Assessment of physico-chemicals of Gundalamma Lake, Tumkur was done during period of Jan-2016 to Dec-2016. Lake water is a source for ground water level increase in the surrounding areas of Tumkur city, its may helpful in Bore wells recharge for drinking domestic and fish culture purpose. The analysis was carried out for the parameters like temperature, conductivity, turbidity, TDS, TSS, pH, Total Hardness, Ca, Mg, alkalinity, COD, BOD, DO, etc., the study report discusses about the analysis of lake water quality.