Section Env-Ws 380.06 - Criteria for Avoiding Filtration Involving Source Water Quality Conditions(a) The fecal coliform concentration shall be equal to or less than 20/100 ml, or the total coliform concentration shall be equal to or less than 100/100 ml in representative samples of the source water immediately prior to the first or only point of disinfectant application in at least 90 percent of the measurements made for the 6 previous months that the system served water to the public on an ongoing basis. If a system measures both fecal and total coliforms, the fecal coliform criterion, but not the total coliform criterion, in this paragraph shall be met.(b) The turbidity level shall not exceed 5 NTU in representative samples of the source water immediately prior to the first or only point of disinfectant application unless: (1) Any such high turbidity event was caused by circumstances that were unusual and unpredictable; and(2) As a result of any such high turbidity event, there have not been more than 2 high turbidity events in the past 12 months during which the system served water to the public, or more than 5 high turbidity events in the past 120 months during which the system served water to the public, in which the turbidity level exceeded 5 NTU.N.H. Code Admin. R. Env-Ws 380.06
#5098, eff 3-18-91, EXPIRED 3-18-97
New. #6521, eff 6-4-97 (See Revision Note at chapter heading for Env-Ws 300); ss by #8352, eff 5-14-05 (formerly part of Env-Ws 380.05 )