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ATCP 76.11(6)(c)4. 4. Diatomaceous earth wastewater separation tanks, where installed, shall be cleaned according to manufacturer instructions.
ATCP 76.11(6)(c)5. 5. Positive displacement feeder suction intake shall be suspended at least 6 inches above any sludge layer in the solution tank. Tanks for mixing and distribution of chemicals shall be appropriately labeled. A cover with a screened vent shall be provided on all mixing and distribution tanks. The installation shall be maintained to prevent backflow of water into the tanks and to prevent the chemicals from being siphoned out of the tanks into the pool recirculation system.
ATCP 76.11(6)(c)6. 6. Diatomaceous earth slurry feeders. The lowest effective concentration of solution shall be used in a diatomaceous earth slurry feeder. The concentration of solution may not exceed 5% by weight. The diatomite slurry feeder head and lines shall be flushed once every 15 minutes for at least one minute to assure proper and continuous operation. Water from the discharge side of the recirculation pump may be used. If connection is to a potable water supply line, the supply line shall be equipped with an approved backflow or backsiphonage prevention device. Diatomite slurry tank agitators shall run continuously.
ATCP 76.11(6)(d) (d) Cartridge filters.
ATCP 76.11(6)(d)1.1. Cartridge–type filters shall be removed and cleaned when the pressure differential is greater than 11 pounds per square inch or as recommended by the manufacturer.
ATCP 76.11(6)(d)2. 2. Cartridges shall be replaced when plugged or damaged. A duplicate set of replacement cartridges shall be available on-site and used when removing a dirty cartridge from the filter for cleaning.
ATCP 76.11 History History: CR 06-086: cr. Register August 2007 No. 620, eff. 2-1-08; CR 09-115: am. (1), r. and recr. Table B Register May 2010 No. 653, eff. 6-1-10; renum. from DHS 172.11 Register June 2016 No. 726; correction in (4) (b), (e), Table A, B made under s. 13.92 (4) (b) 7., Stats., Register June 2016 No. 726.
ATCP 76.12 ATCP 76.12Labeling, storing, mixing, and handling chemicals.
ATCP 76.12(1)(1)Labeling. Except for erosion feeders, which require only the name of the chemical, all chemicals used in the operation and maintenance of pools, and bulk storage tanks containing the chemicals, shall be conspicuously labeled with the following information:
ATCP 76.12(1)(a) (a) Name of the product.
ATCP 76.12(1)(b) (b) The manufacturer's name and address.
ATCP 76.12(1)(c) (c) Active ingredients.
ATCP 76.12(1)(d) (d) Directions for use.
ATCP 76.12(1)(e) (e) Hazardous ingredient warning.
ATCP 76.12(1)(f) (f) The U.S. environmental protection agency registration number.
ATCP 76.12(2) (2)Storage. Chemicals shall be stored in the original or a properly-labeled container, which shall be covered and kept in a clean, dry, well ventilated and locked area away from flammables, incompatible chemicals, and heat sources. Only authorized personnel shall have access to the storage area. Chemicals may not be stored in chlorine gas storage areas. Food may not be stored in the chemical storage area. Smoking is prohibited in the chemicals storage area.
ATCP 76.12(3) (3)Mixing. A chemical solution shall be added to water, not by adding water to the chemical. Each chemical or chemical solution shall be separately added to the water.
ATCP 76.12(4) (4)Handling.
ATCP 76.12(4)(a) (a) Smoking. Smoking by anyone handling chemicals or by anyone within the immediate vicinity of chemicals being mixed is prohibited.
ATCP 76.12(4)(b) (b) Material safety data sheet. Material safety data sheets shall be readily available at the pool attraction area for every chemical used.
ATCP 76.12 History History: CR 06-086: cr. Register August 2007 No. 620, eff. 2-1-08; renum. from DHS 172.12 Register June 2016 No. 726.
ATCP 76.13 ATCP 76.13Disinfectant feeders and filter aid equipment.
ATCP 76.13(1)(1)General. All disinfectant feeders shall be installed according to the manufacturer's directions and used only with the disinfectant recommended by the manufacturer and meet all of the following requirements:
ATCP 76.13(1)(a) (a) Feeders shall be automatic, easily adjustable, capable of providing the required chemical residuals, equipped with flow control valves upstream and downstream from the feeder, easily disassembled for cleaning and maintenance, durable, and capable of accurate feeding.
ATCP 76.13(1)(b) (b) Feeders shall be properly vented and incorporate antisiphon safeguards to prevent disinfectant feeding in the event of the failure of recirculation equipment.
ATCP 76.13(1)(c) (c) Feeder pumps shall be electrically connected to the recirculation pump control circuit and have a separate disconnect switch.
ATCP 76.13(2) (2)Equipment maintenance. All maintenance that presents a danger to the patrons, including changing the gas tanks, shall be performed when the pool is not in use or is closed to public use.
ATCP 76.13(3) (3)Repairs. Only personnel trained and licensed in handling gas chlorine by a certifying agency such as the Federal occupational health and safety administration may repair gas chlorinators.
ATCP 76.13 History History: CR 06-086: cr. Register August 2007 No. 620, eff. 2-1-08; CR 09-115: am. (1) (intro.) and (a) Register May 2010 No. 653, eff. 6-1-10; renum. from DHS 172.13 Register June 2016 No. 726.
ATCP 76.14 ATCP 76.14Disinfectant feeding and residuals.
ATCP 76.14(1)(1)General. Each pool in use shall be automatically and continuously disinfected by means of disinfectant and feeding equipment that is in compliance with this section and s. ATCP 76.13.
ATCP 76.14(2) (2)Chemical use requirements.
ATCP 76.14(2)(a) (a) Disinfectant-producing chlorine and bromine and other chemicals. Disinfectant-producing chlorine or bromine and any supplemental chemical used shall meet all of the following requirements:
ATCP 76.14(2)(a)1. 1. The disinfectant or supplemental chemical is registered with the U.S. environmental protection agency as a disinfectant, and the product label is registered with the Wisconsin department of agriculture, trade and consumer protection.
ATCP 76.14(2)(a)2. 2. The disinfectant has an effective residual that can be measured easily and accurately by an approved field test procedure.
ATCP 76.14(2)(a)3. 3. The disinfectant is compatible for use with other chemicals normally used in the water treatment or is clearly identified as having a use limitation.
ATCP 76.14(2)(a)4. 4. The disinfectant does not impart toxic properties to the water when used according to the manufacturer's directions.
ATCP 76.14(2)(a)5. 5. The disinfectant does not create an undue safety hazard when handled, stored, or used according to the manufacturer's directions.
ATCP 76.14(2)(b) (b) Bromine. Bromine may not be used in a waterslide, pool slide, plunge pool or wave pool without the department's approval.
ATCP 76.14(2)(c) (c) Gas chlorination.
ATCP 76.14(2)(c)1.1. Where chlorine gas is used, all staff who operate equipment shall be trained in the handling and use of chlorine gas, including the use of the self–contained breathing apparatus.
ATCP 76.14(2)(c)2. 2. A plastic bottle of ammonium hydroxide or another leak detection method approved by the department shall be available at the chlorine gas storage area. If an electronic leak detection system is installed, it shall be located in gas storage rooms and shall be maintained and tested annually. The results of the testing shall be maintained on the site.
ATCP 76.14(2)(c)3. 3. A list of telephone numbers to contact appropriate emergency personnel in the event of an emergency related to chlorine use shall be conspicuously posted at a continuously accessible telephone located reasonably close to the chlorine gas storage room. A durable placard clearly stating the location of the nearest accessible phone shall be posted on the outside of the chlorine gas storage room door.
ATCP 76.14(2)(c)4. 4. A self–contained breathing apparatus designed for use in a chlorine gas atmosphere shall be stored where it is immediately accessible to personnel who enter the chlorine gas storage room. The apparatus shall be continuously usable and readily accessible, and replacement parts shall be readily accessible. The pool shall implement a written respiratory protection plan in compliance with 29 CFR 1910.134, that includes procedures for the selection and use of respirators and training users.
ATCP 76.14 Note Note: Section 29 CFR 1910.134 may be reviewed at, in the offices of the department's division of food and recreational safety, the legislative reference bureau, or as part of the U.S. Code of Federal Regulations at any public library, university or college library.
ATCP 76.14(2)(c)5. 5. A written plan of action for responding to a chlorine gas emergency shall be posted and practiced by maintenance staff.
ATCP 76.14(2)(c)6. 6. The doors to all rooms in which a chlorine gas feeder is located or a cylinder of compressed chlorine gas is located or stored shall be labeled “DANGER–CHLORINE GAS" in clearly readable letters.
ATCP 76.14(2)(c)7. 7. Light switches and exhaust switches shall be located outside of the chlorine gas storage room.
ATCP 76.14(2)(c)8. 8. Chlorine cylinders shall be stored indoors in an area having approximately the same air temperature as the room housing the chlorinator and shall be sheltered from a direct source of heat or sunlight. Cylinders shall be in an upright position and shall be chained or strapped to a rigid support. Cylinders may not be moved unless the protection cap is secured over the valve. Empty cylinders shall be tagged to indicate they are empty. Cylinder valves shall be closed.
ATCP 76.14(3) (3)Feeding. Disinfectant and filter aid feeding shall be conducted as follows, as applicable respectively:
ATCP 76.14(3)(a) (a) Positive displacement disinfectant feeding. Liquid chemicals shall be fed into water circulation piping or a surge tank or vacuum filter by means of a positive displacement feeder either at full strength or diluted. If calcium hypochlorite or another chemical that forms a residue is used, a 2– tank system shall be used. One tank shall be used for mixing the solution and settling the precipitate. The clear liquid shall be decanted or siphoned into the second tank for distribution.
ATCP 76.14(3)(b) (b) Flow–through feeders. The chemical used, the manner of usage, and the quantity used in a flow–through feeder shall be as recommended by the feeder manufacturer.
ATCP 76.14(3)(c) (c) Dry feeders. Feeders used for feeding dry chemicals into water circulation piping, a surge tank, or vacuum filter shall be maintained for proper operation.
ATCP 76.14(4) (4)Chemical concentrations and residuals.
ATCP 76.14(4)(a)(a) Minimum disinfectant residuals. Except as provided in par. (b), feeding shall result in the minimum disinfectant residuals in Table ATCP 76.14.
ATCP 76.14(4)(b) (b) Cyanurates. The water cyanuric acid concentration may not exceed 30 ppm.
ATCP 76.14(4)(c) (c) pH control. The water's pH shall be maintained within a range of 7.2 to 7.8.
ATCP 76.14(4)(d) (d) Alkalinity. The total alkalinity of pool water shall be maintained between 60 and 180 ppm as calcium carbonate unless it can be shown that another level of total alkalinity produces chemically balanced water based on calculations approved by the department.
ATCP 76.14(4)(e) (e) Combined chlorine. When combined chlorine exceeds 0.5 ppm in an outdoor pool or 0.8 ppm in an indoor pool, the water shall be treated to breakpoint chlorination using a chlorine product or a nonchlorinated oxidizer such as potassium peroxymonosulfate. Isocyanurates may not be used to reach breakpoint chlorination. The pool shall be closed to the public during periods of breakpoint chlorination when a chlorine product is used.
ATCP 76.14(4)(f) (f) Maximum chlorine residual. The maximum chlorine residual in any pool shall not exceed 10 ppm.
ATCP 76.14(4)(g) (g) Maximum total bromine. The maximum total bromine in a pool shall not exceed 20 ppm. - See PDF for table PDF
ATCP 76.14(5) (5)Electronic monitoring devices.
ATCP 76.14(5)(a) (a) When oxidation potential controllers are used the water potential shall be kept between 650-850 mV. When the water potential reads below 650 mV or above 850 mV the operator shall manually test the pool water with an approved test kit.
ATCP 76.14(5)(b) (b) When a waterslide plunge pool or a wave pool is equipped with approved and properly functioning electronic monitoring devices to control the chlorine residual and pH level, the free available chlorine residual may be a minimum of 1.0 ppm.
ATCP 76.14 History History: CR 06-086: cr. Register August 2007 No. 620, eff. 2-1-08; CR 09-115: am. Table Register May 2010 No. 653, eff. 6-1-10; renum. from DHS 172.14 Register June 2016 No. 726; correction in (4) (a), Table made under s. 13.92 (4) (b) 7., Stats., Register June 2016 No. 726.
ATCP 76.15 ATCP 76.15Alternative disinfection systems. Any one of the following supplemental systems may be added to a pool if an automated disinfection system is in place and on line to maintain the disinfectant residuals under Table ATCP 76.14:
ATCP 76.15(1) (1)Chlorine generators. Chlorine generators shall be NSF approved and installed according to NSF and manufacturer instructions. An additional disinfection system shall remain on line to provide the capacity to superchlorinate the water and maintain the required sanitizer residual.
ATCP 76.15(2) (2)Ozone generators.
ATCP 76.15(2)(a) (a) Ozone generators shall provide a concentration of ozone in the return line to the pool not to exceed 0.1 mg/L.
ATCP 76.15(2)(b) (b) The generator shall be electrically interlocked with the recirculation pump to prevent the feeding of ozone when the recirculation pump is not operating. A flow sensor controller may also be used to turn off the feeder when flow is interrupted.
ATCP 76.15(2)(c) (c) Off-gassing of ozone shall not result in ozone levels in the equipment room or pool area exceeding 0.1 ppm.
ATCP 76.15(3) (3)Ultra violet light. Ultraviolet light units shall be NSF tested and approved for use in water disinfection systems and installed pursuant to NSF requirements.
ATCP 76.15 History History: CR 06-086: cr. Register August 2007 No. 620, eff. 2-1-08; CR 09-115: am. (1) Register May 2010 No. 653, eff. 6-1-10; renum. from DHS 172.15 Register June 2016 No. 726; correction in (intro.) made under s. 13.92 (4) (b) 7., Stats., Register June 2016 No. 726.
ATCP 76.16 ATCP 76.16Water quality.
ATCP 76.16(1)(1)General requirement. Pool water shall be free of chemical, physical and microbial substances known to be, or suspected of being, capable of creating toxic reactions or skin or membrane irritations.
ATCP 76.16(2) (2)Water clarity. Water containing 0.5 or less Nephelometric Turbidity Units is considered clear. The main drain shall be readily visible from the pool deck.
ATCP 76.16 Note Note: Water containing 0.5 or less Nephelometric Turbidity Units is considered clear.
ATCP 76.16(3) (3)Water sampling.
ATCP 76.16(3)(a) (a) Sample collection and analysis. The department or its agent may collect samples of pool water for microbiological analysis in evaluating water quality. The analysis of water samples shall be performed by a laboratory accredited by the Wisconsin department of agriculture, trade, and consumer protection, and comply with the procedures established in the 21st edition of Standard Methods for the Examination of Water and Wastewater, published jointly by the American Public Health Association, the American Water Works Association and the Water Environment Federation. These monitoring activities may be supplemented with additional microbiological analysis, which shall be performed by an accredited laboratory certified in those methods.
ATCP 76.16 Note Note: Primary protection from the risk of microbiological disease acquired from pools is achieved through monitoring and maintaining pH levels and disinfection residuals in the recommended ranges. A list of accredited laboratories may be obtained by calling the Wisconsin department of agriculture, trade, and consumer protection at 608-224-4712 or by email at The 21st edition of Standard Methods for the Examination of Water and Wastewater may be consulted at the offices of the legislative reference bureau at 1 East Main St., Madison, WI 53701, and may be purchased from the American Public Health Association, 800 I Street, N.W., Washington, D.C. 20001-3710.
ATCP 76.16(3)(b) (b) Bacteriological standards. Water quality should be maintained to meet the following standards:
ATCP 76.16(3)(b)1. 1. When bacteriological analysis of total coliforms is performed, no coliforms are present in a 100 mL sample.
ATCP 76.16(3)(b)2. 2. When bacteriological analysis is performed for the heterotrophic plate count, the total count may not exceed 200 colonies in a 1 mL sample.
ATCP 76.16(3)(b)3. 3. When bacteriological analysis is performed for staphylococci, the count may not exceed 50 organisms in a 100 mL sample.
ATCP 76.16(4) (4)Algae control. An algaecide may be used in a pool if the algaecide complies with s. ATCP 76.14 (2) and is used according to the manufacturer's directions for potable water.
ATCP 76.16 History History: CR 06-086: cr. Register August 2007 No. 620, eff. 2-1-08; renum. from DHS 172.16 Register June 2016 No. 726.
ATCP 76.17 ATCP 76.17Water test kits.
ATCP 76.17(1)(1)A test kit of a type approved by the department shall be maintained for testing the pool water pH; the disinfectant residual; the combined chlorine level, when chlorine is used; the total alkalinity; and the cyanuric acid concentration, when used.
ATCP 76.17(2) (2)Test kit reagents shall be stored in the original labeled container and shall be replaced as recommended by the manufacturer.
Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.