Environmental pollution is woven in the entire fabric of our modern style of living. Every few years the world is getting a severe shock of pollution disasters. Now a days water pollution is one of the serious problem in all over world. Life cannot exist without water. For day to days process water is essential. Water covers about 2/3 part of the surface (97.02%) most of it is salty for use, only 2.15% of the world’s available water is not salty. Rain water is purposed by water. We are using water for domestic purpose industrial purpose and Agricultural production water is not only essential for survival of all living thing but also the source of economic wealth and creator of beautiful environment. The major factors influencing water pollution are following. 1) Growing population 2) Inefficient irrigation system 3) Pollution Study of the toxic element causing water pollution in River Krishna of Sangli District physico-chemical characteristics of River water were analyzed Water samples were collected from five different location’s of River Krishna at Sangli District. Sample were analyzed by using various parameter such as Colour, Odor, T S, TDS, TSS, DO, COD, BOD, PH, Total Hardness, Available Nitrate, Phosphate’s, Chlorides, Turbidity, Ca, Mg with standard methods. Physico Chemical Analysis it has been observed that, values of TDS, COD, BOD, Turbidity, TS, Chlorides. Alkalinity are above the normal limit. A Few samples are hard and shows salinity such samples are not portable. While few samples are moderately hard, by giving proper treatment such hard water is converted to soft water and used for domestic and irrigation purposes.