Mahesh Kumar. M. K., M.K.Mahesh, Sushmitha.B.R
A water quality index (WQI) developed by the Canadian council of ministers of the Environment (CCME) was applied to chikkakere , a lake at Periyapatna, Mysore district , Karnataka state, India to study its impact on the protection of aquatic life. The index in the lake is rated as poor. The water quality is almost endangered or deteriorated and the conditions often deviate from natural levels, Microcystis aeruginosa blooms are dominant in the lake. These permanent blooms often cause huge fish kills. Nitchzia species are also dominant among Bacillariophyaceae indicating pollution. Overall the lake water is unable to protect aquatic life. The water quality failed to satisfy the parameters and its use for purposes like Drinking, Aquatic, Recreation, irrigation and livestock.