8.32.080   Water quality standards.
   A.   Generally. Swimming pool water shall be treated and maintained so that, whenever the swimming pool is open for use, the bacterial, chemical and physical qualities of the water will meet the standards set forth in this section.
   B.   Bacterial Standards. Not more than fifteen percent of the water samples collected for a pool shall:
      1.   Contain more than two hundred bacteria per milliliter, as determined by the standard (358 C) Agar Plate Count; or
      2.   Show a confirmed positive test for coliform organisms in any of 5-10 milliliter portions of a sample, or more than one coliform organism per fifty milliliters when the membrane filter test is used. All samples shall be collected dechlorinated, or similarly neutralized when another disinfectant is used, and examined in accordance with the procedures outlined in the latest edition of Standard Method for the Examination of Water and Wastewater (APHA). The department may collect, or require the pool owner to collect and submit, water samples for bacteriological examination on a routine basis while the pool is in active use.
   C.   Chemical Standards. All pools shall be continuously disinfected by an approved means which will maintain an adequate, readily measurable residual or disinfectant in the water. Whenever chlorine, or chlorine compound, is employed for pool disinfection, the amount of free chlorine residual in the water shall not be less than 1.0 P.P.M. or more than 5.0 P.P.M. at a pH of 7.0 to 8.0. Whenever chlorinated isocyanurate or isocyanuric acid are applied to the water for stabilization, the free chlorine residual shall not be less than 1.0 P.P.M. or more than 5.0 P.P.M. with a isocyanurate level of not more than 100 P.P.M. The total alkalinity must be between 60 and 180 P.P.M. The procedure for determination of free chlorine residual shall be by the DPD method or any of the other procedures outlined in the latest edition of Standard Methods for Examination of Water or Wastewater (APHA), or by other methods approved by the department.
   D.   Physical Standards. The surface of the pool water shall be kept free of scum and floating debris. The bottom and sides shall be maintained free of sediment, dirt, slime and algae. Water shall be maintained free of turbidity and shall be sufficiently clear so that the main drain outlet is clearly visible from the side of the pool, or that a Secchi disk 200 mm. in diameter when placed at the bottom of the pool at the deepest point is clearly visible from all sides of the pool.
   E.   Tests. All pools shall be equipped with approved test equipment to determine pH and disinfectant residual. The pool operator shall perform the tests and record the results in the daily operating records. Such records shall be made available to state and county health department officials upon request. Public pools shall be tested every hour. Semi-public pools shall be tested twice a day.
(Ord. 1990-81 § 3, 1990: Ord. 1984-42 (part), 1984: prior code § 23.60.010(H))