D.C. Mun. Regs. tit. 25, r. 25-C406

Current through Register Vol. 71, No. 49, December 6, 2024

Rule 25-C406 - WATER QUALITY - CONTAMINATION

406.1

A 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.

D.C. Mun. Regs. tit. 25, r. 25-C406

Final Rulemaking published at 64 DCR 5359 (6/9/2017)