(A) Pool water shall be disinfected through the use of chlorine, hypochlorites or other equally effective disinfectant approved by the Enforcement Authority. The pool shall be disinfected via an automatic disinfection system bearing the National Sanitation Foundation Seal of Approval for the disinfectant being dispensed.
(1) If chlorination is used, the chlorine residual shall not be less than 0.4 ppm and not greater than 1.5 ppm of free available chlorine at all times the pool is in operation.
(2) If chlorinated cyanurate disinfection is used, the residual shall not be less than 1.0 ppm and not greater than 4 ppm of free available chlorine at all times the pool is in operation unless a greater residual is approved by the Enforcement Authority.
(3) If bromine is used, the free bromine residual shall not be less than 2.0 ppm at all times the pool is in operation and not greater than 6.0 ppm unless a greater residual is approved by the Enforcement Authority.
(4) Class C and Class D pools using chlorine shall be disinfected to maintain a minimum disinfectant residual 50% greater than specified above.
(5) Other methods of disinfection shall provide a measurable halogen residual and will be permitted only after approval by the Enforcement Authority. Oxidization of pool water shall be required on all alternative methods of disinfection.
(6) A pool not meeting this disinfectant requirement shall be closed immediately and remain closed to all uses until the disinfection deficiency is corrected.
(B) The disinfection residual in a swimming pool shall be checked immediately prior to being opened to swimming. Frequent checks shall be made on the amount of disinfectant residual during periods of heavy bather load and during periods of high intensity of sunlight.
(C) A disinfectant comparator testing kit approved by the Enforcement Authority, capable of measuring at least the disinfectant residual ranges required in this section shall be used by the permit holder.
(D) The pH of the water in the pool shall be maintained between 7.2 and 8.0. A pH testing kit, to read from 6.8 to 8.2 with at least two intermediate readings, shall be used by the permit holder. When the pH drops below 7.0 or rises above 8.2 in the pool water, the pool shall be closed to all uses.
(E) If chlorinated cyanurate disinfection is used, the maximum permissible concentration of cyanuric acid shall not be normally greater than 100 ppm, and a test kit for cyanuric acid shall be used by the permit holder.
(F) Hand dosing of disinfectant is not allowed except for the purpose of super-disinfection and/or for bringing the residual up to required levels when the pool is closed. Super-chlorination to achieve breakpoint chlorination shall be done when the difference between free and total chlorine is greater than .4 ppm. No use of the pool will be allowed until the chlorine residual has dropped to 4.0 ppm or below throughout the pool.
(G) If gas chlorination is used, suitable equipment for feeding chemicals to maintain the required pH shall be used.
(H) Total dissolved solids shall not exceed the lesser of either 3,000 ppm or 2,000 ppm over the amount found to naturally occur in the supply water.
('74 Code, § 11-5-7B.4) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)