In present work an attempt has been made to assess the variations in physico-chemical parameters in the lake waters of Pedda Cheruvu lake Dubbak, Siddipet District, Telangana state. The study is carried out for a period of one year from may 2015 to April 2016. Monthly data has been collected and assessed seasonally. Different Physico-Chemical parameters like Air Temperature, Water Temperature, Turbidity, pH, DO, Calcium, Magnesium, Chlorine, Phosphates, Nitrates, Nitrites, Sulphates and Silicates were analyzed at monthly intervals. The results indicate that the lake is progressing towards eutrophication.