(a) Swimming pools when in use shall be continuously disinfected by an automatic chemical feeding device using a disinfectant which imparts an easily measured residual effect. When chlorine is used, a free chlorine residual of at least 0.4 ppm shall be maintained throughout the pool whenever it is open or in use. If other chemicals are used, residuals of equivalent disinfecting strength shall be maintained. A testing kit which is approved by the Director for measuring the concentration of the disinfectant shall be provided at each swimming pool.
(b) Swimming pool water shall be maintained in an alkaline condition as indicated by a pH of not less than 7.2 and not over 8.0. A pH testing kit which is approved by the Director shall be provided at each swimming pool.
(c) Swimming pool water shall have sufficient clarity when in use, so that a black disc, six (6) inches in diameter, is readily visible when placed on a light field at the deepest point of the swimming pool. There shall be no indication of algae growth or sediment in the pool when in use.
(d) Bacteriological samples are not required to be routinely taken at a swimming pool. However, when the Board of Health determines that bacteriological samples are required for enforcement purposes, the following standards are applicable: not more than fifteen percent (15%) of the samples of not less than four (4) samples in a month shall:
(1) Contain more than two hundred (200) bacteria per milliliter as determined by the standard (35 degrees c) agar plate count; or
(2) Show positive test (confirmed test) for coliform organisms in any of the five (5) 10-milliliter portions of a sample or more than 3.0 coliform organisms per one hundred (100) ml. when the membrane filter test is used.
(e) The foregoing requirements shall not apply to single-family or two or three family dwellings.
(Ord. 47-87. Passed 6-22-87.)