Wisconsin Administrative Code
Department of Agriculture, Trade and Consumer Protection
ATCP 55-89 - Food, Lodging, and Recreation Safety
Chapter ATCP 76 - Safety, Maintenance, and Operation of Public Pools and Water Attractions
Subchapter III - Water Treatment Systems and Water Quality
Section ATCP 76.17 - Water test kits

Universal Citation: WI Admin Code § ATCP 76.17

Current through August 26, 2024

(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

s. ATCP 76.17 Table A Required Test Kit Accuracy and Increment -

Minimum Accuracy Pf	Maximum Increment Pf
Chlorine and combined chlorine	+/- 0.2 ppm	0.2 ppm
pH	+/- 0.2 pH unit*	0.2 units
Alkalinity	+/- 25 percent	10 ppm
Cyanuric	+/- 20 percent	20 ppm
Bromine	+/- 10 percent	0.5 ppm

Note: *Operators who do not want to use a pH meter and are using a test kit with a pH accuracy of +/- 0.2 pH units must be able to maintain the pH within a range of 7.4 to 7.6. Due to a common degree of error in many available test kits for pH, it is strongly encouraged to use a pH meter, with an accuracy greater than 0.1 or better, to determine the PH reading on the higher and lower end. If the Taylor test kit is used and natural light is not available, the Taylor light box should be used as instructed in the manufacturer's directions.

(2) TEST REAGENTS USE AND STORAGE. Test kit reagents shall meet all of the following:

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

(b) Replaced. Replaced as recommended by the manufacturer. Pf

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

(3) TESTING REAGENT TECHNOLOGIES. The disinfectant or sanitizer testing reagent shall use one of the following technologies:

(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

(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

This section is created eff. 9-24-23 by CR 22-021.

Disclaimer: These regulations may not be the most recent version. Wisconsin may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.