N.H. Code Admin. R. Env-Wq 1108.13

Current through Register No. 25, June 20, 2024

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); or

b. 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. Code Admin. R. 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)