Code of Massachusetts Regulations
105 CMR - DEPARTMENT OF PUBLIC HEALTH
Title 105 CMR 435.000 - Minimum Standards For Swimming Pools (state Sanitary Code: Chapter V)
Operation and Maintenance
Section 435.30 - Water Testing Equipment

(1) The operator shall provide and use a DPD test kit for measuring the concentration of chlorine or bromine and an appropriate test kit for measuring pH, alkalinity, and cyanuric acid levels at each swimming, wading and special purpose pool. The test kit shall be maintained in good repair together with an adequate supply of reagents that are no more than one year old. The requirements of 105 CMR 435.29 will not be superseded by the use of automatic equipment.

(2) An accurate unbreakable thermometer (± 1°F) shall be provided at each special purpose pool to determine water temperature.