Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title U.S. EPA (Environmental Protection Agency) perspective on AOC (Assimilable Organic Carbon) research as related to coliform colonization and compliance problem {microfiche}
Author Reasoner, D. J. ; Rice, E. W.
CORP Author Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div.
Publisher For sale by the Supt. of Docs., U.S. G.P.O.,
Year Published 1990
Report Number EPA/600/D-89/267
Stock Number PB90-132473
Additional Subjects United States.--Environmental Protection Agency ; Water treatment ; Potable water ; Coliform bacteria ; Carbon ; Water pollution control ; Microorganisms control(Water) ; Disinfection ; Nutrients ; Byproducts ; Biologically stable substances ; US EPA ; Compliance ; Ozonation
Library Call Number Additional Info Location Last
NTIS  PB90-132473 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
The biological stability of treated drinking water has become a major concern for water utilities. The U.S. E.P.A. is concerned from the perspective of coliform MCL compliance and remediation of coliform biofilm problems. The levels of readily assimilable nutrients present in treated water are affected by water treatment processes, but of greatest concern are those processes, such as ozonation, that cause increases in the levels of assimilable organic carbon (AOC) and therefore contribute to biological instability of the water. Thus, the combined use of ozonation (pre-oxidant) and a lower disinfectant residual as an approach to reducing disinfectant byproducts may result in increased bacterial growth, including coliforms, in the distribution system. Information is needed on: the AOC flux level that stimulate coliform growth in biofilm: the specific nutrients and concentrations that can stimulate growth of both coliforms and HPC; treatment strategies to reduce AOC levels and strategies to effectively control biofilm formation where AOC levels cannot be reduced.