Evaluation of coliforms as indicators of water quality in India

P W Ramteke¹, J W Bhattacharjee, S P Pathak

¹Division of Aquatic Toxicology, Industrial Toxicology Research Centre, Lucknow, India.

The Journal of Applied Bacteriology

|April 1, 1992

Abstract:

The total and thermotolerant coliform counts in rural drinking water derived from ground water, piped supplies and surface water are reported for a number of areas in India. To evaluate these counts as indicators of recent faecal contamination the total coliforms and thermotolerant coliforms isolated have been identified. Thermotolerant Escherichia coli formed 11.7% of the total coliforms and 75.1% of the thermotolerant coliforms. Citrobacter sp. (20.4%) and Klebsiella sp. (50.9%) were the other common total coliforms isolated and, among the thermotolerant coliforms, Klebsiella sp. (16.4%) was the only other organism frequently encountered. The total coliform counts were significantly correlated with water temperature. The applicability in tropical areas of standards developed for temperate climates is discussed.

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