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OLS Field Name OLS Field Data
Main Title Compliance concerns with the new coliform regulation /
Author Geldreich, Edwin E.
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher Risk Reduction Engineeering Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1992
Report Number EPA/600/A-92/093
Stock Number PB92-179696
Additional Subjects Coliform bacteria ; Water supply ; Potable water ; Regulations ; Compliance ; Water treatment ; Biofilms
Holdings
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Status
NTIS  PB92-179696 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 8 pages ; 28 cm
Abstract
The search for the presence or absence of coliforms in the water supply has made the recognition of a biofilm more obvious than ever before. Sorting out the true coliform biofilm issue from the presence of hidden contamination is of utmost importance. Careful characterization of incipient and recurring seasonal biofilms needs to consider the record of the health status in the community, treatment operations at the water plant, evidence of fecal contamination in the distribution system, and identification of the coliforms detected. Repeat sampling requirements may present a 'Catch 22' situation for some water supplies whose samples yield growth but no detectable coliforms. Guidance is needed in these situations to encourage an appropriate action response involving flushing and disinfecting the pipe line rather than continuing useless reexamination of water samples from the site. The fear of fecal coliforms in every repeat sample analysis of positive coliforms is unfounded. Properly treated water with protected distribution of the treated water will yield less than one fecal coliform positive sample for every one thousand repeat samples examined.
Notes
"Presented at Technology Conference Proceedings, Part II, Sessions EB trough ST6 - AWWA Water Quality Technology Conference, November 10-14, 1991, Orlando, Florida. P:1327-1331." Includes bibliographical references and index. Microfiche.