Study of some water quality parameters of Kolong riverine system of Nagaon, India

The study was carried out for a period of two seasons (Pre-monsoon) and that of the (Post-monsoon) in the year 2011. Samples of water from two sites of the River Kolong in Nagaon District of Assam, India, were analysed. The physico chemical parameters such as pH, conductivity (EC), Alkalinity, Total suspended solids (TSS), Hardness, Chloride, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD) and COD etc were evaluated. The river is subjected to severe domestic and sewage pollution at two selected sites of Nagaon town, Assam, India. At sampling site I and II physicochemical parameters were not found to be within the safe limits of drinking water as prescribed by World Health Organization W.H.O. (1984). The present studies indicate increase in water pollution levels in the River Kolong due to discharge of various types of waste water, sewage and effluents.