This study was aimed to estimate physico-chemical characteristic of Harsi reservoir. Harsi reservoir located in Dabra, Gwalior district, Madhya Pradesh is constructed on parwati River. Monthly study in physico-chemical parameters such as water temperature, depth, transparency, electrical conductivity, turbidity, total dissolved solids, pH, dissolved oxygen, free carbon dioxide, total alkalinity, total hardness, chlorides, sulphates, nitrate, nitrite, phosphate, silicates, ammonia, BOD, COD, calcium, magnesium, sodium, potassium were analyzed from January 2011 to December 2011. The results indicated that physico-chemical parameters of the water were used for drinking, domestic use, irrigation and pisciculture.