In recent years, monitoring quality of water body or reservoir has become a main concern for the determination of current condition and long-term pattern for future management. This study focused on hydrology properties and water quality of Sembrong Dam in Johor, Malaysia. The result indicated that soil loss about 487.12kg/km2/day, for rainfall and evaporation records are 1862mm and 1098mm for hydrology properties; Sembrong dam categorized as Class III according to NWQS. Sembrong dam need a treatment for further environmental technology in the future.