Section Env-Wq 1108.13 - PBF Chemical and Physical Water Quality Standards(a) The owner of a PBF shall not allow bathers to use the PBF unless the water therein meets the following chemical and physical standards: (1) The pH shall be between 7.0 and 7.8;(2) Clarity shall be such that the main drains are clearly visible at all times;(3) Heated swimming, wading, and special recreation pool water temperature shall not exceed 89°F, equivalent to 32°C;(4) Heated therapy pool and spa water temperature shall not exceed 104°F, equivalent to 40°C;(5) Turbidity shall not exceed 1.0 nephelometric turbidity unit (NTU);(6) For swimming, wading, and special recreation pool water:a. The free available chlorine level shall be one to 5 milligrams per liter (mg/L); orb. The free available bromine level shall be 2 to 10 mg/L;(7) For therapy pool and spa water, the free available chlorine or free available bromine level shall be 2 to 10 mg/L;(8) The combined chlorine level shall not exceed 0.5 mg/L;(9) Where an ORP controller is used, the minimum set point value shall not be less than 650 mV;(10) The cyanuric acid level shall not exceed 50 mg/L; and(11) The total alkalinity shall be 60 to 180 mg/L.(b) No chemical shall be manually added to the water while the pool is open for operation.N.H. Admin. Code § Env-Wq 1108.13
Derived from Volume XLI Number 19, Filed May 13, 2021, Proposed by #13198, Effective 5/1/2021, Expires 5/1/2031 (see Revision Note #3 at chapter heading for Env-Wq 1100) (formerly Env-Wq 1105.13)