1. (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. (1) The pH shall be between 7.0 and 7.8;
   2. (2) Clarity shall be such that the main drains are clearly visible at all times;
   3. (3) Heated swimming, wading, and special recreation pool water temperature shall not exceed 89°F, equivalent to 32°C;
   4. (4) Heated therapy pool and spa water temperature shall not exceed 104°F, equivalent to 40°C;
   5. (5) Turbidity shall not exceed 1.0 nephelometric turbidity unit (NTU);

   6. (6) For swimming, wading, and special recreation pool water:

      1. a. The free available chlorine level shall be one to 5 milligrams per liter (mg/L); or
      2. b. The free available bromine level shall be 2 to 10 mg/L;
   7. (7) For therapy pool and spa water, the free available chlorine or free available bromine level shall be 2 to 10 mg/L;
   8. (8) The combined chlorine level shall not exceed 0.5 mg/L;
   9. (9) Where an ORP controller is used, the minimum set point value shall not be less than 650 mV;
   10. (10) The cyanuric acid level shall not exceed 50 mg/L; and
   11. (11) The total alkalinity shall be 60 to 180 mg/L.
2. (b) No chemical shall be manually added to the water while the pool is open for operation.

Source. (See Revision Note #1 at chapter heading for Env-Wq 1100) #8468, eff 11-1-05; ss by #10577, eff 5-1-14 (See Revision Note #2 at chapter heading for Env-Wq 1100); ss by #13198, eff 5-1-21 (see Revision Note #3 at chapter heading for Env-Wq 1100) (formerly Env-Wq 1105.13)