The present investigation deals with the ecological studies of Saroornagar lake, Hyderabad. Itis one of the prominent lake was to provide water for domestic purposes and irrigation of farm lands. The lake is heavily polluted in the recent years with rapid urbanization in the catchment and command areas and also with population explosion. Hence it is very important to assess the degree of pollution and water quality. Comprehensive physico-chemical analysis was carried out by collecting samples from four different sampling stations for a period of one yearto determine various physico-chemical parameters for evaluating Water Quality. Chlorides, total hardness, calcium, magnesium, phosphates, sulphates, BOD, total solids and total dissolved solids were recorded in very high concentrations and dissolved oxygen is in very low concentration indicating severe water quality deterioration, high degree of pollution and eutrophication of Saroornagar lake. Hence, it is unsuitable for drinking, domestic and recreational Purposes.