ATCP 76.16(3)(b)(b) Bacteriological standards. Water quality shall be maintained to meet the following standards:

ATCP 76.16(3)(b)1.1. When bacteriological analysis of total coliforms, Staphylococcus aureus, Pseudomonas aeruginosa or Legionella pneumophila is performed, no detectable levels are present in a 100 milliliter sample. P Any approved method for each analyte may be reported as either colony forming units or most probable number.

ATCP 76.16(3)(b)2.2. When bacteriological analysis is performed for the heterotrophic plate count, the total count may not exceed 200 colony forming units per milliliter (CFU/mL) in a 100 milliliter sample.Pf

ATCP 76.16(3)(b)3.3. If a pool is closed due to a water sample that contains total coliforms pursuant to s. ATCP 76.30 (1) (b), the pool can be reopened when the pool system is properly working, the disinfectant or sanitizer concentration is maintained pursuant to s. ATCP 76.14 Table A, and any fecal accidents have been treated pursuant to s. ATCP 76.31. P

ATCP 76.16(4)(4) Algae control. An algaecide may be used in a pool pursuant to ss. ATCP 29.50 (4) (b) 1. and 76.14 (2), according to the manufacturer’s label directions. P

ATCP 76.16 HistoryHistory: CR 22-021: cr. Register June 2023 No. 810, eff. 9-24-23; correction in (4) made under s. 35.17, Stats., Register June 2023 No. 810.

ATCP 76.17(1)(1) Approved. A test kit of a type approved by the department shall be maintained for testing the pool water pH; the disinfectant or sanitizer residual; the combined chlorine level, when chlorine is used; the total alkalinity; and the cyanuric acid concentration. The test kits shall meet the following specifications, as described in s. ATCP 76.17 Table A. Pf

ATCP 76.17(2)(2) Test reagents use and storage. Test kit reagents shall meet all of the following:

ATCP 76.17(2)(a)(a) Stored. Stored in the original container or per manufacturer directions. Pf

ATCP 76.17(2)(b)(b) Replaced. Replaced as recommended by the manufacturer. Pf

ATCP 76.17(2)(c)(c) Temperature range. Stored within the temperature range specified by the manufacturer for storage. Pf

ATCP 76.17(2)(d)(d) Use. Used and properly disposed of before the expiration date. Pf

ATCP 76.17(3)(3) Testing reagent technologies. The disinfectant or sanitizer testing reagent shall use one of the following technologies:

ATCP 76.17(3)(a)(a) Method. Diethyl–p–phenylene diamine or DPD in powder or liquid form. A test kit using the titrimetric method, ferrous ammonium sulfate and diethyl–p–phenylene diamine or FAS-DPD for chlorine and bromine testing and colorimetric comparators used for additional water testing shall be approved by the department and shall provide for accurate comparison in the required range for each test pursuant to s. ATCP 76.14 Table A.Pf

ATCP 76.17(3)(b)(b) Alternatives. Other photometric, electronic, or other technology that achieves the accuracy as described in s. ATCP 76.17 Table A, and measures analytes within the range pursuant to s. ATCP 76.14 Table A. Pf

ATCP 76.18(1)(a)(a) pH and disinfectant or sanitizer. Except as provided under sub. (3), water shall be tested for pH and disinfectant or sanitizer residual at the following times:

ATCP 76.18(1)(a)1.1. Daily before the pool is open to the public or before the pool is in use. Pf

ATCP 76.18(1)(b)(b) Combined chlorine. If chlorine is used, the water shall also be tested at least twice a week for the combined chlorine level. Pf

ATCP 76.18(1)(c)(c) Alkalinity. Water shall also be tested at least once a week for total alkalinity. Pf

ATCP 76.18(1)(d)(d) Cyanuric acid. If cyanuric acid is used in the water basin, the cyanuric acid concentration in the water shall be tested at least once a week. Pf

ATCP 76.18(2)(a)(a) pH and disinfectant or sanitizer. Except as provided under sub. (3), water shall be tested for pH and disinfectant or sanitizer residual at the following times:

ATCP 76.18(2)(a)1.1. Before the pool is open to the public or before the pool is in use and at least 4 times daily. Pf