Introduction: The calibration, verification, and validation of calcium (Ca), chloride (Cl), and sulfate (SO 4 ) module of the Lake Okeechobee Environment Model (LOEM) was completed. The integrated model could simulate Ca, Cl, and SO 4 concentrations and transport due to wind driven currents and waves from 1 Oct 1999 to 30 Sept 2009 in Lake Okeechobee. The enhanced model was also used to estimate lake water quality effects resulting from different management scenarios that include discharges from planned aquifer storage and recovery (ASR) facilities.