentration, copper/silver systems

We test silver levels if your pool uses a copper/silver ionization system.

Must be: Silver concentration should not exceed 0.10 ppm.

If it fails: Reduce ionizer output or dilute the water if silver is running high.

CDC MAHC 5th Ed. (2024) § 5.7.3.2.3.2(silver)

The pH of the water shall be maintained at 7.0 - 7.8.

What we inspect

Pool pH maintained 7.0-7.8

We test your pool water's pH level.

Must be: The pH should stay between 7.0 and 7.8 at all times.

If it fails: Add pH increaser or decreaser and retest until it's back in range.

CDC MAHC 5th Ed. (2024) § 5.7.3.4.1

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.1

Dedicated and Labeled Components

All chemical feed system components shall be dedicated to a single chemical and clearly labeled to prevent the introduction of incompatible chemicals.

What we inspect

Chemical feed components dedicated and labeled

We check that chemical feed equipment like tubing, pumps, and tanks is dedicated to one chemical and clearly labeled.

Must be: Each piece of chemical feed equipment should be used for only one chemical and labeled so they don't get mixed up.

If it fails: Label unmarked lines and tanks, and never repurpose feed lines for a different chemical.

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.1

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.2.1

Response to Alarm and Bather Evacuation

When the interlock is activated stopping flow from chemical feeders per MAHC 4.7.3.2.1.3 and 5.7.3.5.1.3, or the water recirculation pump is stopped manually or unexpectedly for any reason and duration, including power outages, all BATHERS shall be evacuated from the AQUATIC VENUE until manual evaluation of the cause for interlock activation or recirculation pump interruption is completed by the RESPONSIBLE SUPERVISOR or QUALIFIED OPERATOR .

What we inspect

Bather evacuation on chemical feed interlock activation

We check the pool's procedures for what happens if the pump or chemical feed system stops or trips.

Must be: Everyone must get out of the water any time the pump stops or the chemical feed safety switch trips, until someone checks the cause.

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.2.1

BATHERS shall not be permitted to reenter the AQUATIC VENUE until the RESPONSIBLE SUPERVISOR or QUALIFIED OPERATOR has successfully understood the cause of the interlock activation and/or recirculation pump interruption and has manually overridden the interlock for restart of the recirculation pump and chemical feeder, and UV or ozone system, if applicable, for 5 minutes following the restart of these systems.

What we inspect

Bather reentry after recirculation interruption

We check the pool's procedures for letting swimmers back in after a pump or chemical feed shutdown.

Must be: Swimmers can't return until the cause is fixed and the pump, feeder, and any UV/ozone system have run normally for at least 5 minutes.

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.2.2A

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.3

Fail Proof Safety Features

Chemical feed system components shall incorporate failure- proof features so the chemicals cannot feed directly into the AQUATIC VENUE, the VENUE piping system not associated with the RECIRCULATION SYSTEM, source water supply system, or area within proximity of the AQUATIC VENUE DECK under any type of failure, low flow, or interruption of operation of the equipment to prevent BATHER exposure to high concentrations of AQUATIC VENUE treatment chemicals.

What we inspect

Chemical feed fail-proof safety features

We check that the chemical feed system has built-in safeguards against accidental chemical release.

Must be: The feed system must be designed so a malfunction, low flow, or interruption can't send chemicals directly into the pool, deck, plumbing, or water supply.

If it fails: Have a pool professional install or repair check valves, injection points, and interlocks to close the gap.

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.3

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.4.1.1

Once Monthly or Specified by Manufacturer

Unless specified otherwise by the device manufacturer, once monthly challenge testing of the chemical feeder interlock system shall be conducted by turning off recirculation pump flow to the chemical feeder and ensuring triggered shutoff of chemical feeder occurs via electrical interlock with flow meter/flow switch, paddle wheel, or other device being used to assess flow to chemical feeder.

What we inspect

Monthly challenge test of chemical feeder interlock

We check that the chemical feeder's safety shutoff switch is being tested regularly.

Must be: Unless the manufacturer says otherwise, the safety shutoff should be tested monthly by turning off the pump and confirming the chemical feeder also shuts off.

CDC MAHC 5th Ed. (2024) § 5.7.3.5.1.4.1.1

All chemical tubing, connections, support, and double containment piping shall be checked on a daily basis for leaks.

What we inspect

Chemical tubing checked daily for leaks

We check the chemical feed tubing and connections for leaks.

Must be: All chemical tubing, connections, supports, and containment piping should be inspected daily for leaks.

If it fails: Replace worn or cracked tubing and tighten loose connections.

CDC MAHC 5th Ed. (2024) § 5.7.3.5.7

Total alkalinity shall be maintained in the range of 60 to 180 ppm (mg/L).

What we inspect

Total alkalinity range

We test your pool water's total alkalinity.

Must be: Total alkalinity should be between 60 and 180 ppm.

If it fails: Add alkalinity increaser if it's low, or a pH decreaser if it's high, then retest.

CDC MAHC 5th Ed. (2024) § 5.7.4.4.1A

CDC MAHC 5th Ed. (2024) § 5.7.4.4.2A

Combined Chlorine (chloramines)

The owner shall ensure the AQUATIC FACILITY takes action to reduce the concentration of COMBINED CHLORINE (chloramines) in the water when the concentration exceeds 0.4 ppm (mg/L). Such actions may include but are not limited to:

What we inspect

Combined chlorine action threshold

We test for combined chlorine (chloramines), the byproduct that causes strong pool odor and irritation.

Must be: Combined chlorine should not exceed 0.4 ppm; if it does, the water needs corrective treatment.

If it fails: Shock the pool with extra chlorine or do a partial water exchange to clear it.

CDC MAHC 5th Ed. (2024) § 5.7.4.4.2A

1) Superchlorination,
2) Water exchange, or
3) P ATRON adherence to appropriate BATHER hygiene practices.
Calcium hardness shall not exceed 2500 ppm (mg/L).

What we inspect

Calcium hardness ceiling

We test your pool water's calcium hardness.

Must be: Calcium hardness should not exceed 2500 ppm.

If it fails: Drain and refill part of the water with fresh water to dilute the hardness.

CDC MAHC 5th Ed. (2024) § 5.7.4.4.3A

The maximum temperature for an AQUATIC VENUE is 104º F (40°C).

What we inspect

Maximum aquatic venue water temperature

We check your pool or spa's water temperature.

Must be: Water temperature should never exceed 104°F.

If it fails: Turn down or turn off the heater until the temperature drops to a safe level.

CDC MAHC 5th Ed. (2024) § 5.7.4.7.2A

DPD-FC, COMBINED AVAILABLE CHLORINE (CAC), or TOTAL BROMINE (TB), and pH shall be tested at all AQUATIC VENUES prior to opening each day.

What we inspect

Disinfectant and pH tested prior to daily opening

We check that chlorine (or bromine) and pH are being tested before the pool opens for the day.

Must be: Chlorine or bromine and pH must be tested and recorded before anyone swims each day.

CDC MAHC 5th Ed. (2024) § 5.7.5.1A

CDC MAHC 5th Ed. (2024) § 5.7.5.2

Manual Disinfectant Feed System

For all AQUATIC VENUES using a manual disinfectant feed system that delivers disinfectant via a flow through erosion feeder or metering pump without an AUTOMATED CONTROLLER , DPD-FC or bromine and pH shall be tested prior to opening to the public and every 2 hours while open to the public.

What we inspect

Testing frequency, manual disinfectant feed

We check testing records for pools with a manual chemical feeder, like an erosion feeder or metering pump without a controller.

Must be: Chlorine/bromine and pH must be tested before opening and at least every 2 hours while the pool is in use.

CDC MAHC 5th Ed. (2024) § 5.7.5.2

CDC MAHC 5th Ed. (2024) § 5.7.5.3

Automatic Disinfectant Feed System

For all AQUATIC VENUES using an automated disinfectant feed system, DPD-FC (or TB) and pH shall be tested prior to opening and every 4 hours while open to the public.

What we inspect

Testing frequency, automated disinfectant feed

We check testing records for pools with an automated chemical feed controller.

Must be: Chlorine and pH must be tested before opening and at least every 4 hours while the pool is in use.

CDC MAHC 5th Ed. (2024) § 5.7.5.3

Total Alkalinity (TA) shall be tested weekly at all AQUATIC VENUES .

What we inspect

Total alkalinity tested weekly

We check how often total alkalinity is being tested.

Must be: Total alkalinity should be tested at least once a week.

CDC MAHC 5th Ed. (2024) § 5.7.5.5

Calcium hardness shall be tested monthly at all AQUATIC VENUES .

What we inspect

Calcium hardness tested monthly

We check how often calcium hardness is being tested.

Must be: Calcium hardness should be tested at least once a month.

CDC MAHC 5th Ed. (2024) § 5.7.5.6

CYA shall be tested monthly at all AQUATIC VENUES utilizing CYA.

What we inspect

Cyanuric acid tested monthly

We check how often stabilizer (cyanuric acid) levels are being tested.

Must be: If you use stabilizer, it should be tested at least once a month.

CDC MAHC 5th Ed. (2024) § 5.7.5.7

TDS shall be tested quarterly at all AQUATIC VENUES .

What we inspect

Total dissolved solids tested quarterly

We check how often total dissolved solids are being tested.

Must be: Total dissolved solids should be tested at least once every three months.

CDC MAHC 5th Ed. (2024) § 5.7.5.9

The water in an AQUATIC VENUE shall be sufficiently clear such that the bottom is visible while the water is static at all times the AQUATIC VENUE is open or available for use.

What we inspect

Water clarity, bottom visible at all times

We check how clear the water is.

Must be: The water must be clear enough that you can see the bottom of the pool at all times, even when the water is still.

If it fails: Shock the pool, clean or backwash the filter, and run the pump longer until the water clears.

CDC MAHC 5th Ed. (2024) § 5.7.6.1

CDC MAHC 5th Ed. (2024) § 5.8.5.2.1.2A

Hard-wired Telephone for 911 Call

The AQUATIC FACILITY or each AQUATIC VENUE, as necessary, shall have a functional telephone or other communication system or device that is hard wired and capable of directly dialing 911 or function as the emergency notification system.

What we inspect

Hard-wired 911-capable communication required

We check for a working phone that can call 911 directly.

Must be: There must be a hard-wired phone or communication device that can dial 911, placed somewhere visible and easy to reach in an emergency.

If it fails: Install a dedicated landline or hard-wired emergency phone near the pool.

CDC MAHC 5th Ed. (2024) § 5.8.5.2.1.2A

An adequate supply of first aid supplies shall be continuously stocked and include, at a minimum, as follows:

What we inspect

Minimum first aid supply list

We check the first aid kit's contents.

Must be: The kit must be fully stocked at all times with a first aid guide, bandages, tape, sterile pads, gloves, scissors, an elastic wrap, an emergency blanket, a rescue breathing mask, and a bloodborne pathogen spill kit.

If it fails: Restock any missing items and replace anything that's expired or used up.

CDC MAHC 5th Ed. (2024) § 5.8.5.2.2.2A

1) A first aid guide,
2) Absorbent compress,
3) Adhesive bandages,
4) Adhesive tape,
5) Sterile pads,
6) Disposable gloves,
7) Scissors,
8) Elastic wrap,
9) Emergency blanket,
10) Resuscitation mask with one-way valve, and
11) Blood-borne pathogen spill kit.
AQUATIC FACILITIES with one QUALIFIED LIFEGUARD shall provide and maintain a U.S. Coast Guard-approved aquatic rescue throwing device as per the specifications of MAHC 5.8.5.4.1.

What we inspect

Throwing device and reaching pole at single-lifeguard facilities

We check the rescue equipment available at pools with only one lifeguard on duty.

Must be: A facility with just one lifeguard must also have a Coast Guard-approved throwing device and a reaching pole, matching the specs used for unguarded pools.

CDC MAHC 5th Ed. (2024) § 5.8.5.3.10A / .3.11A

AQUATIC FACILITIES with one QUALIFIED LIFEGUARD shall provide and maintain a reaching pole as per the specifications of MAHC 5.8.5.4.2.
At least one backboard constructed of material easily SANITIZED /disinfected shall be provided.

What we inspect

Backboard required, 2-minute response coverage

We check for a rescue backboard where lifeguards are on duty.

Must be: At least one easy-to-clean backboard with a head immobilizer and straps must be available, positioned so it can reach anywhere on the pool deck within 2 minutes.

CDC MAHC 5th Ed. (2024) § 5.8.5.3.2A / .3.2.1

The number and location of backboards shall be sufficient to affect a 2-minute response time to the location of the incident.
CDC MAHC 5th Ed. (2024) § 5.8.5.3.3A

Rescue Tube Immediately Available

Each QUALIFIED LIFEGUARD conducting PATRON surveillance with the responsibility of in-water rescue in less than 3 feet (0.9

What we inspect

Rescue tube immediately available, shallow surveillance

We check lifeguard equipment for shallow-water surveillance areas.

Must be: A lifeguard watching water shallower than 3 feet must have a rescue tube immediately within reach.

CDC MAHC 5th Ed. (2024) § 5.8.5.3.3A

m) of water shall have a rescue tube immediately available for use.
Each QUALIFIED LIFEGUARD conducting PATRON surveillance in a water depth of 3 feet (0.9

What we inspect

Rescue tube worn, deeper surveillance

We check lifeguard equipment for deeper-water surveillance areas.

Must be: A lifeguard watching water 3 feet deep or more must be wearing the rescue tube, ready to use.

CDC MAHC 5th Ed. (2024) § 5.8.5.3.4A

m) or greater shall have a rescue tube on his/her person in a rescue ready position.
QUALIFIED LIFEGUARDS shall wear attire that readily identifies them as members of the AQUATIC FACILITY ’S lifeguard staff. The word “Lifeguard” or “Guard” shall be prominently displayed on the outermost layer of a lifeguard’s uniform.

What we inspect

Lifeguard identifying uniform required

We check lifeguard attire.

Must be: Lifeguards must wear clothing that clearly identifies them, with "Lifeguard" or "Guard" visible on the outer layer.

CDC MAHC 5th Ed. (2024) § 5.8.5.3.5A

A whistle or other signaling device shall be worn by each QUALIFIED LIFEGUARD conducting PATRON surveillance for communicating to users and/or staff.

What we inspect

Lifeguard signal device required

We check that lifeguards have a signaling device.

Must be: Each lifeguard watching swimmers must be wearing a whistle or similar signaling device.

CDC MAHC 5th Ed. (2024) § 5.8.5.3.6A

CDC MAHC 5th Ed. (2024) § 5.8.5.3.9A

Personal Protective Equipment

Personal protective devices including a resuscitation mask with one-way valve and non-latex, non-powdered, one-use disposable gloves shall be worn in the form of a hip pack or attached to the rescue tube of all QUALIFIED LIFEGUARDS on-duty.

What we inspect

PPE required on-person for on-duty lifeguards

We check that on-duty lifeguards are carrying personal protective equipment.

Must be: Each lifeguard must have a rescue breathing mask and disposable gloves on their person, in a hip pack or attached to their rescue tube.

CDC MAHC 5th Ed. (2024) § 5.8.5.3.9A

AQUATIC VENUES whose depth exceeds 2 feet (61.0 cm) of standing water shall provide and maintain a U.S. Coast Guard-approved aquatic rescue throwing device, with at least a quarter-inch (6.3 mm) thick rope whose length is 50 feet (15.2

What we inspect

Throwing device required, unguarded venues over 2 ft

We check for a rescue throwing device at pools without a lifeguard.

Must be: If the water is deeper than 2 feet, there must be a Coast Guard-approved throw device with rope at least a quarter-inch thick and 50 feet long, or 1.5 times the pool's width if shorter, kept nearby and reachable.

If it fails: Buy and mount an approved throw rope of the right length near the pool.

CDC MAHC 5th Ed. (2024) § 5.8.5.4.1A

m) or 1.5 times the width of the POOL, whichever is less.
AQUATIC VENUES whose depth exceeds 2 feet (61 cm) of standing water shall provide and maintain a reaching pole of 12 feet (3.7

What we inspect

Reaching pole required, unguarded venues over 2 ft

We check for a reaching pole at pools without a lifeguard.

Must be: If the water is deeper than 2 feet, there must be a lightweight, non-telescoping pole between 12 and 16 feet long with a shepherd's crook hook at least 18 inches wide, kept nearby and reachable.

If it fails: Buy and mount a pole of the correct length and hook size near the pool.

CDC MAHC 5th Ed. (2024) § 5.8.5.4.2A

m)–16 feet (4.9
m) in length, non- telescopic, light in weight, and with a securely attached Shepherd's Crook with an aperture of at least 18 inches (45.7 cm).
CPR posters that are up to date with latest CPR programs and protocols shall be posted conspicuously at all times.

What we inspect

CPR poster required

We check for a posted CPR instruction poster.

Must be: An up-to-date CPR poster with current techniques must be displayed where it's clearly visible at all times.

If it fails: Post a current CPR reference poster near the pool.

CDC MAHC 5th Ed. (2024) § 5.8.5.4.3A

CDC MAHC 5th Ed. (2024) § 5.8.5.4.4A

Imminent Health Hazard Sign

A sign shall be posted outlining the IMMINENT HEALTH HAZARDS , which require AQUATIC VENUE or AQUATIC FACILITY closure as defined in this CODE per MAHC 6.6.3.1 and a telephone number to report problems to the owner/operator.

What we inspect

Imminent health hazard sign required, unguarded venues

We check for a posted sign explaining health hazards that would require closing the pool.

Must be: A sign must be posted listing the hazards that require closing the pool and a phone number to report problems to the owner or operator.

If it fails: Post a sign listing closure hazards and an owner/operator contact number.

CDC MAHC 5th Ed. (2024) § 5.8.5.4.4A

For any AQUATIC VENUE with standing water, a sign shall be posted signifying a QUALIFIED LIFEGUARD is not on duty and that the following rules apply:

What we inspect

No-lifeguard signage and supervision rule

We check whether a sign is posted noting no lifeguard is on duty and explaining the supervision rules for kids and groups.

Must be: If there's no lifeguard, a sign must state that swimmers under 14 need direct adult supervision and that youth groups and lessons aren't allowed without a lifeguard.

If it fails: Post a sign at the pool stating these no-lifeguard supervision rules.

CDC MAHC 5th Ed. (2024) § 5.8.5.4.5A

1) Persons under the age of 14 years cannot be in the AQUATIC VENUE without direct supervision by a person aged 18 years or older; and
2) Youth and childcare groups, training, lifeguard courses, and swim lessons are not allowed without a QUALIFIED LIFEGUARD providing PATRON surveillance.
The CHEMICAL STORAGE SPACE shall be separate from the equipment room.

What we inspect

Chemical storage separate from equipment room

We check whether pool chemicals are stored in their own separate space from the pump and filter equipment.

Must be: Chemicals must be kept in a space separate from the pump/filter equipment room, unless the health department has granted a waiver.

If it fails: Relocate chemical storage to its own enclosed space away from the equipment.

CDC MAHC 5th Ed. (2024) § 5.9.2.13

AQUATIC VENUE chemicals shall be stored to prevent access by unauthorized individuals.

What we inspect

Chemicals stored to prevent unauthorized access

We check whether pool chemicals are secured from unauthorized access.

Must be: Chemicals must be stored where unauthorized people, including children, can't get to them.

If it fails: Store chemicals in a locked cabinet, shed, or room.

CDC MAHC 5th Ed. (2024) § 5.9.2.4

AQUATIC VENUE chemicals shall be stored so that if the packages were to leak, no mixing of incompatible materials would occur.

What we inspect

Chemicals stored to prevent incompatible mixing if leaked

We check how chemicals are arranged in storage to prevent dangerous mixing.

Must be: Chemicals must be stored so that if a container leaked, it couldn't mix with an incompatible chemical nearby.

If it fails: Separate acids from chlorine products and other incompatible chemicals, using the safety data sheet as a guide.

CDC MAHC 5th Ed. (2024) § 5.9.2.6A

Possible ignition sources, including but not limited to gasoline, diesel, natural gas, or gas-powered equipment such as lawn mowers, motors, grills, POOL heaters, or portable stoves shall not be stored or installed in the CHEMICAL STORAGE SPACE.

What we inspect

No ignition sources in chemical storage space

We check the chemical storage area for fire hazards.

Must be: Gasoline, propane, gas-powered tools, pool heaters, and other ignition sources must not be stored in the chemical storage space.

If it fails: Move fuel, gas equipment, and heaters out of the chemical storage area.

CDC MAHC 5th Ed. (2024) § 5.9.2.7A

Lighting shall be at minimum 30 footcandles (323 lux) to allow operators to read labels on containers throughout the CHEMICAL STORAGE SPACE and pump room.

What we inspect

Chemical storage space lighting minimum

We check the lighting level in the chemical storage area.

Must be: Lighting must be bright enough, at least 30 footcandles, to read container labels clearly.

If it fails: Add or upgrade lighting in the storage space so labels are easy to read.

CDC MAHC 5th Ed. (2024) § 5.9.2.9A

All QUALIFIED OPERATORS , RESPONSIBLE SUPERVISORS , maintenance staff, QUALIFIED LIFEGUARD staff, or any others who are involved in the STORAGE, use, or handling of chemicals shall receive training prior to access of chemicals and receive at least an annual review of procedures thereafter for the following topics discussed in MAHC 6.0.1.1 to 6.0.1.5.

What we inspect

Chemical handling staff training before access, annual review

We check that staff who handle pool chemicals were trained before starting and get a refresher each year.

Must be: Anyone who stores, uses, or handles pool chemicals must be trained before first access and get at least an annual review covering safe handling, protective gear, and spill response.

If it fails: Schedule chemical-handling training before new hires touch chemicals, plus an annual refresher.

CDC MAHC 5th Ed. (2024) § 6.0.1 / .0.1.6

Employers shall have a training plan in place and implement training for employees on chemicals used at the AQUATIC FACILITY before their first assignment and whenever a new hazard is introduced into the work area.
Records of all training shall be recorded and maintained on file.

What we inspect

Chemical safety training records maintained

We check that records of chemical safety training are kept on file.

Must be: Records of all chemical safety training must be documented and kept on file.

If it fails: Start a training log to file each chemical safety training session.

CDC MAHC 5th Ed. (2024) § 6.0.1.7

CDC MAHC 5th Ed. (2024) § 6.0.1.9

Exposure Control Program

Employers shall have an Exposure Control Program for bloodborne pathogens as required by OSHA 29 CFR 1910.1030.

What we inspect

Bloodborne pathogen exposure control program required

We check that the facility has a written program for handling bloodborne pathogen exposure risks.

Must be: An Exposure Control Program for bloodborne pathogens must be in place for staff who may be exposed on the job, per OSHA rules.

CDC MAHC 5th Ed. (2024) § 6.0.1.9

A QUALIFIED OPERATOR of an AQUATIC FACILITY shall have completed an operator training course that is recognized by the AHJ.

What we inspect

Qualified operator training course completion required

We check that the pool operator has completed a recognized operator training course.

Must be: The pool's qualified operator must have completed a training course recognized by the local health authority.

CDC MAHC 5th Ed. (2024) § 6.1.1.1

A QUALIFIED OPERATOR shall have a current certificate or written documentation acceptable to the AHJ showing completion of an operator training course.

What we inspect

Operator certificate available onsite for inspection

We check that proof of the operator's training certificate is available onsite.

Must be: A current operator certificate (or accepted written proof of training) must be kept onsite for every operator working at the facility.

If it fails: Keep a copy of the operator's current certificate on file at the facility.

CDC MAHC 5th Ed. (2024) § 6.1.1.2 / .2.1

Originals or copies of such certificate or documentation shall be available onsite for inspection by the AHJ for each QUALIFIED OPERATOR employed at or contracted by the site, as specified in this CODE.
CDC MAHC 5th Ed. (2024) § 6.1.3.13A

Length of Certificate Validity

The maximum length of validity for QUALIFIED OPERATOR training certificate shall be 5 years.

What we inspect

Operator certificate validity maximum 5 years

We check the issue date on the operator's training certificate.

Must be: An operator training certificate is valid for no more than 5 years before it needs renewal.

If it fails: Renew the operator certificate before it reaches the 5-year mark.

CDC MAHC 5th Ed. (2024) § 6.1.3.13A

Length of valid certification shall be a maximum of 2 years for lifeguarding and first aid, and a maximum of 1 year for Cardiopulmonary Resuscitation (CPR/AED).

What we inspect

Lifeguard/first aid certification validity, 2 years; CPR/AED, 1 year

We check the expiration dates on lifeguard, first aid, and CPR/AED certifications.

Must be: Lifeguard and first aid certificates are valid for up to 2 years; CPR/AED certificates are valid for up to 1 year.

If it fails: Renew certifications before they expire — CPR/AED yearly, lifeguard and first aid every 2 years.

CDC MAHC 5th Ed. (2024) § 6.2.1.3.5A

When a certificate has expired for more than 45 days, the QUALIFIED LIFEGUARD shall retake the course.

What we inspect

Expired lifeguard certificate over 45 days requires retake

We check how long a lapsed lifeguard certificate has been expired.

Must be: If a lifeguard's certificate has been expired more than 45 days, they must retake the full course rather than a quick renewal.

If it fails: Enroll the lifeguard in a full course if their certificate has lapsed over 45 days.

CDC MAHC 5th Ed. (2024) § 6.2.1.3.7A

CDC MAHC 5th Ed. (2024) § 6.2.1A

Lifeguard Qualifications

A qualified lifeguard shall:

What we inspect

Lifeguard qualification: recognized course and current certificate

We check that lifeguards on duty completed a recognized training course and hold a current certificate.

Must be: Every lifeguard must have finished a recognized lifeguard course, hold a current certificate, and keep up with ongoing training.

CDC MAHC 5th Ed. (2024) § 6.2.1A

1) Have successfully completed an AHJ-recognized lifeguard training course offered by an AHJ- recognized training agency,
2) Possess a current certificate for such training,
3) Have met all pre-service requirements, and
4) Participate in continuing in-service training requirements of the AQUATIC FACILITY .
CDC MAHC 5th Ed. (2024) § 6.2.2.1A

Lifeguard Supervisor Qualifications

A LIFEGUARD SUPERVISOR shall have:

What we inspect

Lifeguard supervisor qualifications

We check that the lifeguard supervisor meets the required certifications and experience.

Must be: A lifeguard supervisor must hold current lifeguard and supervisor certificates, have at least 100 hours of prior lifeguarding experience, and communicate well with the team.

CDC MAHC 5th Ed. (2024) § 6.2.2.1A

1) A current certificate for lifeguard training from an AHJ-recognized agency,
2) A current certificate for LIFEGUARD SUPERVISOR training from an AHJ-recognized agency
3) Previous experience as a QUALIFIED LIFEGUARD of at least 100 hours of active duty, and
4) Ability to effectively communicate in English or languages common with safety team members and emergency services.
A QUALIFIED OPERATOR shall be onsite or immediately available within 2 hours during all hours of operation at an AQUATIC FACILITY that has:

What we inspect

Qualified operator required onsite or within 2 hrs, high-risk facilities

We check whether a qualified pool operator is onsite or reachable within 2 hours during operating hours at higher-risk facilities.

Must be: Large or high-use facilities must have a qualified operator onsite or able to arrive within 2 hours whenever the pool is open.

CDC MAHC 5th Ed. (2024) § 6.3.1.1.2 / .1.1.3

1) More than two AQUATIC VENUES ,
2) An AQUATIC VENUE of over 50,000 gallons (189,270 L) of water,
3) AQUATIC VENUES that include AQUATIC FEATURES with recirculated water,
4) An AQUATIC VENUE used as a therapy pool, or
5) An AQUATIC VENUE used to provide swimming training.
A QUALIFIED OPERATOR shall be onsite or immediately available within 2 hours during all hours of operation at an AQUATIC FACILITY that is:
1) Permitted BATHER COUNT is greater than 200 BATHERS daily,
2) Operated by a municipality, or
3) Operated by a school.
CDC MAHC 5th Ed. (2024) § 6.3.1.2

Contracted Off-site Qualified Operators

All other AQUATIC FACILITIES shall have an onsite QUALIFIED OPERATOR immediately available within 2 hours or a contract with a QUALIFIED OPERATOR for a minimum of weekly visits and assistance whenever needed.

What we inspect

Contracted off-site operator minimum weekly visits

We check whether a facility without an on-call operator has a contract for at least weekly visits from a qualified operator.

Must be: If no operator is available within 2 hours, the facility must have a qualified operator under contract to visit at least once a week and help whenever needed.

CDC MAHC 5th Ed. (2024) § 6.3.1.2

Written documentation of these visits for contracted off-site QUALIFIED OPERATOR visits and assistance consultations shall be available at the AQUATIC FACILITY for review by the AHJ.

What we inspect

Off-site operator visit documentation required

We check that written records of the contracted operator's visits are kept onsite.

Must be: Documentation of every contracted operator visit must be kept at the facility for inspectors to review.

If it fails: Start a logbook or file to record each operator visit and consultation.

CDC MAHC 5th Ed. (2024) § 6.3.1.2.1

CDC MAHC 5th Ed. (2024) § 6.3.1.2.4

Onsite Responsible Supervisor

All AQUATIC FACILITIES without a full time onsite QUALIFIED OPERATOR shall have a designated onsite RESPONSIBLE SUPERVISOR .

What we inspect

Onsite responsible supervisor required absent full-time operator

We check that someone onsite is designated to test water quality and knows when to close the pool if there's no full-time operator.

Must be: Without a full-time onsite operator, the facility must have a designated supervisor who can test and adjust water chemistry and knows when to close the pool.

If it fails: Assign and document a specific staff member as the responsible supervisor.

CDC MAHC 5th Ed. (2024) § 6.3.1.2.4

CDC MAHC 5th Ed. (2024) § 6.3.2 / 6.3.2.1A

Aquatic Facilities Requiring Qualified Lifeguards

AQUATIC VENUES with standing water and with any of the following conditions listed in MAHC 6.3.2.1 shall be required to have a lifeguard(s) sufficient to meet the requirements of MAHC section 6.3.3.1 conducting PATRON surveillance at all times the AQUATIC VENUE is open.

What we inspect

Conditions requiring qualified lifeguards

We check whether conditions at the pool (like depth, diving features, or youth group use) require lifeguards on duty.

Must be: A lifeguard is required whenever the pool has deep water over 5 feet, unsupervised kids under 14, diving boards or slides, wave action, or alcohol service, among other listed conditions.

CDC MAHC 5th Ed. (2024) § 6.3.2 / 6.3.2.1A

Note: This list includes but shall not be limited to the following:
1) For new construction occurring from the date of acceptance of this CODE, any AQUATIC VENUE deeper than 5 feet (1.5
m) at any point;
2) Any AQUATIC VENUE that allows for unsupervised children under the age of 14 years;
3) Any AQUATIC VENUE while it is being used for the recreation of youth groups, including but not limited to childcare usage or school groups;
4) Any AQUATIC VENUE while it is being used for group training must have dedicated lifeguards on DECK for class surveillance, sufficient to meet the requirements of MAHC 6.3.3.1, including but not limited to competitive swimming and/or sports, lifeguard training, exercise programs, and swimming lessons;
5) Any AQUATIC VENUE with a configuration in which any point on the AQUATIC VENUE surface exceeds 30 feet (9.1
m) from the nearest DECK;
6) Any AQUATIC VENUE with an induced current or wave action including but not limited to WAVE POOLS and LAZY RIVERS;
7) Waterslide landing pools;
8) Any AQUATIC VENUE in which BATHERS enter the water from any height above the DECK including but not limited to diving boards, DROP SLIDES , starting platforms, and/or climbing walls. This includes POOL SLIDES that discharge into water depths deeper than 5 feet (1.5
m); and
9) Any AQUATIC FACILITY that sells or serves alcohol within the AQUATIC VENUE ENCLOSURE, during the periods when alcohol is sold or served.
CDC MAHC 5th Ed. (2024) § 6.3.3.1.1A(2)

Zone of Patron Surveillance

2) The QUALIFIED LIFEGUARD is able to reach the furthest extent of the assigned zone of PATRON surveillance within 20 seconds;

What we inspect

Lifeguard zone reachable within 20 seconds

We check that lifeguard surveillance zones are small enough for a lifeguard to reach any point quickly.

Must be: A lifeguard must be able to reach the farthest point of their assigned watch area within 20 seconds.

CDC MAHC 5th Ed. (2024) § 6.3.3.1.1A(2)

2) Operating in a manner so as to provide an alternation of tasks such that no QUALIFIED LIFEGUARD conducts PATRON surveillance activities for more than 60 continuous minutes, and

What we inspect

Lifeguard surveillance rotation, 60-minute maximum

We check that lifeguard shifts include rotation so no one watches the water too long without a break.

Must be: No lifeguard may watch the water for more than 60 minutes straight without a break.

CDC MAHC 5th Ed. (2024) § 6.3.3.1.2A(2)

2) Have a period of at least 10 minutes of non-PATRON surveillance activity such as taking a break, conducting maintenance, or conducting ride dispatch.

What we inspect

Minimum 10-minute non-surveillance break

We check that lifeguard rotation schedules include real breaks away from watching the water.

Must be: Lifeguard breaks (for rest, maintenance, or other duties) must last at least 10 minutes.

CDC MAHC 5th Ed. (2024) § 6.3.3.1.3(2)

EAPS and operating procedures shall include but not be limited to:

What we inspect

Emergency Action Plan required elements

We check that the facility's Emergency Action Plan covers the key emergency response details.

Must be: The Emergency Action Plan must identify possible emergencies, how staff will communicate, who responds and does what, needed equipment, and when to close the facility.

If it fails: Update the Emergency Action Plan to cover all six required elements.

CDC MAHC 5th Ed. (2024) § 6.3.3.2A

1) Outline types of emergencies and IMMINENT HEALTH HAZARDS , as per MAHC 6.6.3;
2) Outline the methods of communication between responders, emergency services, and PATRONS ;
3) Identify each anticipated responder;
4) Outline the tasks of each responder;
5) Identify required equipment for each task; and
6) Emergency closure requirements.
CDC MAHC 5th Ed. (2024) § 6.3.3.3

Pre-service Requirements

The Pre-Service Plan shall include:

What we inspect

Pre-service training required before active duty

We check that new safety staff are trained on facility-specific procedures before they start work.

Must be: Staff must complete facility-specific policy training and demonstrate their safety skills before going on duty, with the training documented.

CDC MAHC 5th Ed. (2024) § 6.3.3.3

1) Policies and procedure training specific to the AQUATIC FACILITY ,
2) Demonstration of SAFETY TEAM skills specific to the AQUATIC FACILITY prior to assuming on-duty lifeguard responsibilities, and
3) Documentation of training.
CDC MAHC 5th Ed. (2024) § 6.3.3.3.6A

Documentation of Pre-service Training

Documentation verifying the pre-service requirements shall be completed by the person conducting the pre-service training, maintained at the facility for 3 full years, and be available for inspection.

What we inspect

Pre-service training documentation retained 3 years

We check that records proving pre-service training was completed are kept on file.

Must be: Pre-service training records must be kept at the facility for at least 3 years and available for review.

If it fails: Keep a dated training file for each staff member for at least 3 years.

CDC MAHC 5th Ed. (2024) § 6.3.3.3.6A

CDC MAHC 5th Ed. (2024) § 6.3.3.4.1A

Documentation of In-service Training

Documentation verifying the in-service requirements shall be completed by the person conducting the in-service training, maintained at the AQUATIC FACILITY for 3 years, and available for inspection.

What we inspect

In-service training documentation retained 3 years

We check that records of ongoing (in-service) staff training are kept on file.

Must be: In-service training records must be kept at the facility for at least 3 years and available for review.

If it fails: Keep a dated training file for each staff member for at least 3 years.

CDC MAHC 5th Ed. (2024) § 6.3.3.4.1A

The designated person(s) with CPR/AED and first aid training shall maintain certifications to show the following:

What we inspect

Annual CPR/AED renewal for designated staff

We check that staff trained in CPR/AED and first aid have current, unexpired certifications.

Must be: Designated staff must renew CPR/AED training every year and keep their first aid certification current.

If it fails: Schedule annual CPR/AED refresher training for designated staff.

CDC MAHC 5th Ed. (2024) § 6.3.3.4.4

1) CPR/AED training is completed annually and certificates are unexpired, and
2) First aid training certificates are unexpired.
All AQUATIC FACILITIES shall create and implement a SAFETY PLAN to include, but not be limited to the following elements:

What we inspect

Written safety plan required

We check that the facility has a written safety plan covering staffing, emergencies, and training.

Must be: A written safety plan must exist covering staffing, an emergency action plan, a contamination response plan, and staff training.

If it fails: Create a written safety plan covering these five areas and keep it onsite.

CDC MAHC 5th Ed. (2024) § 6.3.3A

1) Staffing plan,
2) EAP,
3) Biohazard action plan,
4) Pre-service training plan, and
5) In-service training plan.
CDC MAHC 5th Ed. (2024) § 6.3.4.3.1A(1)

Minimum Number of Lifeguards

1) An AQUATIC FACILITY having a single zone of patron surveillance shall have a minimum of two

What we inspect

Minimum two lifeguards, single surveillance zone

We check the number of lifeguards on duty when there's only one watch zone.

Must be: If the pool has a single watch zone, at least two qualified lifeguards must be present and ready to respond.

CDC MAHC 5th Ed. (2024) § 6.3.4.3.1A(1)

CDC MAHC 5th Ed. (2024) § 6.3.4.3.3A

Shallow Water Certified Lifeguards

QUALIFIED LIFEGUARDS certified for shallow water depths shall not be assigned to a BODY OF WATER in which any part of the water’s depth is greater than the depth for which they are certified.

What we inspect

Shallow-water certified lifeguards not assigned beyond depth

We check that lifeguards are only assigned to areas matching their depth certification.

Must be: A lifeguard certified only for shallow water can't be assigned to watch any area of the pool deeper than their certification allows.

If it fails: Assign shallow-water-certified lifeguards only to shallow zones, or have them recertify for deeper water.

CDC MAHC 5th Ed. (2024) § 6.3.4.3.3A

While conducting BATHER surveillance, QUALIFIED LIFEGUARDS shall not engage in social conversations or have on their person or lifeguard station, reading materials, cellular telephones, texting devices, music players, or other similar non-emergency electronic devices.

What we inspect

Lifeguards prohibited from distractions while surveilling

We check that on-duty lifeguards aren't distracted by phones, reading, or other devices while watching swimmers.

Must be: While watching the water, lifeguards can't chat socially or keep phones, books, or other non-emergency devices on their person or station.

CDC MAHC 5th Ed. (2024) § 6.3.4.3.5A

CDC MAHC 5th Ed. (2024) § 6.3.4.4.1A

Lifeguard Supervisor Required

AQUATIC FACILITIES that are required to have two or more QUALIFIED LIFEGUARDS to satisfy Zone responsibilities per the Zone Plan of BATHER Surveillance in MAHC 6.3.3.1.1, shall have an additional person at the AQUATIC FACILITY during all hours of operation designated as the LIFEGUARD SUPERVISOR who meets the requirement of MAHC 6.2.2.

What we inspect

Lifeguard supervisor required for multi-lifeguard facilities

We check whether a lifeguard supervisor is designated at facilities that need two or more lifeguards.

Must be: If the pool needs two or more lifeguards to cover its zones, a separate lifeguard supervisor must also be onsite during all open hours.

CDC MAHC 5th Ed. (2024) § 6.3.4.4.1A

A written EAP shall be developed, maintained, and updated as necessary for the AQUATIC FACILITY .

What we inspect

Written EAP required with annual review

We check that the facility has a written Emergency Action Plan that's reviewed with staff every year.

Must be: A written Emergency Action Plan must exist, stay updated, and be reviewed with staff and management at least once a year, with the review date recorded.

If it fails: Hold and log an annual EAP review meeting with staff and management.

CDC MAHC 5th Ed. (2024) § 6.3.4.5.2 / .5.3

The EAP shall be reviewed with the AQUATIC FACILITY staff and management annually or more frequently as required when changes occur with the dates of the review recorded in the EAP.
CDC MAHC 5th Ed. (2024) § 6.3.4.5.4

Available for Inspection

The written EAP shall be kept at the AQUATIC FACILITY and available for emergency personnel and/or AHJ upon request.

What we inspect

EAP kept onsite and available on request

We check that a copy of the Emergency Action Plan is kept at the facility.

Must be: The written Emergency Action Plan must be kept onsite and ready to show emergency responders or inspectors on request.

CDC MAHC 5th Ed. (2024) § 6.3.4.5.4

A written Facility Evacuation Plan shall be developed and maintained for the facility.

What we inspect

Written facility evacuation plan required

We check that the facility has a written evacuation plan for emergencies.

Must be: A written evacuation plan must cover drowning, serious injury, chemical accidents, and severe weather, with clear staff roles.

If it fails: Draft a written evacuation plan covering these emergency types and assign staff roles.

CDC MAHC 5th Ed. (2024) § 6.3.4.5.7 / .5.7.1

This plan shall include at a minimum:
1) Actions to be taken in cases of drowning, serious illness or injury, chemical handling accidents, weather emergencies, and other serious incidents; and
2) Defined roles and responsibilities for all staff.
AQUATIC FACILITIES shall have a contingency/response plan for localized weather events that may affect their operation (i.e., lightning, hurricanes, tornados, high winds, etc.).

What we inspect

Inclement weather contingency plan required

We check that the facility has a plan for closing and reopening during severe weather like lightning or high winds.

Must be: A written weather contingency plan must cover staff training, evacuation steps, and criteria for reopening after events like lightning or storms.

If it fails: Write a weather closure/reopening plan and train staff on it.

CDC MAHC 5th Ed. (2024) § 6.3.4.5.9A

Lifeguard-based remote SAFETY MONITORING systems shall not replace the need for QUALIFIED LIFEGUARDS .

What we inspect

Remote monitoring cannot substitute for lifeguards

We check that camera or remote monitoring systems aren't being used in place of an actual lifeguard.

Must be: Remote video monitoring can only supplement lifeguard coverage of blind spots, not replace lifeguards.

CDC MAHC 5th Ed. (2024) § 6.3.4.6.1A

Supervisors shall not permit employees who are ill with diarrhea to enter the water or perform in a QUALIFIED LIFEGUARD role.

What we inspect

Staff with diarrheal illness excluded from water/lifeguard duty

We check that sick staff with diarrhea are kept out of the water and off lifeguard duty.

Must be: Employees with diarrhea can't enter the pool or work as a lifeguard until they're well.

CDC MAHC 5th Ed. (2024) § 6.3.4.7.1

Supervisors shall permit employees with open wounds in the water or in a QUALIFIED LIFEGUARD role only if they have healthcare provider approval or wear a waterproof, occlusive bandage to cover the wound.

What we inspect

Staff open wounds require covering or approval

We check that staff with open wounds are cleared to work near the water or have the wound properly covered.

Must be: Staff with open wounds need either a doctor's approval or a waterproof, sealed bandage before entering the water or working as a lifeguard.

CDC MAHC 5th Ed. (2024) § 6.3.4.7.2

AQUATIC FACILITY records shall be:

What we inspect

Facility records retained minimum 3 years

We check that operation and maintenance records are kept on file for the required time.

Must be: Pool operation, maintenance, and management records must be kept for at least 3 years and available on request.

If it fails: Set up a filing system to retain records for at least 3 years.

CDC MAHC 5th Ed. (2024) § 6.4.1.2.1

1) Kept for a minimum of 3 years and
2) Available upon request by the AHJ.
The QUALIFIED OPERATOR or RESPONSIBLE SUPERVISOR shall ensure that a daily AQUATIC FACILITY preventive maintenance inspection is done before opening and that it shall include:

What we inspect

Daily preventive maintenance inspection checklist

We check that the operator completes a daily walk-through inspection before the pool opens.

Must be: Before opening each day, staff must check the deck, drain covers, skimmers, signage, safety equipment, water treatment systems, gates, and water clarity, among other items.

If it fails: Use a daily opening checklist to confirm all these items before letting swimmers in.

CDC MAHC 5th Ed. (2024) § 6.4.1.3.1

1) Walkways/ DECK and exits are clear, clean, free of debris;
2) Drain covers, vacuum fitting covers, SKIMMER equalizer covers, and any other suction outlet covers are in place, secure, and unbroken;
3) S KIMMER baskets, weirs, lids, flow adjusters, and suction outlets are free of any blockage;
4) INLET and return covers and any other fittings are in place, secure, and unbroken;
5) Safety warning signs and other signage are in place and in good repair;
6) Safety equipment as required by this CODE are in place and in good repair, including emergency instructions and phone numbers;
7) Entrapment prevention systems are operational;
8) Recirculation, DISINFECTION systems, controller(s), and probes are operating as required;
9) S ECONDARY TREATMENT and/or SUPPLEMENTAL TREATMENT systems are operating as required;
10) Underwater lights and other lighting are intact with no exposed wires or water in lights;
11) Slime and biofilm have been removed from accessible surfaces of AQUATIC VENUES , SLIDES , and other
12) AQUATIC FEATURES ;
13) Doors to nonpublic areas (CHEMICAL STORAGE SPACES, offices, etc.) are locked;
14) First aid supplies are stocked;
15) Emergency communication equipment and systems are operational;
16) Fecal/vomit/blood incident CONTAMINATION RESPONSE PLANS , materials, and equipment are available;
17) Water features and amenities are functioning in accordance with the manufacturer’s recommendations;
18) Fencing/ ENCLOSURES , gates, and self-latching or other locks are tested and are intact and functioning properly, and ENCLOSURES do not have nearby furniture to encourage climbing;
19) Drinking fountains are clean and in functional condition;
20) Electrical devices are in good working condition and meet the requirements specified in the MAHC;
21) Alarms, if required, are tested and functioning properly; and
22) Assessing water clarity such that the bottom and objects in the POOL are clearly visible.
The owner/operator shall ensure that a record is made of all injuries and illness incidents at the AQUATIC FACILITY which:

What we inspect

Illness/injury incident report required

We check that serious illness or injury incidents at the pool are documented.

Must be: Any death, resuscitation, medical transport, or waterborne-illness diagnosis at the pool must be recorded with the date, details, people involved, and outcome.

If it fails: Create an incident report form covering these details for serious events.

CDC MAHC 5th Ed. (2024) § 6.4.1.4.1 / .4.2

1) Result in death;
2) Require resuscitation, CPR, oxygen, or AED use to be initiated;
3) Require transportation or treatment of a PATRON to a medical facility; or
4) Results in a PATRON being diagnosed with a RWI.
Illness and injury incident report information shall include:
1) Date,
2) Time,
3) Location,
4) Incident including type of illness or injury and cause or mechanism,
5) Names and addresses of the individuals involved,
6) Actions taken,
7) Equipment used, and
8) Outcome of the incident.
In addition to making such records, the owner/operator shall ensure that the AHJ is notified within 24 hours of the occurrence of an incident recorded in MAHC 6.4.1.4.1.

What we inspect

AHJ notified within 24 hours of recordable incident

We check that the health department is notified promptly after a serious incident.

Must be: The local health authority must be notified within 24 hours of a recordable illness or injury incident.

CDC MAHC 5th Ed. (2024) § 6.4.1.4.3A

The owner/operator shall also record all lifeguard rescues where the QUALIFIED LIFEGUARD enters the water and activates the aquatic EAP.

What we inspect

Lifeguard rescue records required

We check that water rescues by lifeguards are logged.

Must be: Every time a lifeguard enters the water to rescue someone, it must be recorded with the date, time, names involved, and reason for the rescue.

If it fails: Add a rescue log to record these details each time a lifeguard performs a rescue.

CDC MAHC 5th Ed. (2024) § 6.4.1.4.4A

A chemical inventory log shall be maintained onsite to provide a list of chemicals used in the AQUATIC VENUE water and surrounding DECK that could result in water quality issues, chemical interactions, or PATRON exposure.

What we inspect

Chemical inventory log required onsite

We check that a log of pool chemicals used onsite is kept and current.

Must be: A chemical inventory log must list all chemicals used in the pool and on the deck, including when test reagents expire.

If it fails: Keep an updated chemical inventory log onsite, including reagent expiration dates.

CDC MAHC 5th Ed. (2024) § 6.4.1.5

CDC MAHC 5th Ed. (2024) § 6.4.1.6A

Daily Water Monitoring and Testing Records

Daily, or as often as required, MONITORING and testing records shall include, but are not limited to the following:

What we inspect

Daily water monitoring and testing records required

We check that the facility keeps daily water-testing and equipment records, like pH, chlorine, pump pressure, and temperature.

Must be: Daily records must be kept covering pH, disinfectant levels, pump pressure, water temperature, and other required readings.

If it fails: Start a daily log tracking pH, chlorine, pump pressure, temperature, and other required readings.

CDC MAHC 5th Ed. (2024) § 6.4.1.6A

1) pH;
2) Disinfectant residuals;
3) C OMBINED CHLORINE concentrations;
4) Operating pressures of water recirculation pumps and filters or the corresponding flow rate from flow meter readings;
5) CYA concentrations, if used;
6) Maintenance and malfunctioning of equipment, including dates and time of all equipment calibration including WQTDs;
7) Dates of challenge testing of the chemical feeder interlock system as outlined in MAHC 5.7.3.5.1.4.1;
8) If heated, AQUATIC VENUE water temperature;
9) The time of filter backwash or cleaning;
10) Calcium hardness;
11) Total alkalinity;
12) Saturation index;
13) Microbiological testing, if applicable, dates/times samples were taken and results;
14) Any equipment failure, power outage, or error resulting in the interruption of the circulation, filtration, or DISINFECTION systems for more than 1 hour;
15) The daily attendance at the AQUATIC FACILITY . In POOLS where attendance is not ordinarily recorded, a guest sign in book can be used to track attendance,
16) S ECONDARY TREATMENT as outlined in MAHC 5.7.3.7.7 and 5.7.3.7.8; and
17) Readings from the turbidity meter.
CDC MAHC 5th Ed. (2024) § 6.4.1.7

Staff Certifications on File

The originals or copies of all required QUALIFIED LIFEGUARD , LIFEGUARD SUPERVISOR , or QUALIFIED OPERATOR certificates shall be maintained at the AQUATIC FACILITY and made available to AHJ, staff, and PATRONS upon request.

What we inspect

Staff certifications on file and available on request

We check that copies of lifeguard, lifeguard supervisor, and pool operator certifications are kept on site and available on request.

Must be: Certification records for lifeguards and operators must be kept on hand and shown if requested.

If it fails: Keep certificate copies in a binder on site so they're ready to show inspectors or guests.

CDC MAHC 5th Ed. (2024) § 6.4.1.7

A Body Fluid Contamination Response Log shall be maintained to document each occurrence of contamination of the water or its immediately adjacent areas by formed or diarrheal fecal material, whole stomach discharge of vomit, and blood.

What we inspect

Body Fluid Contamination Response Log required

We check that the facility keeps a log documenting each contamination incident.

Must be: A written log must record every fecal, vomit, or blood contamination event affecting the water or nearby areas.

If it fails: Start a Body Fluid Contamination Response Log and keep it onsite.

CDC MAHC 5th Ed. (2024) § 6.4.1.8.1A

The log shall include the following information recorded at the time of the incident:

What we inspect

Contamination log required data fields

We check that the contamination log captures all the required details for each incident.

Must be: Each log entry must include who responded, the date and time, the area affected, chlorine and pH readings before and after, the treatment used, and when the pool reopened.

If it fails: Update the contamination log template to capture all required fields.

CDC MAHC 5th Ed. (2024) § 6.4.1.8.3

1) Person conducting response;
2) Qualified operator or onsite responsible supervisor on duty;
3) Date and time of incident response;
4) Specific area, if not in the water, contaminated by incident;
5) B ATHER COUNT or reasonable approximation of the number of BATHERS in the AQUATIC VENUE at the time of incident (if applicable);
6) Type and form of body fluid observed (for example, diarrheal or formed stool, vomit, or blood);
7) Date and time when the area was closed;
8) Whether the POOL uses CHLORINE stabilizer and concentration at time of incident;
9) Residual disinfectant (e.g., DPD-FC) concentration and pH at the time of incident;
10) Remediation procedures used after the incident including contact time, if applicable;
11) Residual disinfectant (e.g., DPD-FC) concentration and pH at the time of reopening the AQUATIC VENUE to the public;
12) Stabilizer concentration, if used, at the time of reopening; and
13) Date and time of reopening.
The lettering shall be legible and at least 1 inch (25.4 mm or 3- point type) high, with a contrasting background.

What we inspect

Facility rules signage minimum lettering height

We check that posted rules signs use large enough, easy-to-read lettering with good contrast.

Must be: Rule sign lettering must be at least 1 inch tall on a contrasting background.

If it fails: Replace small or hard-to-read signs with ones using at least 1-inch letters on a contrasting background.

CDC MAHC 5th Ed. (2024) § 6.4.2.2.2

CDC MAHC 5th Ed. (2024) § 6.4.2.2.3.4

Facilitieswithout Lifeguards

In addition to signage messages 1 through 13, unstaffed AQUATIC FACILITIES shall also include signage messages covering:

What we inspect

Unstaffed facility additional signage

We check that unstaffed pools post extra warning signs about supervision requirements and hours of use.

Must be: An unstaffed pool must warn that children under 14 need direct adult supervision and must post its allowed hours of use.

If it fails: Add a sign noting there's no lifeguard, that kids under 14 need adult supervision, and the posted hours.

CDC MAHC 5th Ed. (2024) § 6.4.2.2.3.4

1) No Lifeguard on Duty: Children under the age of 14 years must have direct supervision by a person aged 18 years or older and
2) Hours of operation: AQUATIC FACILITY use prohibited at any other time.
CDC MAHC 5th Ed. (2024) § 6.4.2.2.3.4.2

Automatic External Defibrillator

When installed for public access, a location sign shall be provided clearly labeled “AED”. This sign shall be mounted at a height of 7 feet (2.1

What we inspect

AED signage height and standard

We check the placement and height of the sign marking the AED location, if one is installed.

Must be: The AED sign must be mounted 7 feet high, clearly labeled, and visible from every direction.

If it fails: Remount the AED sign at 7 feet so it's visible from all approaches.

CDC MAHC 5th Ed. (2024) § 6.4.2.2.3.4.2

m) and comply with ISO 7010 and be visible from all directions of traffic.
In addition to the MAHC 6.4.2.2.3 requirements, SPAS shall also have the following information or text complying with the intent of the following information:

What we inspect

Spa-specific signage requirements

We check that the spa posts extra warnings about water temperature, health risks, and supervision rules.

Must be: Spa signage must include the maximum water temperature, age and health warnings, and a rule against using the spa alone.

If it fails: Add a spa sign covering the 104°F max temperature, health warnings, and the no-solo-use rule.

CDC MAHC 5th Ed. (2024) § 6.4.2.2.3.7A

1) Maximum water temperature is 104° F (40°C);
2) Children under age 5 and people using alcohol or drugs that cause drowsiness shall not use SPAS ;
3) Pregnant women and people with heart disease, high blood pressure or other health problems should not use SPAS without prior consultation with a healthcare provider;
4) Children under 14 years of age shall be supervised by an adult; and
5) Use of the SPA when alone is prohibited (if no lifeguards onsite).
Signage shall be placed in a conspicuous place at the entrance of the AQUATIC FACILITY communicating expected and prohibited behaviors and other information using text that complies with the intent of the following information:

What we inspect

Required facility rule sign messages

We check that an entrance sign lists the required safety messages, like emergency instructions, hours, and swimming rules.

Must be: A visible entrance sign must cover items such as the 911 emergency instructions, hours, capacity, and health and safety rules.

If it fails: Post a single entrance sign covering all the required safety messages.

CDC MAHC 5th Ed. (2024) § 6.4.2.2.3A

1) In case of an emergency, dial 911 or other emergency instructions, per MAHC 6.3.4.5.8;
2) Hours of operation;
3) Theoretical peak occupancy
4) Pollution of AQUATIC VENUE prohibited;
5) Do not swim if you have open wounds
6) Do not swim if you are ill with diarrhea or vomiting,
7) S HOWER before entering the water;
8) No glass items in the AQUATIC VENUE or on the DECK;
9) Do not swallow or spit water;
10) Diaper changing on the DECK is prohibited;
11) No Diving, as applicable per MAHC 5.5.5;
12) Intentional hyperventilation or extended breath holding activities are dangerous and prohibited;
13) No animals in the AQUATIC VENUE and no animals on the DECK, except service animals, if applicable;
14) No rough play; and
15) Children must be supervised by a responsible adult (parent or caregiver) up to the minimum age established by the AQUATIC FACILITY .
The results of the most recent AHJ inspection of the AQUATIC FACILITY shall be posted at the AQUATIC FACILITY in a location conspicuous to the public.

What we inspect

Most recent AHJ inspection results posted

We check whether the facility's most recent official health inspection report is posted where the public can see it.

Must be: The latest health department inspection results must be displayed somewhere visible to the public.

If it fails: Post a printed copy of the latest inspection report near the entrance or on a bulletin board.

CDC MAHC 5th Ed. (2024) § 6.4.2.3.2A

CDC MAHC 5th Ed. (2024) § 6.5.1.1

Contamination Response Plan

All AQUATIC FACILITIES shall have a CONTAMINATION RESPONSE PLAN within the EAP for responding to formed-stool contamination, diarrheal- stool contamination, vomit contamination, and contamination involving blood.

What we inspect

Fecal/vomit/blood contamination response plan required

We check that the facility has a written plan for responding to fecal, vomit, or blood contamination in the water.

Must be: A contamination response plan covering formed stool, diarrhea, vomit, and blood incidents must be part of the Emergency Action Plan.

If it fails: Add a contamination response section to the Emergency Action Plan.

CDC MAHC 5th Ed. (2024) § 6.5.1.1

A minimum of one person onsite while the AQUATIC FACILITY is open for use shall be:

What we inspect

Trained contamination-response staff onsite at all times open

We check that someone trained in contamination cleanup and safety gear is onsite whenever the pool is open.

Must be: At least one person trained in fecal, vomit, and blood contamination response — and in proper protective gear — must be onsite during all open hours.

CDC MAHC 5th Ed. (2024) § 6.5.1.2.1A

1) Trained in the procedures for response to formed-stool contamination, diarrheal contamination, vomit contamination, and blood contamination and
2) Trained in PPE and other OSHA measures including the Bloodborne Pathogens Standard 29 CFR 1910.1030 to minimize exposure to bodily fluids that may be encountered as employees in an aquatic environment.
CDC MAHC 5th Ed. (2024) § 6.5.1.3

Equipment and Supply Verification

The availability of equipment and supplies for remediation procedures shall be verified by the QUALIFIED OPERATOR at least weekly.

What we inspect

Contamination remediation supplies verified weekly

We check that contamination cleanup supplies are inspected and restocked regularly.

Must be: The pool operator must check that contamination cleanup equipment and supplies are on hand at least once a week.

If it fails: Add a weekly supply check to the operator's routine and log it.

CDC MAHC 5th Ed. (2024) § 6.5.1.3

The response plan shall be reviewed at least annually and updated as necessary.

What we inspect

Contamination response plan reviewed annually

We check when the contamination response plan was last reviewed.

Must be: The contamination response plan must be reviewed at least once a year and updated as needed.

If it fails: Schedule an annual review of the contamination response plan and note the date.

CDC MAHC 5th Ed. (2024) § 6.5.1.4

In the event of a fecal or vomit contamination in an AQUATIC VENUE, the QUALIFIED OPERATOR shall immediately close the AQUATIC VENUE to swimmers until remediation procedures are complete.

What we inspect

Immediate closure upon fecal/vomit contamination

We check that the pool is closed right away if fecal matter or vomit contaminates the water.

Must be: The pool (and any other pool sharing its filtration system) must close to swimmers immediately after a fecal or vomit contamination until cleanup is finished.

CDC MAHC 5th Ed. (2024) § 6.5.2.1 / .2.1.1

This closure shall include the affected AQUATIC VENUE and other AQUATIC VENUES that share the same RECIRCULATION SYSTEM.
Contaminating material shall be removed (e.g., using a net, scoop, or bucket) and disposed of in a sanitary manner.

What we inspect

Physical contaminant removal, no vacuum unless disinfectable

We check how contaminating material is removed from the water and whether a pool vacuum is used improperly.

Must be: Solid contamination must be scooped out and disposed of properly; a pool vacuum can only be used if its waste goes to a sewer and the equipment can be fully disinfected.

CDC MAHC 5th Ed. (2024) § 6.5.2.2 / .2.2.2A

Aquatic vacuum cleaners shall not be used for removal of contamination from the water or adjacent surfaces unless vacuum waste is discharged to a sanitary sewer and the vacuum equipment can be adequately disinfected.
AQUATIC VENUE water that has been contaminated by feces or vomit shall be treated as follows:

What we inspect

Pre-remediation water preparation for fecal/vomit events

We check that pH and water temperature are adjusted correctly before shock-treating a fecal or vomit event.

Must be: Before treatment, the pH must be 7.5 or lower and the water at least 77°F, with the pump running and only non-stabilized chlorine used to raise chlorine levels.

CDC MAHC 5th Ed. (2024) § 6.5.2.3A

1) Check to ensure that the water’s pH is 7.5 or lower and adjust if necessary;
2) Verify and maintain water temperature at 77°F (25°C) or higher;
3) Operate the filtration/ RECIRCULATION SYSTEM while the POOL reaches and maintains the proper DPD-FC concentration during the remediation process;
4) Test the FREE CHLORINE RESIDUAL at multiple sampling points to ensure the proper DPD-FC concentration is achieved throughout the POOL for the entire DISINFECTION time; and
5) Use only non-stabilized CHLORINE products to raise the DPD-FC concentrations during the remediation.
CDC MAHC 5th Ed. (2024) § 6.5.3.1.1A

Pools Containing Chlorine Stabilizers

In AQUATIC VENUE water that contains CYA, water shall be treated by doubling the inactivation time required under MAHC 6.5.3.1.

What we inspect

Formed-stool disinfection time doubled with cyanuric acid

We check whether the pool uses a stabilizer (cyanuric acid) that requires longer contamination treatment times.

Must be: If the water contains cyanuric acid stabilizer, the required disinfection contact time for formed-stool contamination must be doubled.

CDC MAHC 5th Ed. (2024) § 6.5.3.1.1A

CDC MAHC 5th Ed. (2024) § 6.5.3.1A

Formed-stool Contamination

Formed-stool contaminated water shall have the DPD-FC concentration checked and the DPD-FC concentration raised to 2.0 ppm (mg/L) (if less than 2.0 ppm [mg/L]) and maintained for at least 25 minutes (or an equivalent time and concentration to reach the CT INACTIVATION VALUE) before reopening the AQUATIC VENUE.

What we inspect

Formed-stool disinfection: 2.0 ppm FC for 25 minutes

We check the chlorine level and treatment time after a formed-stool contamination.

Must be: Chlorine must be raised to at least 2.0 ppm and held there for at least 25 minutes before reopening.

CDC MAHC 5th Ed. (2024) § 6.5.3.1A

CDC MAHC 5th Ed. (2024) § 6.5.3.2A

Diarrheal-stool Contamination

In an AQUATIC VENUE with diarrheal stool contaminated water, the qualified operator shall:

What we inspect

Diarrheal-stool disinfection: 20 ppm FC for 12.75 hours

We check the chlorine level and treatment time after a diarrheal-stool contamination.

Must be: Chlorine must be raised to at least 20 ppm and held for at least 12.75 hours before reopening, unless an approved secondary treatment system is used instead.

CDC MAHC 5th Ed. (2024) § 6.5.3.2A

1) Check the DPD-FC concentration and then raise the DPD-FC concentration to at least 20.0 ppm (mg/L) and maintain for at least 12.75 hours (or an equivalent time and concentration to reach the CT INACTIVATION VALUE of 15,300 mg min/L) before reopening the AQUATIC VENUE or
2) Circulate the water through a SECONDARY TREATMENT to theoretically reduce the number of Cryptosporidium OOCYSTS in the AQUATIC VENUE below one OOCYST/100 mL as outlined in MAHC 4.7.3.3.2.4.
Vomit-contaminated water shall have the DPD-FC concentration checked and the DPD-FC concentration raised to 2.0 ppm (mg/L) (if less than 2.0 mg/L) and maintained for at least 25 minutes (or an equivalent time and concentration to reach the CT INACTIVATION VALUE ) before reopening the AQUATIC VENUE.

What we inspect

Vomit contamination disinfection: 2.0 ppm FC for 25 minutes

We check the chlorine level and treatment time after a vomit contamination.

Must be: Chlorine must be raised to at least 2.0 ppm and held for at least 25 minutes before reopening.

CDC MAHC 5th Ed. (2024) § 6.5.3.3A

Blood contamination of a properly maintained AQUATIC VENUE ’S water does not pose a public health risk to swimmers.

What we inspect

Blood contamination does not require closure

We check how the facility handles blood contamination in the water.

Must be: Blood in properly maintained pool water isn't considered a health risk, so closing and treating it is optional, at the operator's discretion.

CDC MAHC 5th Ed. (2024) § 6.5.3.4A

If a bodily fluid, such as feces, vomit, or blood, has contaminated a surface in an AQUATIC FACILITY , facility staff shall limit access to the affected area until remediation procedures have been completed.

What we inspect

Surface contamination: limit access until remediated

We check that contaminated deck or surface areas are blocked off until cleaned.

Must be: If feces, vomit, or blood contaminates a surface, that area must stay off-limits until it's fully cleaned and disinfected.

CDC MAHC 5th Ed. (2024) § 6.5.4.1A

Contaminated surfaces shall be disinfected with one of the following DISINFECTION solutions:

What we inspect

Surface disinfection: 1:10 bleach, 20-minute soak

We check how contaminated surfaces are cleaned and disinfected.

Must be: Contaminated surfaces must be disinfected with a 1-part-bleach-to-10-parts-water solution (or an equivalent product), left to sit at least 20 minutes.

CDC MAHC 5th Ed. (2024) § 6.5.4.4A / .5

1) A 1:10 dilution of fresh household bleach with water or
2) An equivalent EPA–REGISTERED disinfectant that has been approved for body fluids DISINFECTION.
The disinfectant shall be left to soak on the affected area for a minimum of 20 minutes or as otherwise indicated on the disinfectant label directions.
CDC MAHC 5th Ed. (2024) § 6.6.3.1A(10)

Violations Requiring Immediate Correction or Closure

10) Unprotected overhead electrical wires within 20 feet horizontally of the AQUATIC VENUE;

What we inspect

Imminent hazard: overhead wires within 20 ft of venue

We check the distance between overhead power lines and the pool.

Must be: Unprotected overhead power lines must be at least 20 feet away from the pool, measured horizontally.

If it fails: Have a licensed electrician relocate, bury, or shield power lines that are closer than 20 feet.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(10)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(11)

Violations Requiring Immediate Correction or Closure

11) Non GFCI protected electrical receptacles within 20 feet of the inside wall of the AQUATIC VENUE;

What we inspect

Imminent hazard: non-GFCI receptacles within 20 ft of venue

We check that electrical outlets near the pool are GFCI-protected.

Must be: Any outlet within 20 feet of the pool must be GFCI-protected.

If it fails: Have an electrician add GFCI protection to any outlet within 20 feet of the pool.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(11)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(13)

Violations Requiring Immediate Correction or Closure

13) Absence of all required lifesaving equipment on DECK;

What we inspect

Imminent hazard: absence of required lifesaving equipment

We check that required lifesaving equipment, like a reaching pole and life ring, is present on the pool deck.

Must be: Required lifesaving equipment must be present and accessible on the deck at all times.

If it fails: Add a shepherd's hook (reaching pole) and a ring buoy with rope near the pool.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(13)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(20)

Violations Requiring Immediate Correction or Closure

20) Broken, unsecured, or missing main drain grate or any submerged suction outlet grate in the AQUATIC VENUE;

What we inspect

Imminent hazard: broken or missing main drain grate

We check that the main drain cover and any other underwater drain covers are present, secure, and undamaged.

Must be: Every drain cover in the pool must be intact, unbroken, and firmly secured in place.

If it fails: Replace any cracked, loose, or missing drain cover with a matching certified anti-entrapment cover before reopening.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(20)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(21)

Violations Requiring Immediate Correction or Closure

21) Number of BATHERS /patrons exceeds the theoretical peak occupancy;

What we inspect

Imminent hazard: bather count exceeds theoretical peak occupancy

We check that the number of people using the pool doesn't exceed its posted maximum capacity.

Must be: The number of swimmers in the pool at one time must not exceed the posted maximum occupancy.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(21)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(3)

Violations Requiring Immediate Correction or Closure

3) Disinfectant residual concentrations that exceed maximum level while BATHERS are present (CHLORINE-DPD-FC above 10 ppm (mg/L), Bromine above 8.0 ppm (mg/L));

What we inspect

Imminent hazard: disinfectant residual above maximum with bathers present

We test the chlorine or bromine level to make sure it isn't dangerously high while people are swimming.

Must be: Chlorine must stay no higher than 10 ppm (or bromine no higher than 8 ppm) whenever swimmers are in the water.

If it fails: Stop swimming, let chemical levels drop or dilute the water, then retest before reopening.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(3)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(4)

Violations Requiring Immediate Correction or Closure

4) AQUATIC VENUES using CHLORINE STABILIZERS where the CYA:DPD-FC ratio exceeds 45:1

What we inspect

Imminent hazard: CYA:FC ratio exceeds 45:1

We test the balance between stabilizer (cyanuric acid) and chlorine to make sure the chlorine can still disinfect effectively.

Must be: The cyanuric acid to chlorine ratio must stay at or below 45 to 1.

If it fails: Drain and refill part of the water, or pause stabilized chlorine, to bring cyanuric acid back down.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(4)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(5)

Violations Requiring Immediate Correction or Closure

5) pH below 6.5;

What we inspect

Imminent hazard: pH below 6.5

We test the water's pH to make sure it isn't too acidic for swimmers.

Must be: pH must be at least 6.5.

If it fails: Add a pH increaser (soda ash) to raise the pH back into a safe range.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(5)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(6)

Violations Requiring Immediate Correction or Closure

6) pH above 8.0;

What we inspect

Imminent hazard: pH above 8.0

We test the water's pH to make sure it isn't too alkaline for swimmers.

Must be: pH must be no higher than 8.0.

If it fails: Add a pH decreaser (muriatic acid or sodium bisulfate) to bring the pH back down.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(6)

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(9)

Violations Requiring Immediate Correction or Closure

9) Failure to provide interlock controls and flow meters/flow switches/pressure switches in accordance with section 4.7.3.2.1.3, or the flow meters/flow switches/pressure switches are not operating properly, or the flow meters/flow switches/pressure switches have been disabled or bypassed;

What we inspect

Imminent hazard: chemical feed interlock/flow monitoring failure

We check that safety interlocks and flow monitors on the chemical feed system are installed, working, and not bypassed.

Must be: Required flow switches and interlock controls on the chemical feed system must be present, functioning, and never disabled.

If it fails: Have a pool technician repair or reinstall the flow switch and interlock system.

CDC MAHC 5th Ed. (2024) § 6.6.3.1A(9)

When a placard is used, it shall be conspicuously posted at each entrance leading to the AQUATIC VENUE.

What we inspect

Placard posted at each entrance for uncorrected hazard

We check whether a closure notice is posted at every entrance if a serious safety hazard hasn't been fixed yet.

Must be: If a serious hazard remains uncorrected, a closure notice must be posted at every entrance to the pool.

CDC MAHC 5th Ed. (2024) § 6.6.4.2

Within 15 days of the AHJ placarding an AQUATIC FACILITY, the operator of such AQUATIC FACILITY shall be provided with an opportunity to be heard and present proof that continued operation of the facility does not constitute a danger to the public health.

What we inspect

Operator hearing opportunity within 15 days of placarding

We note whether the facility was given a chance to respond within 15 days after being closed for a hazard.

Must be: The health department must give the operator a chance to be heard within 15 days of a closure.

CDC MAHC 5th Ed. (2024) § 6.6.4.3

The AHJ shall inspect the premises within two working days of notification that the hazard has been eliminated to remove the placards after verifying correction.

What we inspect

AHJ follow-up inspection within 2 working days

We check whether a follow-up inspection happened within two working days after a hazard was reported fixed.

Must be: A re-inspection must take place within two working days of being notified that the hazard is corrected.

CDC MAHC 5th Ed. (2024) § 6.6.4.4

CDC MAHC 5th Ed. (2024) § Table 6.5.3.2.1

Table 6.5.3.2.1: Inactivation Time

Table 6.5.3.2.1: Inactivation Time

What we inspect

Diarrheal-stool inactivation time by CYA level and FC dose

We check the stabilizer (cyanuric acid) level in the water when figuring out how long a diarrheal-stool treatment must run.

Must be: The required treatment time depends on the stabilizer level and chlorine dose chosen — higher stabilizer levels need longer treatment unless the water is partially drained and refreshed.

CDC MAHC 5th Ed. (2024) § Table 6.5.3.2.1

InitialLog-InactivationInactivationInactivation
% of pool
[CYA]reduction bytime for 20time for 30time for 40
drained/refilled
(mg/L)drainingppm DPD-FCppm DPD-FCppm DPD-FC
≤ 15 0 0 28 hours 18 hours 8.5 hours
30 50% 0.30 25.2 hours 16.2 hours 7.7 hours
50 70% 0.52 23.2 hours 14.9 hours 7.0 hours
70 79% 0.67 21.8 hours 14.0 hours 6.6 hours
90 83% 0.78 20.7 hours 13.3 hours 6.3 hours
MAHC 4.1.1.5

Required Statements

All construction plans shall include the following statements:

What we inspect

Construction plans include required conformity statements

We check that the pool's construction plans include the two required conformity statements.

Must be: The plans must state that the facility will be built exactly as approved, and that no changes or extra equipment can be added without submitting them for approval first.

If it fails: Add the two required conformity statements to the construction plans before resubmitting for approval.

MAHC 4.1.1.5

1) “The proposed aquatic facility and all equipment shall be constructed and installed in conformity with the approved plans and specifications or approved amendments,” and
2) “No substantial alteration, changes, additions, or equipment not specified in the approved plans can be made or added until the plans for such substantial alteration, changes, additions, or equipment are submitted to and approved by the AHJ.”
MAHC 4.1.2.3.5.3

Calculating Theoretical Peak Occupancy

The THEORETICAL PEAK OCCUPANCY shall be calculated by dividing the surface area in square feet of the AQUATIC VENUE by the density factor (D) that fits the specific AQUATIC VENUE being considered. THEORETICAL PEAK OCCUPANCY = AQUATIC VENUE Surface Area / D The density factors (D) are Water/ BATHER -related:

What we inspect

Theoretical peak occupancy calculated from venue area and density factor

We check how the pool facility's maximum bather load was calculated.

Must be: Peak occupancy is figured by dividing each area's square footage by its density factor — for example, 20 sq ft per person in calm water and 50 per person on deck.

MAHC 4.1.2.3.5.3

1) FLAT WATER density factor = 20 ft2 (1.9 m2) per BATHER .
2) AGITATED WATER density factor = 15 ft2 (1.4 m2) per BATHER .
3) HOT WATER density factor = 10 ft2 (0.9 m2) per BATHER .
4) WATERSLIDE LANDING POOL density factor = manufacturer-established capacity at any given time.
5) INTERACTIVE WATER PLAY water density factor = 10 ft2 (0.9 m2) per BATHER on surface.
6) S URF POOL density factor = manufacturer-established capacity at any given time. Non-water/PATRON-related:
7) DECK density factor = 50 ft2 (4.6 m2) per BATHER .
8) S TADIUM SEATING density factor = 6.6 ft2 (0.6 m2) per BATHER .
9) Diving Boards and Tall Platforms density factor = 300 ft2 (27.9 m2) per BATHER
MAHC 4.1.3.3.3.1

Documentation

Where emergency replacements are installed as per MAHC 4.1.3.3.3, the owner shall submit documentation for review and approval of the replacement to the AHJ within 45 days.

What we inspect

Emergency equipment replacement documented to AHJ within 45 days

We check that any emergency equipment swap, like a pump, filter, or feeder, was reported to the health department in time.

Must be: If equipment was replaced on an emergency basis before getting prior approval, documentation of the replacement must be submitted for review within 45 days.

If it fails: Submit documentation of the emergency equipment replacement to the health department within 45 days of installing it.

MAHC 4.1.3.3.3.1

MAHC 4.1.4.1

Construction Compliance

Certificate A certificate of construction compliance shall be submitted to the AHJ for all AQUATIC FACILITY plans for new construction and SUBSTANTIAL ALTERATIONS requiring AHJ approvals.

What we inspect

Construction compliance certificate required for new construction

We check that a construction compliance certificate was submitted for the pool's build or major renovation.

Must be: A design professional must submit a certificate of construction compliance to the health department for any new pool or major alteration.

If it fails: Have the design professional submit the construction compliance certificate to the health department.

MAHC 4.1.4.1

Except as required in MAHC 4.10.2.2, a drinking fountain, toilet, HANDWASHING STATION , and DIAPER -CHANGING STATION shall be located no greater than 300 feet (91

What we inspect

Hygiene fixtures required within 300 ft of each venue

We check the walking distance from the pool to the nearest restroom, water fountain, and hand-washing station.

Must be: These facilities must be within 300 feet of the pool, or 200 feet and clearly visible for pools designed for young children.

If it fails: Add closer restroom or hand-washing facilities, or relocate the pool area.

MAHC 4.10.2.1A

m) walking distance from each AQUATIC VENUE.
MAHC 4.10.3.3.1A

Opening Grill Covers

Floor drain opening grill covers shall be ½-inch (1.3 cm) or less in width or diameter.

What we inspect

Hygiene facility floor drain grill openings limited to 1/2 inch

We check the openings in the floor drains inside the restroom and shower area.

Must be: Floor drain grill openings must be no wider than 1/2 inch.

If it fails: Replace floor drain covers with narrower-slot grates.

MAHC 4.10.3.3.1A

The minimum number of CLEANSING SHOWERS shall be one per sex for AQUATIC FACILITIES less than 4000 square feet (372 m2) in collective AQUATIC VENUE surface area.

What we inspect

Min one cleansing shower per sex per 4,000 sq ft venue area

We check the number of outdoor rinse showers available for the size of your pool area.

Must be: At least one shower per sex is required for up to 4,000 square feet of pool surface area, with an extra shower per sex for each additional 4,000 square feet.

If it fails: Add rinse showers so the count matches your pool's total surface area.

MAHC 4.10.4.2.1A

MAHC 4.10.4.2.7

Maximum and Minimum Temperature

C LEANSING SHOWER s running water shall be delivered at a temperature between 90 degrees F (32 degrees C) and 120 degrees F (49 degrees C).

What we inspect

Cleansing shower water temperature between 90F and 120F

We check the water temperature at the rinse showers.

Must be: Shower water must run between 90°F and 120°F.

If it fails: Adjust the water heater or mixing valve so shower temperature falls in the 90-120°F range.

MAHC 4.10.4.2.7

MAHC 4.10.4.5.1A

Each Facility

All AQUATIC FACILITIES allowing use by diaper-aged BATHERS shall, upon adoption of this CODE, have at least one DIAPER -CHANGING STATION in each male and female HYGIENE FACILITY or make available a unisex DIAPER -CHANGING STATION .

What we inspect

Diaper-changing station required in each hygiene facility (or a unisex station)

We check for a diaper-changing station in the restrooms.

Must be: There must be a changing station in each restroom, or one shared unisex station.

If it fails: Install a wall-mounted diaper-changing station in the restroom or a shared unisex space.

MAHC 4.10.4.5.1A

MAHC 4.10.6.1A

Prohibited

FOOT BATHS shall be prohibited.

What we inspect

Foot baths are prohibited

We check whether the facility has a foot bath.

Must be: Foot baths are not allowed at all.

If it fails: Remove or permanently disconnect the foot bath.

MAHC 4.10.6.1A

MAHC 4.11.3.1

Protected

The potable water supply serving an AQUATIC VENUE shall be protected against BACKPRESSURE consisting of either of the following:

What we inspect

Cross-connection air gap: at least 2 pipe diameters or 6 inches

We check the gap between the fresh water fill line and the pool water it fills into.

Must be: There must be an air gap of at least 6 inches (or two pipe widths, whichever is bigger) above the water, or an approved backflow preventer instead.

If it fails: Raise the fill line or install a backflow prevention device so pool water can't siphon into the drinking water supply.

MAHC 4.11.3.1

1) An acceptable air gap consisting of a vertical distance of not less than two pipe diameters of the water supply pipe or 6 inches (15.2 cm), whichever is greater, over the lowest free-flowing discharge point of the receiving pipe, tank, or vessel. Splash guards that are open to the atmosphere may be used around the air gap, or
2) Where permitted, an approved RPZ BACKPRESSURE preventer installed according to the plumbing CODE and the AHJ.
MAHC 4.12.1.11.2

Not Less Than

Emergency Shut Off or control switches shall be located:

What we inspect

Spa emergency shutoff switch located 5-10 feet horizontally from spa walls

We check the location of the spa's emergency shutoff switch.

Must be: The switch must be within sight of the spa and between 5 and 10 feet from its inside walls.

If it fails: Relocate the emergency shutoff switch so it's within sight of the spa and 5-10 feet from its walls.

MAHC 4.12.1.11.2

1) Within sight of the SPA, and
2) Not less than 5 feet (1524 mm) or greater than 10 feet (3048 mm) horizontally from the inside walls of the SPA.
MAHC 4.12.1.7A

Temperature

Water temperatures shall not exceed 104°F (40°C).

What we inspect

Spa water temperature must not exceed 104F

We check the spa's water temperature.

Must be: Spa water must not be hotter than 104°F.

If it fails: Adjust the heater's thermostat or high-limit control so it can't exceed 104°F.

MAHC 4.12.1.7A

MAHC 4.12.2.1.2.1

Engineer Compliance

The DESIGN PROFESSIONAL shall provide documentation and/or certification that the WATERSLIDE design is in conformance with these STANDARDS :

What we inspect

Waterslide design must conform to ASTM F2376 and F2461

We check for documentation showing the waterslide was engineered to recognized safety standards.

Must be: The slide's designer must certify it meets industry standards for waterslide and aquatic play equipment design.

If it fails: Obtain manufacturer or engineer certification confirming the slide meets the required design standards.

MAHC 4.12.2.1.2.1

1) ASTM F2376-17a Standard Practice for Classification, Design, Manufacture, Construction, and Operation of Water Slide Systems and
2) ASTM F2461-16e1. Standard Practice for Manufacturer, Construction, Operation, and Maintenance of Aquatic Play Equipment.
MAHC 4.12.2.3.1

Water Level

WATERSLIDES shall be designed to terminate at or below water level, except for DROP SLIDES or unless otherwise permitted by the WATERSLIDE manufacturer and ASTM F2376.

What we inspect

Waterslides must terminate at or below water level except drop slides

We check where the bottom of your waterslide ends relative to the water surface.

Must be: Waterslides must end at or below the water's surface, except for drop slides or as the manufacturer allows.

MAHC 4.12.2.3.1

WATERSLIDE RUNOUTS, if used, shall have a planned means of egress, unless one of the walls of the RUNOUT is not more than 19 inches (48.3 cm) in height.

What we inspect

Waterslide runouts require planned egress unless wall is 19 inches or less

We check how swimmers exit the landing area at the bottom of a waterslide.

Must be: Slide runout areas need a clear way to exit the water, unless the runout wall is 19 inches tall or shorter.

If it fails: Add exit steps, or lower the runout wall to make exiting easy.

MAHC 4.12.2.7.1

MAHC 4.12.2.9.1

Designed for Safety

All SLIDES installed as an appurtenance to an AQUATIC VENUE shall be designed, constructed, and installed to provide a safe environment for all BATHERS utilizing the AQUATIC VENUE in accordance with applicable ASTM STANDARDS . Portable slides are prohibited.

What we inspect

Portable slides are prohibited

We check whether any pool slide is a permanent, properly engineered installation rather than a portable add-on.

Must be: Slides must be professionally designed and permanently installed to recognized safety standards; portable slides aren't allowed.

If it fails: Remove any portable slide and replace it with a permanently installed, code-compliant one.

MAHC 4.12.2.9.1

MAHC 4.12.2.9.4.3

Netting or Barrier

Such netting or other BARRIER shall be designed such that any underwater opening does not allow for the passage of a 4 inch (10.2 cm) ball and no opening can create a finger entrapment.

What we inspect

Slide underwater barrier must exclude a 4-inch ball, no finger gaps

We check the space underneath your slide for gaps a person could get stuck in.

Must be: Any underwater barrier below the slide must block a 4-inch ball and have no gaps that could trap fingers.

If it fails: Install or repair netting so no opening is larger than 4 inches or finger-sized.

MAHC 4.12.2.9.4.3

MAHC 4.12.3.3.3

Caisson Enclosure

Caisson ENCLOSURES that prevent the passage of a 4-inch (10.2 cm) ball shall be provided for all WAVE POOLS .

What we inspect

Wave pool caisson enclosures must exclude a 4-inch ball

We check the wave-generating equipment enclosure for gaps large enough to trap a swimmer.

Must be: The enclosure on a wave pool's wave-making equipment must block anything larger than a 4-inch ball from passing through.

MAHC 4.12.3.3.3

If a BULKHEAD is operated with an open area underneath, safety signage shall be provided on the bulkhead, in letters at least 4 inches (102 mm) high, which states “DANGER! DO NOT SWIM UNDER BULKHEAD.”

What we inspect

Open bulkhead requires 'DANGER! DO NOT SWIM UNDER BULKHEAD' signage

We check for warning signage if the pool has a movable bulkhead with open space underneath.

Must be: A sign reading "DANGER! DO NOT SWIM UNDER BULKHEAD" in letters at least 4 inches tall must be posted on the bulkhead.

If it fails: Add the required warning sign to the bulkhead.

MAHC 4.12.7.12

The gap between the BULKHEAD and the POOL wall shall be no greater than 1.5 inches (3.8 cm).

What we inspect

Bulkhead gap to pool wall limited to 1.5 inches

We check the gap between a movable bulkhead and the pool wall.

Must be: The gap between a movable bulkhead and the pool wall must be no more than 1.5 inches.

If it fails: Adjust or reseal the bulkhead so the gap to the wall is no more than 1.5 inches.

MAHC 4.12.7.5A

A BARRIER shall be provided to separate an INTERACTIVE WATER PLAY VENUE from another BODY OF WATER within the same facility.

What we inspect

Interactive water play needs barrier unless 15 ft from other water

We check the separation between an interactive water play area, like a splash pad, and any other body of water.

Must be: A barrier is required unless the two are at least 15 feet apart.

If it fails: Add a barrier, or confirm the 15-foot separation is met.

MAHC 4.12.8.8

A BARRIER shall be provided to separate a WADING POOL from other POOLS unless the WADING POOL is separated by a distance of 15 feet (4.6

What we inspect

Wading pool requires barrier from other pools unless 15 feet apart

We check the separation between a wading pool and any other pool or body of water.

Must be: A barrier is required unless the wading pool sits at least 15 feet from the other water.

If it fails: Install a barrier between the pools, or relocate one so they're at least 15 feet apart.

MAHC 4.12.9.2A

m) from other BODIES OF WATER .
MAHC 4.2.1.10

Not Permitted

Wood, sand, or earth shall not be permitted as an interior finish.

What we inspect

Wood, sand, or earth prohibited as pool interior finish

We check what material lines the inside of the pool.

Must be: The pool's interior surface cannot be finished in wood, sand, or bare earth.

If it fails: Replace the wood, sand, or earth surface with an approved pool finish like plaster, tile, or a vinyl liner.

MAHC 4.2.1.10

MAHC 4.2.1.7.2

Skimmer Pools

S KIMMER POOLS shall have a 6 inch (152 mm) to 12 inch (305 mm) high waterline finish that meets the requirements of MAHC 4.2.1.7 and 4.2.1.7.1.

What we inspect

Skimmer pool waterline finish band 6-12 inches high

We check the height of the tile or finish band around the pool's waterline.

Must be: The waterline finish band must be between 6 and 12 inches tall and durable enough for regular scrubbing.

MAHC 4.2.1.7.2

MAHC 4.2.1.8A

Slip Resistant

P OOL floors in areas less than 3 feet (0.9

What we inspect

Pool floor slip-resistant finish required in water under 3 feet deep

We check the texture of the pool floor in the shallow areas.

Must be: Floor areas in water less than 3 feet deep must have a slip-resistant finish.

If it fails: Apply a slip-resistant finish or coating to shallow floor areas that feel slick.

MAHC 4.2.1.8A

m) deep shall have a SLIP -RESISTANT finish.
MAHC 4.5.10.2

Pool Lifts

All POOL lifts shall be CERTIFIED, LISTED, AND LABELED in accordance with UL 60335-2-1000, and be installed and used in accordance with the manufacturer’s installation instructions and ICC/ANSI A117.1.

What we inspect

Pool lifts must be UL 60335-2-1000 listed and installed per manufacturer

We check that the pool lift is properly certified and installed the way the manufacturer specifies.

Must be: The lift must carry UL 60335-2-1000 certification and be installed and used exactly as the manufacturer and accessibility standards direct.

If it fails: Replace an uncertified lift with a UL-listed model, or have it reinstalled according to the manufacturer's instructions.

MAHC 4.5.10.2

MAHC 4.5.11.1A

White or Light Pastel

Floors and walls below the water line shall be white or light pastel in color such that from the POOL DECK a BATHER is visible on the POOL floor and the following items can be identified:

What we inspect

Pool floor/walls below waterline must be white or light pastel

We check the color and visibility of the pool's floor and walls below the waterline.

Must be: Surfaces below the waterline must be white or a light pastel color, light enough that a swimmer in trouble, algae, dirt, or cracks can be spotted from the deck.

If it fails: Resurface or repaint the pool interior in a white or light pastel finish that meets the visibility standard.

MAHC 4.5.11.1A

1) Algae growth, debris, or dirt within the POOL;
2) C RACKS in the surface finish of the POOL; and
3) Reference tiles defined in MAHC 4.5.1.2.
P OOL walls shall be plumb within a +/- 3 degree tolerance to a water depth of at least 5 feet (1.5

What we inspect

Pool walls plumb within 3 degrees to 5-foot depth

We check whether the pool walls are properly vertical down to at least 5 feet deep.

Must be: Walls must be within 3 degrees of straight up-and-down to a depth of at least 5 feet, unless the design uses support ledges below.

MAHC 4.5.12.1

m) unless the wall design requires structural support ledges and slopes below to support the upper wall. Refer to MAHC Figure 4.5.12.1. Figure 4.5.12.1: Plumb Pool Walls: Cross-Section
These handholds shall be installed not greater than 9 inches (22.9 cm) above, or 3 inches (7.6 cm) below static water level.

What we inspect

Pool handholds installed within 9 inches above to 3 inches below waterline

We check the height of the pool's perimeter handholds, like the gutter, coping, bars, or recessed grips, relative to the water surface.

Must be: Handholds must sit no more than 9 inches above the water and no more than 3 inches below it.

MAHC 4.5.14.1.1

P OOL water depths shall be clearly and permanently marked at the following locations:

What we inspect

Depth markers required at minimum, maximum, and slope-break points

We check that depth markers are posted at all the required spots around the pool.

Must be: Depth must be clearly and permanently marked at the shallowest point, the deepest point, both sides and each end, and where the floor slope changes between shallow and deep.

If it fails: Add permanent depth markers at any missing minimum-depth, maximum-depth, end, or slope-break locations.

MAHC 4.5.19.1.1

1) Minimum depth,
2) Maximum depth,
3) On both sides and at each end of the POOL, and
4) At the break in the floor slope between the shallow and deep portions of the POOL.
MAHC 4.5.19.1.6

Twenty-five Foot Intervals

Depth markers shall be installed at not more than 25 (7.6

What we inspect

Depth markers spaced no more than 25 feet apart around perimeter

We check the spacing between depth markers around the pool's edge.

Must be: Depth markers must appear at least every 25 feet around the pool perimeter.

If it fails: Add additional depth markers so no gap around the perimeter exceeds 25 feet.

MAHC 4.5.19.1.6

m)- foot intervals around the POOL perimeter edge and according to the requirements of this section.
MAHC 4.5.19.1.6.1

Five Feet or Less

For water less than 5 feet (1.5

What we inspect

Water under 5 feet deep marked at 1-foot depth intervals

We check that depth markers are posted every foot in the shallower parts of your pool.

Must be: In water under 5 feet deep, depth must be marked at every 1-foot increment.

MAHC 4.5.19.1.6.1

m) in depth, the depth shall be marked at 1 foot (30.5 cm) depth intervals.
MAHC 4.5.19.2.3A

Color and Height

Depth markers shall have letters and numbers with a minimum height of 4 inches (10.2 cm) of a color contrasting with background.

What we inspect

Depth marker numerals at least 4 inches high, contrasting color

We check that the numbers on your depth markers are large and easy to read.

Must be: Depth marker numerals must be at least 4 inches tall and a color that stands out from the background.

MAHC 4.5.19.2.3A

MAHC 4.5.19.2.4.1.1

Abbreviations

Symbols for feet (‘) and inches (“) shall not be permitted on water depth signs.

What we inspect

Foot/inch symbols prohibited on depth marking signs

We check how your depth markers label feet and inches.

Must be: Depth signs must spell out or abbreviate feet and inches as FT and IN rather than using the ' and " symbols.

If it fails: Replace markers that use ' or " symbols with ones labeled FT and IN.

MAHC 4.5.19.2.4.1.1

MAHC 4.5.19.3

Tolerance

Depth markers shall be located to indicate water depth to the nearest 3 inches (7.6 cm), as measured from the POOL floor 3 feet (0.9

What we inspect

Depth markers must indicate water depth to nearest 3 inches

We check how accurately your depth markers reflect the true water depth.

Must be: Depth markers must show the actual water depth to within 3 inches.

MAHC 4.5.19.3

m) out from the POOL wall to the gutter lip, mid-point of surface SKIMMER (S ), or surge weir(s).
“NO DIVING” warning signs and symbols shall be spaced at no more than 25 foot (7.6

What we inspect

No Diving signs spaced no more than 25 feet apart

We check the spacing of No Diving signs around the pool edge.

Must be: No Diving signs must appear at least every 25 feet around the pool perimeter.

If it fails: Add more No Diving signs so none are spaced further than 25 feet apart.

MAHC 4.5.19.4.1.1

m) intervals around the POOL perimeter edge.
For POOL water depths 5 feet (1.5

What we inspect

No Diving signs required at depth markers where pool depth is 5 feet or less

We check that every depth marker has a matching No Diving warning where the pool is 5 feet deep or less.

Must be: Each depth marker on a pool 5 feet deep or shallower must be paired with a No Diving sign and symbol.

If it fails: Install No Diving signage next to each depth marker.

MAHC 4.5.19.4.1A

m) or shallower, all DECK depth markers required by MAHC 4.5.19 shall be provided with “NO DIVING” warning signs along with the universal international symbol for “NO DIVING.”
MAHC 4.5.19.4.4

At Least Four Inches

All lettering and symbols shall be at least 4 inches (10.2 cm) in height.

What we inspect

No Diving marker lettering and symbols at least 4 inches high

We check the size of the lettering and symbols on your No Diving signs.

Must be: No Diving sign lettering and symbols must be at least 4 inches tall.

MAHC 4.5.19.4.4

MAHC 4.5.19.5.1A

Over Five Feet

For POOLS deeper than 5 feet (1.5

What we inspect

Contrasting band required at floor slope break in pools over 5 ft

We check for a marked line where the pool floor slopes down into deeper water.

Must be: Pools deeper than 5 feet need a permanent contrasting-color line, 2 to 6 inches wide, at the slope break, running up the wall to the waterline.

If it fails: Have a pool contractor paint or tile a contrasting line where the floor slope changes.

MAHC 4.5.19.5.1A

m), a line of contrasting color, not less than 2 inches (5.1 cm) and not more than 6 inches (15.2 cm) in width, shall be clearly and permanently installed on the POOL floor at the shallow side of the break in the floor slope, and extend up the POOL walls to the waterline.
MAHC 4.5.19.8A

Wading Pool Depth Markers

AQUATIC VENUES where the maximum water depth is 6 inches (15.2 cm) of water or less (such as WADING POOLS and ACTIVITY POOL areas) shall not be required to have depth markings or “NO DIVING” signage.

What we inspect

Wading pools 6 inches deep or less exempt from depth markings/No Diving signage

We confirm whether your pool qualifies as a shallow wading area exempt from depth and No Diving signage.

Must be: Pools or areas with water 6 inches deep or less don't need depth markers or No Diving signs.

MAHC 4.5.19.8A

MAHC 4.5.2.1A

Under Five Feet

In water depths under 5 feet (1.5

What we inspect

Pool floor slope limited to 1:12 in water under 5 feet deep

We check how steeply the pool floor slopes in the shallow end.

Must be: In water less than 5 feet deep, the floor can drop no more than 1 foot for every 12 feet you move across it.

MAHC 4.5.2.1A

m), the slope of the floor of all POOLS shall not exceed 1 foot (30.5 cm) vertical drop for every 12 feet (3.7
m) horizontal.
MAHC 4.5.2.2

Five Feet or Over

In water depths 5 feet (1.5

What we inspect

Pool floor slope limited to 1:3 in water 5 feet deep or greater

We check how steeply the pool floor slopes in the deeper areas.

Must be: In water 5 feet deep or more, the floor can drop no more than 1 foot for every 3 feet you move across it.

MAHC 4.5.2.2

m) and greater, the slope of the floors of all POOLS shall not exceed 1 foot (30.5 cm) vertical to 3 feet (0.9
m) horizontal. Exception: P OOLS designed and used for competitive diving shall be designed to meet the STANDARDS of the sanctioning organization (such as NFHS, NCAA, USA Diving, or World Aquatics).
MAHC 4.5.3.1A

Accessibility

Each POOL shall have a minimum of two means of access and egress, with one located within 10 feet (3.0

What we inspect

Pool requires two means of access/egress near shallow and deep ends

We check that the pool has at least two ways to get in and out, positioned near the shallow and deep ends.

Must be: The pool must have at least two access points: one within 10 feet of the shallowest end and one within 10 feet of the deepest end.

If it fails: Add a ladder, steps, or other access point near the shallow or deep end so both are within 10 feet of an entry or exit.

MAHC 4.5.3.1A

m) of the shallowest end, and one located within 10 feet of the deepest end of the POOL, where applicable, with the exception of:
1) Waterslide landing pools,
2) Waterslide runouts, and
3) Wave pools.
MAHC 4.5.3.3.1

Distance Apart

For POOLS wider than 30 feet (9.1

What we inspect

Access/egress points on wide pools spaced no more than 75 feet apart

We check the spacing of entry and exit points along a wide pool's perimeter.

Must be: Pools wider than 30 feet must have access points on each side, spaced no more than 75 feet apart.

If it fails: Add extra ladders or steps along the pool's sides so no gap between access points exceeds 75 feet.

MAHC 4.5.3.3.1

m), such means of access / egress shall not be more than 75 feet (22.9
m) apart.
MAHC 4.5.4.2

Outlined Edges

The leading horizontal and vertical edges of stair treads shall be outlined with a continuous SLIP -RESISTANT, contrasting tile or other permanent marking of not less than 1 inch (25.4 mm) and not greater than 2 inches (50.8 mm).

What we inspect

Stair tread edges outlined with 1-2 inch contrasting slip-resistant marking

We check that the edges of the pool stairs are marked in a contrasting, slip-resistant strip.

Must be: The front edges of each stair tread must have a continuous contrasting, slip-resistant marking between 1 and 2 inches wide.

If it fails: Add contrasting, slip-resistant tape or tile trim, 1 to 2 inches wide, along the stair tread edges.

MAHC 4.5.4.2

Stairs shall have a minimum uniform horizontal tread depth of 12 inches (30.5 cm), and a minimum unobstructed tread width of 24 inches (61.0 cm).

What we inspect

Stair treads minimum 12 inch depth, 24 inch unobstructed width

We measure the depth and width of the pool stair treads.

Must be: Each stair tread must be at least 12 inches deep and at least 24 inches wide, with nothing blocking that width.

MAHC 4.5.4.4

MAHC 4.5.4.6

Stair Risers

Stair risers shall have a minimum uniform height of 6 inches (15.2 cm) and a maximum height of 12 inches (30.5 cm), with a tolerance of ½ inches (12.7 mm) between adjacent risers.

What we inspect

Stair risers 6-12 inches high, uniform within 1/2 inch

We measure the height of each stair riser and how consistent they are step to step.

Must be: Risers must be between 6 and 12 inches tall, with no more than a half-inch difference between adjacent steps.

If it fails: Rebuild or shim uneven risers so each step's height stays within a half-inch of the one next to it.

MAHC 4.5.4.6

MAHC 4.5.4.7

Top Surface

The top surface of the uppermost stair tread shall be located not more than 12 inches (30.5 cm) below the POOL coping or DECK.

What we inspect

Uppermost stair tread no more than 12 inches below deck

We measure how far the top stair step sits below the pool deck.

Must be: The top of the highest stair tread must be no more than 12 inches below the coping or deck.

MAHC 4.5.4.7

MAHC 4.5.5.3A

Upper Railing

The upper railing surface of handrails shall extend above the POOL coping or DECK a minimum of 28 inches (71.1 cm).

What we inspect

Handrail top surface extends at least 28 inches above deck

We measure how high the stair handrail extends above the pool deck.

Must be: The top of the handrail must reach at least 28 inches above the coping or deck.

If it fails: Extend or replace the handrail so it reaches at least 28 inches above deck level.

MAHC 4.5.5.3A

MAHC 4.5.5.4

Wider Than Five Feet

Stairs wider than 5 feet (1.5

What we inspect

Stairs wider than 5 feet require handrails at both sides, 12-foot spacing

We check the number and spacing of handrails on wide pool stairs.

Must be: Stairs wider than 5 feet need handrails on both sides, with additional rails spaced no more than every 12 feet across the width.

If it fails: Add handrails so no more than 12 feet separates them across the width of wide stairs.

MAHC 4.5.5.4

m) shall have handrails at either side and spaced not more than every 12 feet (3.7
m) apart across the entire stair width.
MAHC 4.5.6.4

Clear Space

The horizontal clear space between grab rails shall be not less than 18 inches (45.7 cm) and not more than 24 inches (61.0 cm).

What we inspect

Grab rail clear space between 18 and 24 inches

We measure the gap between grab rails at recessed pool steps.

Must be: The open space between grab rails must be between 18 and 24 inches.

MAHC 4.5.6.4

MAHC 4.5.7.5

Uniformly Spaced

R ECESSED STEPS shall be uniformly spaced not less than 6 inches (15.2 cm) and not more than 12 inches (30.5 cm) vertically along the POOL wall.

What we inspect

Recessed steps uniformly spaced 6-12 inches vertically

We measure the vertical spacing between recessed steps built into the pool wall.

Must be: Recessed steps must be evenly spaced between 6 and 12 inches apart, top to bottom.

MAHC 4.5.7.5

MAHC 4.5.8.2.2

Clear Space

The horizontal clear space between handrails shall be not less than 17 inches (43.2 cm) and not more than 24 inches (61.0 cm).

What we inspect

Ladder handrail clear space between 17 and 24 inches

We measure the gap between the pool ladder's handrails.

Must be: The open space between ladder handrails must be between 17 and 24 inches.

MAHC 4.5.8.2.2

MAHC 4.5.8.3.2

Tread Depth

Ladder treads shall have a minimum horizontal tread depth of 1.5 inches (3.8 cm).

What we inspect

Ladder tread minimum horizontal depth 1.5 inches

We measure the depth of the pool ladder's rungs and their distance from the wall.

Must be: Each ladder rung must be at least 1.5 inches deep and no more than 4 inches from the pool wall.

MAHC 4.5.8.3.2

MAHC 4.5.9.2

Maximum Floor Slope

ZERO DEPTH ENTRIES shall have a maximum floor slope of 1:12, consistent with the requirements of MAHC 4.5.2.1.

What we inspect

Zero depth entries limited to 1:12 maximum floor slope

We check the slope of a zero-depth, walk-in pool entry.

Must be: A zero-depth entry can slope no more than 1 foot down for every 12 feet across.

MAHC 4.5.9.2

MAHC 4.5.9.4

Rope and Float Line

Where the bottom of a POOL slopes from a ZERO DEPTH ENTRY to water depths greater than 3 feet (0.9

What we inspect

Rope and float line required at 3-foot depth break from zero depth entries

We check whether a rope and float line separates the toddler wading area from deeper water.

Must be: If the pool slopes from a walk-in entry into water deeper than 3 feet and has a toddler wading area, a rope and float line must mark that 3-foot depth.

If it fails: Install a rope and float line at the 3-foot depth mark to separate the wading area from deeper water.

MAHC 4.5.9.4

m) and includes an area for young non-swimmers to wade and play, a ROPE AND FLOAT LINE shall be installed at the 3 feet (0.9
m) depth to provide a visual and physical separation between the area for toddlers and young non-swimmers and the deeper areas of the POOL.
MAHC 4.6.1.3A

Light Levels

P OOL water surface and DECK light levels shall meet the following minimum maintained light levels:

What we inspect

Min light levels: 30 fc indoor water, 10 fc outdoor water/deck

We check the brightness of the lighting over the water and deck.

Must be: Indoor water needs at least 30 footcandles of light; outdoor water and the deck need at least 10 footcandles.

If it fails: Add or upgrade lighting fixtures to reach the required brightness.

MAHC 4.6.1.3A

1) Indoor Water Surface: 30 horizontal footcandles (323 lux).
2) Outdoor Water Surface: 10 horizontal footcandles (108 lux).
3) DECK: 10 horizontal footcandles (108 lux).
MAHC 4.6.1.5.1A

Minimum Requirements

Underwater lighting, where provided, shall be not less than eight initial rated lumens per square foot of POOL water surface area.

What we inspect

Underwater lighting must provide at least 8 initial rated lumens per square foot

We check the brightness of any underwater pool lights.

Must be: Underwater lights must provide at least 8 initial rated lumens for every square foot of the pool's water surface.

If it fails: Upgrade to brighter underwater light fixtures sized for your pool's surface area.

MAHC 4.6.1.5.1A

MAHC 4.6.1.5.2

Dimmable Lighting

Dimmable lighting shall not be used for underwater lighting.

What we inspect

Dimmable lighting prohibited for underwater lights

We check whether the underwater lights are on a dimmer.

Must be: Underwater lights must not be dimmable.

If it fails: Replace the dimmer switch with a standard on/off control for the underwater lights.

MAHC 4.6.1.5.2

MAHC 4.6.1.6.1A

Minimum Requirements

Where outdoor POOLS are open for use from 30 minutes before sunset to 30 minutes after sunrise, or during periods of low illumination, underwater lighting may be excluded where:

What we inspect

Night swim w/o underwater lighting needs 15 fc surface lighting

We check the surface lighting for pools that are used at night without underwater lights.

Must be: Surface lighting must be at least 15 footcandles, bright enough to clearly see the bottom and drains.

If it fails: Add stronger deck or overhead lighting so the pool bottom and drains stay clearly visible at night.

MAHC 4.6.1.6.1A

1) Maintained POOL surface lighting levels are a minimum of 15 horizontal footcandles (161 lux), and
2) All portions of the POOL, including the bottom and drain(s), are readily visible as required in MAHC 5.7.6.1.
MAHC 4.6.1.7.2

Footcandles

The path of egress shall be illuminated to at least a value of 0.5 footcandles (5.4 lux).

What we inspect

Emergency egress path lighting min 0.5 footcandles

We check the lighting along the walkway used to exit the pool area.

Must be: The exit path must be lit to at least 0.5 footcandles, a dim but visible level.

If it fails: Add a low-level path or landscape light along the exit route.

MAHC 4.6.1.7.2

MAHC 4.6.2.7.13A

Air Handling System Filters

The AIR HANDLING SYSTEM design shall include filters for outdoor air and recirculated air with a MERV rating of 8.

What we inspect

Air handling system filters must have a MERV 8 rating

We check the air filters used in the indoor pool's ventilation system.

Must be: Filters for outdoor and recirculated air must be rated MERV 8 or higher.

If it fails: Replace the air handling filters with MERV 8-rated filters.

MAHC 4.6.2.7.13A

MAHC 4.6.2.7.3A

System Alarm

The AIR HANDLING SYSTEM design shall provide system features to notify the operator if the outdoor air flow rate entering the INDOOR AQUATIC FACILITY is below 0.48 cfm/ft2 (1.8 m3/h) or the minimum amount as designated by the DESIGN PROFESSIONAL for each applicable mode of operation (e.g., occupied normal mode, occupied meet mode, unoccupied mode).

What we inspect

Air handling system must alarm if outdoor air flow drops below 0.48 cfm/sq ft

We check that the ventilation system alerts staff when fresh air flow drops too low.

Must be: The system must notify someone if outdoor air flow falls below 0.48 cubic feet per minute per square foot of pool area.

If it fails: Add a low-airflow alarm or sensor to the ventilation system.

MAHC 4.6.2.7.3A

MAHC 4.6.4.1A

High Temperature

When designing POOL heating equipment, measures shall be taken to prevent BATHER exposure to water temperatures in excess of 104°F (40°C).

What we inspect

Pool heating equipment must not allow bather exposure above 104F

We check that your pool's heating system has a safeguard to keep water from getting hotter than 104°F.

Must be: Heating equipment must be designed so bathers can never be exposed to water above 104°F.

If it fails: Install or repair a high-limit safety control on the heater.

MAHC 4.6.4.1A

MAHC 4.6.4.4.1

Carbon Monoxide Detector

A carbon monoxide detector with local alarming, CERTIFIED, LISTED, AND LABELED in accordance with UL 2075, shall be installed in all such EQUIPMENT ROOMS.

What we inspect

CO detector required in equipment rooms with fuel-burning heaters

We check for a carbon monoxide detector in the equipment room and any adjoining room if you have a gas or fuel-burning pool heater.

Must be: A listed, locally-alarming carbon monoxide detector must be installed in the equipment room and adjoining rooms.

If it fails: Install a UL-listed carbon monoxide detector in the equipment room.

MAHC 4.6.4.4.1

MAHC 4.6.5.1A

Station Design

Design and construction of new AQUATIC FACILITIES shall include an area designated for first aid equipment and/or treatment.

What we inspect

First aid area required for new aquatic facilities

We check for a designated first aid area at the facility.

Must be: New pool facilities must include a space set aside for first aid supplies or treatment.

If it fails: Set up a small first aid station with basic supplies near the pool.

MAHC 4.6.5.1A

MAHC 4.6.6.1

Labeling

Gates and/or doors which will allow egress without a key shall be clearly and conspicuously labeled in letters at least 4 inches (10.2 cm) high "EMERGENCY EXIT."

What we inspect

Emergency exit gates/doors labeled with 4-inch letters

We check the labeling on any gate or door that can be used to exit without a key.

Must be: It must be clearly marked "EMERGENCY EXIT" in letters at least 4 inches tall.

If it fails: Add a properly sized "EMERGENCY EXIT" sign to the gate or door.

MAHC 4.6.6.1

MAHC 4.7.1.10.4A

Reuse Ratio

The ratio of INTERACTIVE WATER PLAY AQUATIC VENUE FEATURE water to filtered water shall be no greater than 3:1.

What we inspect

Interactive water play feature-to-filtered water reuse ratio capped at 3:1

We check how much unfiltered water is being reused in a splash feature compared to filtered water.

Must be: No more than 3 parts of reused, unfiltered water may be mixed with each 1 part of filtered water.

MAHC 4.7.1.10.4A

MAHC 4.7.1.3.1.3.1

Greater Than Fifty Feet Wide

For POOLS greater than 50 feet wide (15.2

What we inspect

Pools wider than 50 feet require floor inlets

We check whether wide pools have water inlets built into the floor, not just the walls.

Must be: Pools wider than 50 feet must include floor inlets to keep the water properly mixed.

If it fails: Have a pool contractor add floor inlets to the circulation system.

MAHC 4.7.1.3.1.3.1

m), floor INLETS shall be required.
MAHC 4.7.1.3.3.3A

Inlet Spacing

Wall INLETS shall be spaced no greater than 20 feet (6.1

What we inspect

Wall inlets spaced no more than 20 feet apart

We check the spacing of the water return jets along the pool walls.

Must be: Wall inlets must be no more than 20 feet apart.

If it fails: Add return inlets so none are more than 20 feet apart.

MAHC 4.7.1.3.3.3A

m) apart.
MAHC 4.7.1.4.2.1

Continuous Water Removal

The gutter system shall be designed to allow continuous removal of water from the POOL’ S upper surface at a rate of at least 125 percent of the total design recirculation flow rate.

What we inspect

Gutter system must remove water at 125% of design recirculation flow rate

We check the capacity of the perimeter gutter system that skims water off the surface.

Must be: The gutter system must remove water at least 25% faster than the pool's normal recirculation rate.

MAHC 4.7.1.4.2.1

MAHC 4.7.1.4.4.1A

Net Surge Capacity

All perimeter overflow systems shall be designed with an effective net surge capacity of not less than one gallon for each square foot (40.7 L/m2) of POOL surface area.

What we inspect

Surge tank net capacity at least 1 gallon per square foot of pool surface

We check the size of the surge tank that holds overflow water from the gutters.

Must be: The surge tank must hold at least 1 gallon of water for every square foot of pool surface area.

MAHC 4.7.1.4.4.1A

Where SKIMMERS are used, at least one surface SKIMMER shall be provided for each 500 square feet (46 m2) of surface area or fraction thereof.

What we inspect

At least one surface skimmer required per 500 square feet of surface area

We count the surface skimmers relative to your pool's size.

Must be: Pools using skimmers need at least one skimmer for every 500 square feet of surface area, or part of it.

If it fails: Add skimmers so there is at least one per 500 square feet of surface.

MAHC 4.7.1.5.1.2A

MAHC 4.7.1.5.1.5

Pool Width Limitations

P OOLS using SKIMMERS shall not exceed 30 feet (9.1

What we inspect

Pools relying on skimmers limited to 30 feet in width

We check whether a skimmer-only pool exceeds the width allowed without a gutter system.

Must be: Pools using skimmers instead of a perimeter gutter system can't be wider than 30 feet.

MAHC 4.7.1.5.1.5

m) in width.
Each SKIMMER shall have a weir that adjusts automatically to variations in water level over a minimum range of 4 inches (10.2 cm).

What we inspect

Skimmer weir must self-adjust over a minimum 4-inch water-level range

We check that the skimmer's floating door adjusts as the water level rises and falls.

Must be: Each skimmer weir must automatically adjust over at least a 4-inch range of water level.

If it fails: Replace a stuck or worn skimmer weir so it floats and adjusts freely.

MAHC 4.7.1.5.4.1

Submerged suction outlet fitting assemblies (SOFAs), shall be CERTIFIED, LISTED, AND LABELED to the requirements of ANSI/APSP/ICC-16 2017 and shall be installed in accordance with the SOFA specific installation instructions, including minimum sump depth, pipe size(s), adapters frames, structural supports, and fasteners.

What we inspect

SOFAs must be ANSI/APSP/ICC-16 listed, installed per instructions

We check that your pool's main drain covers are certified anti-entrapment fittings installed correctly.

Must be: Drain covers must be certified to the applicable safety standard and installed exactly per the manufacturer's instructions.

If it fails: Replace non-compliant or improperly installed drain covers with certified ones, installed to spec.

MAHC 4.7.1.6.1A

MAHC 4.7.1.6.2

Number and Location

SOFAs labeled as blockable shall be installed with a minimum of two fittings. SOFAs labeled unblockable shall be installed with one or more fittings, except for those installed and used as ANSI/APSP/ICC-16 Maintenance Drains or Fire Suppression Source Outlets (ref. 1.2.2), which may be a single outlet.

What we inspect

Blockable SOFA systems require minimum two fittings

We check whether your main drains have enough separate fittings to prevent entrapment if one gets blocked.

Must be: If the drain covers can be blocked by a body, there must be at least two separate drain fittings; unblockable types may use just one.

If it fails: Add a second main drain fitting if the current covers are a blockable type.

MAHC 4.7.1.6.2

MAHC 4.7.1.7.2.1A

Discharge Piping

R ECIRCULATION SYSTEM piping shall be designed so that water velocities do not exceed 8 feet (2.4

What we inspect

Recirculation discharge piping velocity limited to 8 feet per second

We check the flow speed of water moving through the return piping from the pump.

Must be: Water in the return piping must not move faster than 8 feet per second.

If it fails: Have a pool professional resize the return piping if the flow is too fast.

MAHC 4.7.1.7.2.1A

m) per second on the discharge side of the recirculation pump unless alternative values have proper engineering justification.
MAHC 4.7.1.7.2.2A

Suction Piping

Suction piping shall be sized so that the water velocity does not exceed 6 feet per second (1.8 m/s) unless alternative values have proper engineering justification.

What we inspect

Suction piping velocity limited to 6 feet per second

We check the flow speed of water being pulled into the pump through the suction lines.

Must be: Water in the suction piping must not move faster than 6 feet per second.

If it fails: Have a pool professional resize the suction piping if the flow is too fast.

MAHC 4.7.1.7.2.2A

Suction and supply AQUATIC VENUE piping shall be able to maintain the greater of the two following amounts of pressure:

What we inspect

Piping pressure test min: 25% over design pressure or 25 psi

We check that the pool's plumbing was pressure-tested to a safe margin above normal operating pressure.

Must be: Piping must hold pressure at least 25% above normal operating pressure, or 25 psi, whichever is higher.

MAHC 4.7.1.7.5.2

1) 25% greater than the maximum design operating pressure of the system or
2) 25 psi (172 KPa).
The vacuum limit switch shall be set for a maximum vacuum of 18 inches (45.7 cm) of mercury.

What we inspect

Vacuum limit switch set to maximum 18 inches of mercury

We check the setting of the vacuum limit switch that protects your filter pump.

Must be: The vacuum limit switch must be set to shut off at no more than 18 inches of mercury.

If it fails: Have a technician adjust the vacuum limit switch to the correct setting.

MAHC 4.7.1.8.2.5

MAHC 4.7.1.9.1A

Flow Meters

A flow meter accurate to within +/- 5% of the actual design flow shall be provided for each filtration system.

What we inspect

Flow meter accuracy within 5% of actual design flow required

We check that your filtration system has an accurate flow meter.

Must be: Each filtration system needs a flow meter accurate within 5% of the actual design flow.

If it fails: Install or recalibrate a flow meter if one is missing or inaccurate.

MAHC 4.7.1.9.1A

MAHC 4.7.2.2.3.1.1

Less Than Twenty-four Inch Bed Depth

When a bed depth is less than 24 inches (61 cm) of media depth as measured from the top of the filter media bed without flow to the top of the laterals, nozzles, or similar system of retaining media inside the filter, filters shall be designed to operate at no more than 12 GPM per square foot (29 m/h).

What we inspect

Granular filters with less than 24-inch bed limited to 12 GPM/sq ft

We check the flow rate through your granular filter given the depth of its filter media.

Must be: A granular filter with less than 24 inches of media must run no faster than 12 gallons per minute per square foot.

MAHC 4.7.2.2.3.1.1

High-rate granular media filters shall be designed to operate at no more than 15 GPM per square foot (37 m/h) when a minimum bed depth of 24 inches (61 cm) of media depth as measured from the top of the filter media bed without flow to the top of the laterals, nozzles, or similar system of retaining media inside the filter.

What we inspect

High-rate granular media filters limited to 15 GPM/sq ft with 24-inch bed

We check the flow rate through your high-rate sand or media filter relative to its size.

Must be: A high-rate granular filter with at least 24 inches of media must run no faster than 15 gallons per minute per square foot.

MAHC 4.7.2.2.3.1A

MAHC 4.7.2.2.3.2A

Backwash System Design

The granular media filter system shall be designed to backwash each filter at a rate of at least 15 GPM per square foot (37 m/h) of filter bed surface area, unless explicitly prohibited by the filter manufacturer and approved at an alternate rate as specified in their NSF/ANSI 50 listing.

What we inspect

Granular media filter backwash rate at least 15 GPM/sq ft

We check the flow rate used when backwashing (cleaning) your granular filter.

Must be: The filter must backwash at a rate of at least 15 gallons per minute per square foot, unless the manufacturer specifies otherwise.

MAHC 4.7.2.2.3.2A

MAHC 4.7.2.3.1.1

Vacuum Precoat

The design filtration rate for vacuum precoat filters shall not be greater than either:

What we inspect

Vacuum precoat filters limited to 2 GPM/sq ft (2.5 with continuous body-feed)

We check the flow rate through a vacuum (DE) filter relative to its size.

Must be: A vacuum precoat filter must run no faster than 2 gallons per minute per square foot, or 2.5 with continuous precoat feed.

MAHC 4.7.2.3.1.1

1) 2 GPM per square foot (4.9 m/h) or
2) 2.5 GPM per square foot (6.1 m/h) when used with a continuous precoat media feed (commonly referred to as “body-feed”).
MAHC 4.7.2.4.1A

Filtration Rates

The design filtration rate for surface-type cartridge filter shall not exceed 0.30 GPM per square foot (0.20 L/s/m2).

What we inspect

Surface-type cartridge filters limited to 0.30 GPM/sq ft

We check the flow rate through your cartridge filter relative to its surface area.

Must be: A cartridge filter must run no faster than 0.30 gallons per minute per square foot.

If it fails: Add filter area or upsize the cartridge filter to slow the flow rate.

MAHC 4.7.2.4.1A

MAHC 4.7.3.2.1.3

Interlock Controls and No or Low Flow Deactivation

For all new or SUBSTANTIALLY RENOVATED AQUATIC VENUES and within 1 year of adoption of this CODE for existing facilities, all chemical control and feed systems shall be provided with an automatic means to disable all chemical feeders for each VENUE or portion of a VENUE in the event of a low flow or no flow condition. This shall be accomplished through an electrical interlock consisting of at least two of the following:

What we inspect

Chemical feeders must disable automatically on low/no flow

We check that your chemical feed system automatically shuts off if water stops flowing.

Must be: Chemical feeders must automatically turn off during low- or no-flow conditions, using at least two independent safety checks.

If it fails: Have a technician install or repair the flow-safety interlock on the chemical feeders.

MAHC 4.7.3.2.1.3

1) Recirculation pump power monitor,
2) Flow meter/flow switch/pressure switch in the return line, or
3) Flow meter/flow switch at the chemical controller.
MAHC 4.7.3.2.4.1

Prohibited for New Construction

Use of compressed CHLORINE gas shall be prohibited for new construction and after SUBSTANTIAL ALTERATION to existing AQUATIC FACILITIES .

What we inspect

Compressed chlorine gas prohibited for new construction

We check what type of chlorine feed system your pool uses.

Must be: New or newly renovated pools can't use compressed chlorine gas for disinfection.

If it fails: Switch to a liquid, tablet, or salt-based chlorine feed system.

MAHC 4.7.3.2.4.1

MAHC 4.7.3.2.5.3

Gas Feed Systems

Carbon dioxide and ozone are the only gas feed systems permitted in AQUATIC FACILITIES .

What we inspect

Only carbon dioxide and ozone gas feed systems are permitted

We check which gas-based chemical feed systems, if any, your pool uses.

Must be: Only carbon dioxide and ozone are allowed as gas feed systems; other gases aren't permitted.

MAHC 4.7.3.2.5.3

MAHC 4.7.3.2.6.4

Tds Readout

Electrolytic generators shall have a TDS or salt (NaCl) readout and a low salt indicator.

What we inspect

Electrolytic generators need TDS/salt readout and low-salt alarm

We check that your salt chlorine generator displays the salt level and warns when it's too low.

Must be: Salt chlorine generators must show a salt (or TDS) reading and include a low-salt warning indicator.

If it fails: Repair or replace the generator's display if the readout or low-salt alert isn't working.

MAHC 4.7.3.2.6.4

AUTOMATED CONTROLLERS shall be installed for MONITORING and turning on or off chemical feeders used for pH and disinfectants at all AQUATIC VENUES .

What we inspect

Automated controllers required for pH and disinfectant feeders

We check that your pH and sanitizer feeders are run by automated controllers rather than manual dosing alone.

Must be: An automated controller must monitor and switch the pH and disinfectant feeders on and off.

If it fails: Install an automated chemical controller for pH and disinfectant feed.

MAHC 4.7.3.2.8.1A

MAHC 4.7.3.3.1.2A

Required Facilities

The new construction or SUBSTANTIAL ALTERATION of the following INCREASED RISK AQUATIC VENUES shall be required to use a SECONDARY TREATMENT after adoption of this CODE:

What we inspect

Secondary treatment required for wading pools, interactive play, therapy pools

We check whether higher-risk pools like wading pools, splash pads, and therapy pools have backup disinfection.

Must be: Newly built or renovated wading pools, interactive water play areas, and therapy pools must include secondary treatment such as UV or ozone.

If it fails: Add a secondary treatment system, such as UV or ozone, to the circulation system.

MAHC 4.7.3.3.1.2A

3) AQUATIC VENUES designed primarily for children under 5 years old, such as
a) Wading pools
b) INTERACTIVE WATER PLAY VENUES with no standing water, and
4) Therapy pools.
MAHC 4.7.3.3.2.1A

Log Inactivation

S ECONDARY TREATMENT shall be designed to achieve a minimum 3-log (99.9%) reduction in the number of infective Cryptosporidium OOCYSTS per pass through the SECONDARY TREATMENT for INTERACTIVE WATER PLAY AQUATIC VENUES and a minimum 2-log (99%) reduction per pass for all other AQUATIC VENUES . Each SECONDARY TREATMENT may be composed of multiple treatment processes or steps that result in the total required reduction in the number of infective Cryptosporidium OOCYSTS per pass through the SECONDARY TREATMENT.

What we inspect

Secondary treatment: 3-log reduction for interactive play, 2-log others

We check whether the secondary treatment system is strong enough to knock out Cryptosporidium.

Must be: Secondary treatment must remove at least 99.9% of Cryptosporidium for splash pads and at least 99% for other required pools.

MAHC 4.7.3.3.2.1A

MAHC 4.7.3.3.4.2A

Onsite Measurement

Ozone systems shall be designed to measure the concentration of ozone at a minimum of two sampling locations to determine the CT INACTIVATION VALUE achieved in the treatment system prior to return of the water to the AQUATIC VENUE or AQUATIC FEATURE recirculation treatment loop. A CT INACTIVATION VALUE of 4.9 ppm (mg/L)*min is required for 99% (2 -log) Cryptosporidium reduction at a water temperature of 77°F /25° C (or 7.4 ppm [mg/L]*min is required for 99.9% [3 -log] Cryptosporidium reduction at a water temperature of 77°F/25° C).

What we inspect

Ozone secondary treatment CT value: 4.9 (2-log) or 7.4 (3-log) ppm*min

We check that an ozone treatment system is dosed strongly enough to be effective.

Must be: Ozone treatment must reach a strength of at least 4.9 (for 99% reduction) or 7.4 (for 99.9% reduction) at 77°F water temperature.

MAHC 4.7.3.3.4.2A

The WATER REPLENISHMENT SYSTEM shall be designed to discharge (or treat and reuse via a separate treatment system capable of removing compounds specified in MAHC 4.7.4.1.1) AQUATIC VENUE water at a rate of at least 4 gallons (15 L) per BATHER per day per AQUATIC VENUE.

What we inspect

Water replenishment system must discharge at least 4 gallons per bather per day

We check that your pool's water replenishment (fill/dilution) system can add enough fresh water for the number of swimmers it serves.

Must be: The system must be able to add at least 4 gallons of fresh water per swimmer per day.

MAHC 4.7.4.1.2A

MAHC 4.7.5.2.1

Maximum Allowable

All SPAS shall be designed to have a maximum allowable TURNOVER TIME of 0.5 hour or less.

What we inspect

Spas must have maximum turnover time of 0.5 hours

We check how quickly the spa's pump and filter cycle its entire volume of water.

Must be: The spa's full volume of water must be able to filter through completely in 30 minutes or less.

If it fails: Upgrade the pump or plumbing so the full spa volume can circulate within 30 minutes.

MAHC 4.7.5.2.1

MAHC 4.8.1.1.2

Joints or Gaps

Conditions between adjacent DECK materials, components, and concrete pours shall not have horizontal open joints or gaps larger than 3/16 inches wide (4.8 mm).

What we inspect

Deck joints/gaps limited to 3/16 inch maximum width

We check the gaps between deck sections and pavers around the pool.

Must be: Joints between deck materials must be no wider than 3/16 inch.

If it fails: Fill or re-caulk wide gaps between deck sections to bring them within tolerance.

MAHC 4.8.1.1.2

MAHC 4.8.1.3.5

Drain Covers

Drain covers shall be suitable for bare foot traffic with openings no greater than ½ inch (1.3 cm) and easily removable with a simple tool to facilitate regular cleaning.

What we inspect

Deck drain covers limited to 1/2 inch openings

We check the openings in the deck's drain covers.

Must be: Drain cover openings must be no wider than 1/2 inch, and the cover must be easily removable for cleaning.

If it fails: Replace drain covers with narrower-slot, bare-foot-safe covers.

MAHC 4.8.1.3.5

MAHC 4.8.1.4.2A

Slip Resistant

All DECKS shall have SLIP -RESISTANT, textured finishes, which are not conducive to slipping under contact of bare feet in wet or dry conditions.

What we inspect

Deck surfaces must be slip-resistant, textured finishes

We check the texture of the deck surface for slip resistance.

Must be: The deck must have a slip-resistant, textured finish, even when wet.

If it fails: Apply a non-slip coating or resurface the deck with a textured finish.

MAHC 4.8.1.4.2A

Carpet and artificial turf shall be prohibited materials for PERIMETER DECK and POOL DECK .

What we inspect

Carpet and artificial turf prohibited on perimeter/pool deck

We check the deck surface material around the pool.

Must be: Carpet and artificial turf are not allowed anywhere on the pool deck.

If it fails: Remove any carpet or artificial turf and replace it with an approved slip-resistant deck material.

MAHC 4.8.1.4.3A

Wood shall be a prohibited material for use as PERIMETER DECK.

What we inspect

Wood prohibited as perimeter deck material

We check whether the deck immediately surrounding the pool is made of wood.

Must be: Wood cannot be used as the perimeter deck material, though it's fine for a separate dry deck area farther away.

If it fails: Replace wood decking closest to the pool with an approved slip-resistant material like concrete or pavers.

MAHC 4.8.1.4.4A

P ERIMETER DECKS shall be 4 feet (1.2

What we inspect

Perimeter deck must be at least 4 feet of unobstructed width

We check the clear walking width of the deck around the pool.

Must be: The unobstructed deck must be at least 4 feet wide all the way around.

If it fails: Remove obstructions or extend the deck so there's a clear 4-foot path around the pool.

MAHC 4.8.1.5.1.1A

m) minimum in unobstructed width around the POOL perimeter as prescribed in this section.
MAHC 4.8.1.7.7

Minimum Clearance

All bridges spanning a POOL or any other structures not intended for INTERACTIVE PLAY shall have a minimum clearance of 7 feet (2.1

What we inspect

Bridges over a pool require minimum 7 feet clearance above pool bottom

We check the headroom under any bridge crossing over the pool.

Must be: There must be at least 7 feet of clearance from the pool bottom to the bridge structure.

MAHC 4.8.1.7.7

m) from the bottom of the POOL to any structure overhead.
MAHC 4.8.1.7.8

Guard Rails

Any bridge shall have a minimum 42 inch (1.1

What we inspect

Bridge guard rails must be at least 42 inches high on both sides

We check the guard rails on both sides of any bridge over the pool.

Must be: Rails must be at least 42 inches high on both sides.

If it fails: Raise or add guard rails to 42 inches on both sides of the bridge.

MAHC 4.8.1.7.8

m) high BARRIER on both sides.
MAHC 4.8.2.2.1

Higher Than Twenty-one Inches

Diving stands higher than 21 inches (53.3 cm) measured from the DECK to the top of the butt end of the board or platform shall have steps or a ladder and handrails.

What we inspect

Diving stands over 21 inches high require steps/ladder and handrails

We check whether tall diving boards or platforms have safe access.

Must be: Diving stands taller than 21 inches must have steps or a ladder with handrails.

If it fails: Add a ladder or steps with handrails to the diving stand.

MAHC 4.8.2.2.1

MAHC 4.8.2.2.3

Short Platforms

Diving stands or platforms that are 1 meter (3.4 ft) or higher shall be protected with guard rails at least 30 inches (76.2 cm) above the board, extending at least to the edge of the water along with intermediate rails.

What we inspect

1-meter diving platforms require guard rails at least 30 inches above the board

We check the guard rails on diving platforms about waist-high or taller.

Must be: Platforms 1 meter (about 3.3 feet) or higher need guard rails at least 30 inches above the board, reaching to the water's edge with a middle rail.

MAHC 4.8.2.2.3

MAHC 4.8.2.2.4A

Tall Platforms

Diving stands or platforms that are 2 meters (6.6 ft) or higher shall have guard rails with the top rail at least 36 inches (0.9

What we inspect

2-meter diving platforms require guard rail 36 in above board

We check the guard rails on taller diving platforms.

Must be: Platforms 2 meters (about 6.6 feet) or higher need a top guard rail at least 36 inches above the board plus a second rail about halfway up.

MAHC 4.8.2.2.4A

m) above the board and a second rail approximately half the distance from the platform to the upper rail. Table 4.8.2.2: Diving Board Height and Dimensions Diving Board Height 1.64 ft. (0.5
m) 2.46 ft. (0.75
m) 3.28 ft. (1.0
m) 3.84 ft. (3.0
m) Diving Board Length 10.0 ft. (3.05
m) 12.0 ft. (3.66
m) 16.0 ft. (4.88
m) 16.0 ft. (4.88
m) Diving Board Width 20.0 in. (50.8 cm) 20.0 in. (50.8 cm) 20.0 in. (50.8 cm) 20.0 in. (50.8 cm) Table 4.8.2.3: Minimum Dimensions of Components Related to Diving Wells by Diving Board Height *Letters refer to MAHC Figures 4.8.2.2.1 & 4.8.2.2.2 Ref* Diving Board Height Minimum Dimension
MAHC 4.8.3.2

Minimum Water Depth

Starting platforms shall be installed in a minimum water depth of 4 feet (1.25

What we inspect

Starting platforms require minimum 6 feet water depth (new construction)

We measure the water depth beneath racing starting platforms.

Must be: Starting platforms must sit over water at least 6 feet deep for new construction, or 4 feet for older installations.

MAHC 4.8.3.2

m), except for new construction, where starting platforms shall be installed in a minimum water depth of 6 feet (1.8
m).
MAHC 4.8.3.3

Leading Edge

The leading edge of starting platforms shall have a maximum height of 30 inches (76.2 cm) above the water surface.

What we inspect

Starting platform leading edge maximum 30 inches above water surface

We measure how high the front edge of a starting platform sits above the water.

Must be: The leading edge of a starting platform must be no more than 30 inches above the water surface.

If it fails: Lower or adjust the platform so its edge sits no higher than 30 inches above the water.

MAHC 4.8.3.3

MAHC 4.8.5.2.1A

Emergency Communication Equipment

The AQUATIC FACILITY or each AQUATIC VENUE, as necessary, shall have a functional telephone or other communication device that is hard wired and capable of directly dialing 911 or function as the emergency notification system.

What we inspect

Emergency device capable of dialing 911 required at facility

We check for a working, hard-wired phone or device near the pool that can dial 911.

Must be: A functional 911-capable communication device must be conspicuously placed at the pool.

If it fails: Install a hard-wired phone or emergency call device within easy reach of the pool.

MAHC 4.8.5.2.1A

MAHC 4.8.6.2.1.1

Horizontal Mid-rails

Horizontal mid-rails shall not be permitted.

What we inspect

Horizontal mid-rails not permitted on climbable enclosures

We check the fence design for horizontal rails a child could use as footholds to climb.

Must be: The fence must not have horizontal mid-rails that make it climbable.

If it fails: Remove or reposition horizontal rails, or switch to a fence style without climbable footholds.

MAHC 4.8.6.2.1.1

MAHC 4.8.6.2.1.2

Mesh Fencing

Chain-link fencing constructed of a 1¼ inches (31.7 mm) mesh and limiting the maximum opening to 1 ¾ inches (44.4 mm) mesh shall be permitted.

What we inspect

Chain-link enclosure mesh limited to 1.75-inch maximum opening

We check the size of the openings in any chain-link pool fence.

Must be: Chain-link mesh openings must be no larger than 1.75 inches.

If it fails: Replace the chain-link fencing with a smaller-mesh (1.25-inch) chain-link product.

MAHC 4.8.6.2.1.2

Windows on a building that forms part of an ENCLOSURE around an AQUATIC VENUE shall have a maximum opening width not to exceed 4 inches (10.2 cm).

What we inspect

Enclosure building windows limited to 4-inch maximum opening width

We check how far any windows that form part of the pool enclosure can open.

Must be: Windows must open no more than 4 inches wide, or have a fixed screen if they open further.

If it fails: Install window stops or a non-removable screen limiting the opening to 4 inches.

MAHC 4.8.6.2.3

Barriers Not Serving as Part of an Enclosure Except where otherwise noted, all other BARRIERS not serving as part of an AQUATIC FACILITY ENCLOSURE shall not be less than 42 inches (1.1

What we inspect

Barriers not part of facility enclosure must be at least 42 in high

We check the height of any other barriers around the pool area that aren't part of the main enclosure.

Must be: These barriers must be at least 42 inches tall.

If it fails: Raise or replace the barrier so it stands at least 42 inches high.

MAHC 4.8.6.2.4.3A

m) in height.
AQUATIC FACILITY ENCLOSURES shall be no less than 6 feet (1.83

What we inspect

Aquatic facility enclosure must be at least 6 feet high

We check the height of the fence or wall enclosing your pool area.

Must be: The enclosure must be at least 6 feet tall.

If it fails: Add fence extensions or replace panels to bring the enclosure up to 6 feet.

MAHC 4.8.6.2.4A

m) in height.
MAHC 4.8.6.2.5

Clearance Above Grade

The maximum vertical clearance at the bottom of the AQUATIC VENUE OR AQUATIC FACILITY ENCLOSURE when measured on the side of the ENCLOSURE facing away from the enclosed space, shall not exceed:

What we inspect

Max clearance below enclosure: 2 in non-solid, 4 in solid surface

We check the gap between the bottom of the pool fence and the ground.

Must be: The gap must be no more than 2 inches over grass or gravel, or 4 inches over a solid surface like concrete.

If it fails: Add a bottom rail, mulch, or grading to close the gap under the fence.

MAHC 4.8.6.2.5

1) 2 inches (5.1 cm) above grade when the ENCLOSURE rests on a non-solid surface, including grass or gravel or
2) 4 inches (10.2 cm) above grade when the ENCLOSURE rests on a solid surface.
MAHC 4.8.6.3.1

Self-closing and Latching

All primary public access gates or doors serving as part of an AQUATIC FACILITY ENCLOSURE or required AQUATIC VENUE ENCLOSURE shall be self-closing and self- latching from any open position.

What we inspect

Primary access gates/doors must be self-closing and self-latching

We check that the main pool gates and doors close and lock themselves.

Must be: Every gate or door used for pool access must close and latch on its own from any open position.

If it fails: Install a self-closing hinge and self-latching mechanism on the gate.

MAHC 4.8.6.3.1

MAHC 4.8.6.3.1.1A

Self-latching Device Height

Operable parts of the release latch on self-latching devices shall be located 4.5 feet (1.4

What we inspect

Gate self-latching release device must be located 4.5 feet above finished grade

We check the height of the gate's latch release.

Must be: The release for the self-latching device must sit exactly 4.5 feet above the ground.

If it fails: Reposition the latch hardware to 4.5 feet above grade.

MAHC 4.8.6.3.1.1A

m) above finished grade.
MAHC 4.8.6.3.1.2

Operable by Children

Self-latching devices shall not be operable by small children on the outside of the ENCLOSURE around the AQUATIC VENUE.

What we inspect

Self-latching gate devices must not be operable by small children from outside

We check whether a small child could reach or work the gate latch from outside the pool area.

Must be: The latch release must not be operable by small children from outside the enclosure.

If it fails: Move the latch out of reach or add a shielded, child-resistant release mechanism.

MAHC 4.8.6.3.1.2

MAHC 4.8.6.3.6

Absence of Building Codes

Where local, state, territorial, federal, and tribal building CODES do not otherwise govern, at least one 36-inch (91.4 cm) wide EXIT GATE shall be required for emergency access to each logical AQUATIC VENUE area including individual POOLS or grade levels or both.

What we inspect

Min one 36-in exit gate per venue area absent local building code

We check for at least one wide gate for emergency access into the pool area.

Must be: At least one exit gate must be 36 inches wide, unless local building codes say otherwise.

If it fails: Widen or add a gate that measures at least 36 inches across.

MAHC 4.8.6.3.6

MAHC 4.8.6.4.4A

Wall Separating

For a passage through a wall separating the indoor portion of an AQUATIC VENUE from an outdoor portion of the same AQUATIC VENUE, the overhead clearance of the passage to the AQUATIC VENUE floor shall be at least 6 feet 8 inches (2.0

What we inspect

Indoor/outdoor pool wall passage requires 6 feet 8 inch overhead clearance

We check the headroom over any passage connecting an indoor and outdoor section of the same pool.

Must be: The overhead clearance must be at least 6 feet 8 inches to any solid structure above.

If it fails: Raise or modify the overhead structure to provide 6 feet 8 inches of clearance.

MAHC 4.8.6.4.4A

m) to any solid structure overhead.
MAHC 4.8.7.1A

No Hazard

The cleaning system provided shall not create an entanglement or suction entrapment hazard or interfere with the operation or use of the AQUATIC VENUE.

What we inspect

Pool cleaning systems must not create entanglement or suction entrapment hazards

We check your pool cleaning equipment for entanglement or suction entrapment hazards.

Must be: Any cleaning system must not pose a risk of entangling swimmers or trapping them by suction.

If it fails: Remove or replace cleaning equipment that creates a suction or entanglement hazard.

MAHC 4.8.7.1A

MAHC 4.8.7.3

Integral Vacuum Systems

Use of integral vacuum systems, meaning a vacuum system that uses the main circulating pump or a dedicated vacuum pump connect to the POOL with PVC piping and terminating at the POOL with a flush-mounted vacuum port fitting, shall be prohibited.

What we inspect

Integral pool vacuum systems are prohibited

We check whether your pool has a built-in vacuum system connected to a flush-mounted port.

Must be: Built-in vacuum systems that connect through a flush-mounted pool port aren't allowed.

If it fails: Cap off the built-in vacuum port and use a portable vacuum system instead.

MAHC 4.8.7.3

MAHC 4.8.7.4

Gfci Power

Where used, PORTABLE VACUUM cleaning equipment shall be powered by circuits having GROUND - FAULT CIRCUIT INTERRUPTERS.

What we inspect

Portable pool vacuum equipment must be powered from GFCI-protected circuits

We check that any portable pool vacuum is plugged into a GFCI-protected outlet or circuit.

Must be: Portable vacuum equipment must be powered only through a ground-fault circuit interrupter (GFCI).

If it fails: Plug the vacuum into a GFCI outlet, or have an electrician add GFCI protection to that circuit.

MAHC 4.8.7.4

MAHC 4.8.7.6A

Gfci Connection

Any ROBOTIC CLEANER power supply shall be connected to a circuit equipped with a ground fault interrupter, and shall not be operated using an extension cord.

What we inspect

Robotic pool cleaners must be GFCI-connected and never use an extension cord

We check how the robotic pool cleaner is powered.

Must be: The robotic cleaner must plug directly into a GFCI-protected outlet, with no extension cord in between.

If it fails: Plug the robotic cleaner straight into a nearby GFCI outlet instead of using an extension cord.

MAHC 4.8.7.6A

MAHC 4.9.1.1.1.1

Positive Drainage

The EQUIPMENT ROOM OR AREA floor shall have positive drainage, including a sump drain pump if necessary.

What we inspect

Equipment room floor must have positive drainage

We check that the pump/equipment room floor drains water away properly.

Must be: The equipment room floor must be sloped to drain, using a sump pump if needed, so water doesn't pool.

If it fails: Regrade the floor or add a sump pump so water doesn't collect in the equipment area.

MAHC 4.9.1.1.1.1

EQUIPMENT ROOMS or areas shall be lighted to provide 30 foot candles (323 lux) of illumination at floor level in accordance with IESNA guidelines.

What we inspect

Equipment room lighting must provide 30 footcandles at floor level

We check the lighting level in your pool equipment room.

Must be: The equipment room must be lit to at least 30 footcandles at floor level.

If it fails: Add or upgrade lighting fixtures in the equipment room.

MAHC 4.9.1.2.2

In all CHEMICAL STORAGE SPACES in which POOL chemicals will be STORED, an emergency eyewash station shall be provided.

What we inspect

Emergency eyewash station required in all chemical storage spaces

We check for an emergency eyewash station in every room where pool chemicals are stored.

Must be: An eyewash station must be present in the chemical storage space.

If it fails: Install an emergency eyewash station in the chemical storage area.

MAHC 4.9.2.1.4A

MAHC 4.9.2.10.2A

Emergency Ventilation

Rooms which are designed to include ozone equipment shall be equipped with an emergency ventilation system capable of six air changes per hour.

What we inspect

Ozone equipment rooms require emergency ventilation of 6 air changes per hour

We check the emergency ventilation for any room housing ozone generation equipment.

Must be: The room needs an emergency ventilation system that can exchange its air 6 times per hour, triggered by an ozone alarm or manual switch.

If it fails: Install or upgrade exhaust fans to reach 6 air changes per hour, tied to an ozone-leak alarm.

MAHC 4.9.2.10.2A

In addition to the signs required on all CHEMICAL STORAGE SPACES , a sign shall be posted on the exterior of the entry door, stating “DANGER - GASEOUS OXIDIZER – OZONE” in lettering not less than 4 inches (10.2 cm) high.

What we inspect

Ozone room requires exterior 'DANGER - GASEOUS OXIDIZER - OZONE' sign

We check for a warning sign on the outside of the ozone equipment room door.

Must be: A sign reading "DANGER - GASEOUS OXIDIZER - OZONE" in letters at least 4 inches tall must be posted outside the door.

If it fails: Post the required ozone warning sign on the exterior of the door.

MAHC 4.9.2.10.4

MAHC 4.9.2.11.4

Not Below Grade

A gaseous-chlorination space shall not be located in a basement or otherwise be below grade.

What we inspect

Gaseous chlorination space must not be located below grade

We check the location of any gaseous chlorine storage room.

Must be: The room must be at or above ground level, not in a basement or below-grade space.

If it fails: Relocate gaseous chlorine equipment to a space at or above grade.

MAHC 4.9.2.11.4

MAHC 4.9.2.11.5

Compressed-chlorine Gas

Where installed indoors, compressed-CHLORINE gas STORAGE containers and associated chlorinating equipment shall be in a separate room constructed to have a fire rating of not less than 1-hour.

What we inspect

Compressed chlorine gas storage room requires minimum 1-hour fire rating

We check the construction of the room housing compressed chlorine gas containers, if kept indoors.

Must be: The room must be built with at least a 1-hour fire-resistance rating, separate from other spaces.

If it fails: Have a contractor upgrade the room's walls, door, and ceiling to a 1-hour fire rating.

MAHC 4.9.2.11.5

MAHC 4.9.2.11.8

Ventilation

Indoor gaseous-chlorination spaces shall be provided with a spark-proof ventilation system capable of 60 air changes per hour.

What we inspect

Gaseous chlorination spaces require ventilation of 60 air changes per hour

We check the ventilation in any indoor room where chlorine gas is stored or used.

Must be: The room needs a spark-proof ventilation system that can exchange its air 60 times per hour.

If it fails: Install a dedicated spark-proof exhaust fan sized for 60 air changes per hour.

MAHC 4.9.2.11.8

Exterior CHEMICAL STORAGE SPACES not joined to a wall of a building shall have a complete ENCLOSURE consisting of fencing or other similar constructed feature that is at least 6 feet (1.8

What we inspect

Exterior chemical storage enclosure min 6 ft, non-climbable

We check the fencing around any outdoor chemical storage area that isn't attached to a building.

Must be: The enclosure must be at least 6 feet high and built so it can't easily be climbed.

If it fails: Raise the fence to 6 feet and remove footholds, like horizontal rails, that make it climbable.

MAHC 4.9.2.3.2A

m) high and meets the non-climbability requirements of MAHC 4.8.6.2.1.
Fencing shall be equipped with a self-closing and self-latching gate having a permanent locking device.

What we inspect

Exterior chemical storage gate: self-closing, self-latching, locking

We check the gate on the exterior chemical storage fence.

Must be: The gate must close and latch itself and have a permanent lock.

If it fails: Add self-closing hinges, a self-latching mechanism, and a permanent lock to the gate.

MAHC 4.9.2.3.3

All doors opening into CHEMICAL STORAGE SPACES shall be equipped with permanent signage:

What we inspect

Chemical storage doors require signage warning of hazards and SDS location

We check the signage on doors leading into the chemical storage room.

Must be: The door needs signs warning against unauthorized entry, listing the hazards present, showing where the safety data sheets are kept, and displaying an NFPA hazard chart.

If it fails: Post the required warning, hazard, and SDS-location signage on the chemical storage door.

MAHC 4.9.2.4.1A

1) Warning against unauthorized entry,
2) Specifying the expected hazards,
3) Specifying the location of the associated SDS forms, and
4) Product chemical hazard NFPA chart.
MAHC 4.9.2.4.5.2A

Automatic Lock

Such doors shall be equipped with a corrosion-resistant, automatic lock to prevent unauthorized entry.

What we inspect

Chemical storage door lock must open one-handed from inside

We check the lock on the chemical storage door.

Must be: The door must lock automatically from outside but open with one hand from inside, without a key or tool.

If it fails: Install a corrosion-resistant lock with a simple one-handed interior release, like a panic-style handle.

MAHC 4.9.2.4.5.2A

MAHC 4.9.2.4.5.7A

Limit Switch

Such doors shall be equipped with a limit switch and an alarm that will sound if the door remains open for more than 30 minutes.

What we inspect

Chemical storage door alarm required if door left open more than 30 minutes

We check for a door alarm on chemical storage rooms that open into the building.

Must be: An alarm must sound, loud enough to hear from 10 feet away, if the door is left open more than 30 minutes.

If it fails: Install a timed door-open alarm on the chemical storage door.

MAHC 4.9.2.4.5.7A

MAHC 4.9.2.6.2.1.1

Building Exterior

This corrosion-resistant duct shall exhaust to the exterior and must end at a point on the exterior of the building, at least 20 feet (6.1

What we inspect

Chemical storage exhaust duct must discharge 20 ft from air intake

We check where the chemical storage room's exhaust duct vents to outside air.

Must be: The duct must discharge outdoors at least 20 feet from any air intake for breathing, cooling, or combustion air.

If it fails: Reroute the exhaust duct's outdoor discharge point to at least 20 feet from the nearest air intake.

MAHC 4.9.2.6.2.1.1

m) from any air intake for breathing air, cooling air, or combustion air.
MAHC Table 4.7.1.10 (activity pools)

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

What we inspect

Activity pools require turnover time of 2 hours or less

We check how quickly the filtration system cycles the full volume of an activity pool.

Must be: An activity pool's entire water volume must filter through the system at least once every 2 hours.

If it fails: Increase pump flow or filter capacity to speed up the turnover time.

MAHC Table 4.7.1.10 (activity pools)

Type of Pools Turnover Maximum
Activity Pools 2 hours or less
Diving Pools 8 hours or less
Interactive Water Play* 0.5 hours or less
Lazy River 2 hours or less
Plunge Pools 1 hour or less
Runout Slide 1 hour or less
Wading Pools* 1 hour or less
Wave Pools 2 hours or less
All Other Pools 6 hours or less
Submit engineering justification
Surf Pools
from equipment manufacturer
*Shall have secondary treatment
MAHC Table 4.7.1.10 (all other pools)

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

What we inspect

Default pool turnover time of 6 hours or less

We check how quickly your pool's full volume of water cycles through the filter.

Must be: Water must turn over completely through the filtration system at least once every 6 hours.

MAHC Table 4.7.1.10 (all other pools)

Type of Pools Turnover Maximum
Activity Pools 2 hours or less
Diving Pools 8 hours or less
Interactive Water Play* 0.5 hours or less
Lazy River 2 hours or less
Plunge Pools 1 hour or less
Runout Slide 1 hour or less
Wading Pools* 1 hour or less
Wave Pools 2 hours or less
All Other Pools 6 hours or less
Submit engineering justification
Surf Pools
from equipment manufacturer
*Shall have secondary treatment
MAHC Table 4.7.1.10 (interactive water play)

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

What we inspect

Interactive water play turnover 0.5 hr max, secondary treatment

We check how quickly a splash pad's water recirculates and whether it has backup disinfection.

Must be: Interactive water play features must fully turn over their water at least every 30 minutes and include secondary treatment.

If it fails: Increase filtration flow and add a secondary treatment system such as UV or ozone.

MAHC Table 4.7.1.10 (interactive water play)

Type of Pools Turnover Maximum
Activity Pools 2 hours or less
Diving Pools 8 hours or less
Interactive Water Play* 0.5 hours or less
Lazy River 2 hours or less
Plunge Pools 1 hour or less
Runout Slide 1 hour or less
Wading Pools* 1 hour or less
Wave Pools 2 hours or less
All Other Pools 6 hours or less
Submit engineering justification
Surf Pools
from equipment manufacturer
*Shall have secondary treatment
MAHC Table 4.7.1.10 (lazy river)

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

What we inspect

Lazy rivers require turnover time of 2 hours or less

We check how quickly a lazy river's water is filtered.

Must be: A lazy river's entire water volume must turn over at least once every 2 hours.

MAHC Table 4.7.1.10 (lazy river)

Type of Pools Turnover Maximum
Activity Pools 2 hours or less
Diving Pools 8 hours or less
Interactive Water Play* 0.5 hours or less
Lazy River 2 hours or less
Plunge Pools 1 hour or less
Runout Slide 1 hour or less
Wading Pools* 1 hour or less
Wave Pools 2 hours or less
All Other Pools 6 hours or less
Submit engineering justification
Surf Pools
from equipment manufacturer
*Shall have secondary treatment
MAHC Table 4.7.1.10 (wading pools)

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

What we inspect

Wading pools require turnover time of 1 hour or less, with secondary treatment

We check how quickly a wading pool's water is filtered and whether it has backup disinfection.

Must be: A wading pool must fully turn over its water at least once per hour and include secondary treatment such as UV or ozone.

If it fails: Upgrade the filtration flow rate and add a secondary treatment system such as UV or ozone.

MAHC Table 4.7.1.10 (wading pools)

Type of Pools Turnover Maximum
Activity Pools 2 hours or less
Diving Pools 8 hours or less
Interactive Water Play* 0.5 hours or less
Lazy River 2 hours or less
Plunge Pools 1 hour or less
Runout Slide 1 hour or less
Wading Pools* 1 hour or less
Wave Pools 2 hours or less
All Other Pools 6 hours or less
Submit engineering justification
Surf Pools
from equipment manufacturer
*Shall have secondary treatment
MAHC Table 4.7.1.10 (wave pools)

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

Table 4.7.1.10: Aquatic Venue Maximum Allowable Turnover Times

What we inspect

Wave pools require turnover time of 2 hours or less

We check how quickly a wave pool's water is filtered.

Must be: A wave pool's entire water volume must turn over at least once every 2 hours.

MAHC Table 4.7.1.10 (wave pools)

Type of Pools Turnover Maximum
Activity Pools 2 hours or less
Diving Pools 8 hours or less
Interactive Water Play* 0.5 hours or less
Lazy River 2 hours or less
Plunge Pools 1 hour or less
Runout Slide 1 hour or less
Wading Pools* 1 hour or less
Wave Pools 2 hours or less
All Other Pools 6 hours or less
Submit engineering justification
Surf Pools
from equipment manufacturer
*Shall have secondary treatment
MAHC Table 4.8.1.3

Table 4.8.1.3 Minimum Slopes for Drainage

Table 4.8.1.3 Minimum Slopes for Drainage

What we inspect

Deck minimum slope for drainage varies by surface texture

We check that the pool deck slopes properly to drain water away from the pool.

Must be: The deck must slope away from the pool at least 1/8 inch per foot for smooth surfaces, up to 3/8 inch per foot for heavily textured ones like brick.

If it fails: Have a contractor regrade or resurface low or flat spots so water drains away from the pool.

MAHC Table 4.8.1.3

Surface Minimum Slope
1/8 inch per foot
Smooth finishes; such as tile, hand-finished
concrete & lightly- broomed concrete
(3.2 mm/30.5 cm)
1/4 inch per foot
Moderately textured finishes; such as exposed
aggregate or medium-broomed concrete
(6.4 mm/30.5 cm)
3/8 inch per foot
Heavily textured finishes; such as brick (where
permitted)
(9.5 mm/30.5 cm)
MAHC Table 4.8.2.3 (1m board)

Table 4.8.2.3: Minimum Dimensions of Components Related to Diving Wells by Diving Board Height

Table 4.8.2.3: Minimum Dimensions of Components Related to Diving Wells by Diving Board Height

What we inspect

1-meter diving board requires minimum 12.0 ft water depth at plummet

We measure the water depth directly under a 1-meter diving board.

Must be: The diving well under a 1-meter board must be at least 12 feet deep.

MAHC Table 4.8.2.3 (1m board)

*Letters refer to MAHC Figures 4.8.2.2.1 & 4.8.2.2.2
MinimumMinimumMinimumMinimum
Ref* Diving Board HeightDimensionDimensionDimensionDimension

For general reference only — not legal advice. Always confirm the current rule with the issuing authority.