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CHARACTERIZING SURFACE WATERS THAT MAY NOT REQUIRE FILTRATION
Citation:
Geldreich, E., J. Goodrich, AND R. Clark. CHARACTERIZING SURFACE WATERS THAT MAY NOT REQUIRE FILTRATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/408 (NTIS PB91171637).
Description:
A relatively clean raw surface water can be determined that is amenable to disinfection as the only controlling treatment process. The essential criteria and associated standards are: ecal coliform, 20 organisms/100 mL; Turbidity, 1.0 NTU; Color, 15 ACU; Chlorine Demand, 2 mg/L. These criteria were selected from a study of a variety of data gathered from 34 raw source waters used by utilities in full scale application of disinfection as the only treatment process. election of water characteristics was based on the potential for impact on disinfection effectiveness and magnitude of fecal pollution tolerated. atershed management is an essential aspect of controlling water quality fluctuations and in preventing progressive deterioration in the raw water resource. Monitoring data should not only be utilized to form a continual historical record that demonstrates water quality suitability for minimal treatment but also as an integral part of guidance in making day to day changes in process control to avoid any chance for microbial penetration into the public water supply.