Regulacje i polityka gospodarcza · 16/12/1998

National Primary Drinking Water Regulations: Interim Enhanced Surface Water Treatment

In this document, EPA is finalizing the Interim Enhanced Surface Water Treatment Rule (IESWTR). The purposes of the IESWTR are to: Improve control of microbial pathogens, including specifically the protozoan Cryptosporidium, in drinking water; and address risk trade- offs with disinfection byproducts. Key provisions established in today's final IESWTR include: A Maximum Contaminant Level Goal (MCLG) of zero for Cryptosporidium; 2-log Cryptosporidium removal requirements for systems that filter; strengthened combined filter effluent turbidity performance standards and individual filter turbidity provisions; disinfection benchmark provisions to assure continued levels of microbial protection while facilities take the necessary steps to comply with new disinfection byproduct standards; inclusion of Cryptosporidium in the definition of ground water under the direct influence of surface water (GWUDI) and in the watershed control requirements for unfiltered public water systems; requirements for covers on new finished water reservoirs; and sanitary surveys for all surface water systems regardless of size. The IESWTR builds upon the treatment technique requirements of the Surface Water Tr