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The water quality of the Maha Oya stream that runs across the University of Peradeniya, was determined using water samples collected from four different locations along the stream. Water samples were assessed for selected bacteriological parameters, temperature, pH and turbidity, during the wet and dry seasons, at weekly intervals over a period of 5 weeks in each season. A sociological survey was conducted concurrently to study the impact of two communities (line house and agricultural) living along the stream bank, on water quality. The bacteriological analysis revealed that stream water is not suitable for drinking or bathing at any of the locations, according to Sri Lankan standards and WHO guidelines. Temperature, pH and turbidity of stream water fluctuated among the locations investigated according to geographical and environmental factors and run off into the stream. The sociological survey revealed direct discharge of faecal matter into the stream at certain locations. Both, agricultural and line house communities were aware of pollution of water in the stream. The study revealed the unsanitary quality of water in the Maha Oya and the need to implement suitable methods of solid waste and waste water disposal. Key words: total coliform, faecal coliform, sociological survey doi: 10.4038/cjsbs.v36i2.488 Cey. J. Sci. (Bio. Sci.) 36 (2): 134-137, 2007

Water quality of Maha Oya stream in Peradeniya