§ 7.72.120. Disinfecting materials, methods and water quality standards.

Regulated swimming pools, spa pools, wading pools or other recreational water features when in use shall be continuously disinfected by a chemical which imparts an easily measured, free available residual effect. When chlorine is used, a free chlorine residual of at least 1.0 ppm shall be maintained in swimming pools while in operation. A free chlorine residual of at least 2.0 ppm shall be maintained in spa pools and wading pools. A free chlorine residual of at least 2.0 ppm at point of contact shall be maintained in other recreational water features when in operation. Free chlorine residuals shall not exceed 5.0 ppm in swimming pools, spa pools, wading pools or recreational water features when in use. If other disinfectants are used, residuals of equivalent disinfecting strength shall be maintained. A testing kit, approved by the health officer, for measuring the concentration of the disinfectant shall be provided at each regulated swimming pool, regulated spa pool, wading pool or other recreational water feature. The health officer may accept other disinfecting materials or methods when those materials have been adequately demonstrated to provide a satisfactory residual effect which is easily measured and determined to be equally as effective under conditions of use as the chlorine concentration required herein, while not being dangerous to public health, create objectionable physiological effects or impart toxic properties to the water. The disinfected water shall be maintained in an alkaline condition as indicated by a pH of not less than 7.0 and not over 8.0. A pH testing kit accurate to the nearest 0.2 pH unit shall be provided at each regulated swimming pool, regulated spa pool, wading pool or other recreational water feature. The total alkalinity of the water shall be at least 80 ppm. and at most 180 ppm., as measured by the methyl-orange test. Chemicals used in controlling the quality of water shall be demonstrated as imparting no toxic properties to the water. Such chemicals as may be used for algae control shall be approved for use by the health officer. The water in a swimming pool, wading pool or spa pool shall have sufficient clarity at all times so that the main drain is clearly visible and sharply defined when observed from the edge of the pool at a point adjacent thereto. For spa pools, the maximum allowable water temperature shall not exceed one hundred four degrees Fahrenheit.

(Ord. No. 46-592 § 1 (part))