Assessment of water quality of Rasthapur lake, Shahapur taluk, Yadgir district, Karanataka

The present study aims at assessing water quality of Rasthapur lake situated in Shahapur taluk of Yadgir district, Karnataka state to know the status and suitability of lake water for human consumption. For this, surface water sample was collected for a period of three seasons. The collected water sample subjected to analysis of various physico-chemical parameters viz. air and water temperature, pH, EC, TDS, total alkalinity, DO, BOD, total hardness, Ca2+, Mg2+, Cl-, SO42-, NO3-, and PO43-. According to classification of lake on the basis of total alkalinity and total hardness lake was nutrient rich during all seasons and falls in the category of moderately hard during rainy and winter season and hard category in summer season respectively. The overall water quality index(WQI) shows that Rasthapur lake water belongs to good water class. All the physico-chemical parameters concentration was well within the permissible limit of drinking water standards.