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OLS Field Name OLS Field Data
Main Title Comparing Three Sampling Designs for Monitoring Coliforms in Small Community Water Systems.
Author Stukel, T. A. ; Reed, F. C. ; Greenberg, E. R. ; Jacobs, N. J. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab. ;Dartmouth Medical School, Hanover, NH.
Year Published 1987
Report Number EPA/600/J-87/250;
Stock Number PB88-177191
Additional Subjects Sampling design ; Reprints ; Water pollution detection ; Coliform detection ; Spatial cluster design ; Sample frequency ; Small water systems
Holdings
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NTIS  PB88-177191 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 7p
Abstract
Three sampling designs: weekly, monthly and spatial cluster are compared as to their effectiveness in detecting coliform contamination in small community drinking water systems. Water samples were collected over a one-year period from fifteen drinking water systems in rural communities of Vermont and New Hampshire. Sampling five times per month, whether samples were collected simultaneously at five different sites within a system (spatial cluster) or once a week at the same site, detected between 50 and 100% more contaminated situations than were found by sampling once per month. The spatial cluster design was slightly more sensitive than the weekly sampling design in its ability to detect coliform contamination.