RECOMMENDED BACTERIAL LIMITS. Seventy five percent of samples covering any period of time from any pool shall not have a total colony count exceeding 50 colonies per 100ml and the remainder should not exceed 200 colonies per ml. The arithmetic mean coliform density of all standard samples examined per month shall not exceed 4 per 100ml in two consecutive samples. If the coliform counts in a single sample exceed the above limit, confirmation samples are required and shall be examined daily until results from at least two consecutive samples show the water to be of satisfactory quality.
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RECOMMENDED BACTERIAL LIMITS. Seventy five percent of samples covering any period of time from any pool shall not have a total colony count exceeding 50 colonies per 100ml 100ml. and the remainder should not exceed 200 colonies per ml. The arithmetic mean coliform density of all standard samples examined per month shall not exceed 4 per 100ml in two consecutive samples. If the coliform counts in a single sample exceed the above limit, confirmation samples are required and shall be examined daily until results from at least two consecutive samples show the water to be of satisfactory quality.
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