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D.C. Municipal Regulations (Last Updated: September 13, 2017) |
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Title 25. FOOD OPERATIONS AND COMMUNITY HYGIENE FACILITIES |
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SubTilte 25-C. SWIMMING POOL AND SPA REGULATIONS |
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Chapter 25-C4. WATER QUALITY, CIRCULATION SYSTEMS, AND REPORTING REQUIREMENTS |
Section 25-C406. WATER QUALITY – CONTAMINATION
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406.1A swimming pool, spa pool, or sauna shall be deemed contaminated when one (1) of the following conditions exists:
(a)More than one (1) ten milliliter (10 ml) portion of a sample shows a positive test for coliform organisms when multi-tube fermentation technique is used; or more than one (1) coliform per fifty milliliters (50 ml) when the membrane filter test is used; or
(b)Two (2) consecutive samples show a positive test for coliform organisms in any ten milliliter (10 ml) portion of a sample when the multi-tube fermentation technique is used or more than one (1) coliform per fifty milliliters (50 ml) when the membrane filter test is used; or
(c)Two (2) of any ten (10) consecutive samples show a positive test for coliform organisms in any of the ten milliliter (10 ml) portions of a sample when the multi-tube fermentation technique is used or more than one (1) coliform per fifty milliliters (50 ml) when the membrane filter test is used; or
(d)When performing diarrheal/Cryptosporidium decontamination in aquatic venues, the maximum allowable cyanuric acid concentration shall be 15 ppm.