The waters in some of the community water‐supply systems in the US often contain a myriad of microorganisms that carry past the disinfection barrier. Although the majority of those that survive and flourish are not pathogenic, the situation presents a potential danger. Here is an article on the sort of organisms that contribute to the trouble, with a description of factors relating to propagation of the species.
Part of the Safe Drinking Water Act stipulates that communities provide for emergency supplies of water that are safely free of bacteria. This article, in addition to documenting findings about bacterial counts for bot tled water, provides data and recommendations con cerning emergency water supplies. E. E. GELDREICH ET AL 117
Adequate appraisal of the status of stored water quality and the detection of subtle ecological changes that may be occurring requires a microbiological sampling protocol that is sensitive to the three‐dimensional aspects of a large body of water.
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