Correlation of coliform growth response with other water quality parameters.
Rice-EW; Scarpino-PV; Reasoner-DJ; Logsdon-GS; Wild-DK
J Am Water Works Assoc 1991 Jul; 83(7):98-102
An analysis was conducted on a variety of water types taken from various different geographical areas at different points along the water treatment process for their ability to support coliform bacterial growth. The samples included raw source water, ozonated raw source water, partially treated water, finished water, and finished water exposed to ozone in the treatment process. The study results indicated that significantly higher coliform growth responses were associated with waters that had been subjected to ozonation. The differences between mean levels of assimilable organic carbon and the various treatment types were not significant, although differences between finished water samples exposed to ozone and those that were not approached levels of significance. The authors note that the lack of a significant positive correlation between the coliform growth response and any of the measured chemical parameters is indicative of the complex nutritional requirements of these coliforms. The authors suggest that the nutrient status of drinking water can only be determined by bioassay procedures and conclude that the coliform bioassay procedure is a useful method to ascertain the biological stability of drinking water supplies.
NIOSH-Author; Water-sampling; Drinking-water; Microorganisms; Environmental-pollution; Water-analysis; Water-purification; Microorganisms; Bacterial-disease; Bacterial-infections
Journal of the American Water Works Association