Water is the foremost necessity of all living beings. The components which are dissolved in water determines the water quality for the growth of plants and animals. The requirement of adequate nutrients, pleasant and healthy environment is necessary for the growth of aquatic organisms. The productivity of the organisms present in water depends on the physicochemical characters. The productivity is at its maximum by the presence of optimum levels of physico chemical parameters. Water quality of Varahanadhi River was assessed in the study at different locations for an annual year by measuring the various physico chemical parameters with the standard certified methods. Three different regions such as upstream, midstream and downstream and three different seasons were chosen for the present study.Downstream region was found to be polluted with heavy metals that might have adverse effects on the humans who consume the fishes from the river.

Keywords: River; seasons; pollution; water.