Coomba Park catchment improvement project

This project assessed the nature and extent of impact of on-site systems on surface water and groundwater and investigated the impacts of on-site system density. Systems in a densely developed lakeside village were mapped using GIS and surface drainage systems mapped and monitored to determine the subcatchments. Individual systems most contributory to contamination in Wallis Lake, the site of a previous Hepatitis outbreak in oysters, were identified. Measures to address or alleviate the problems caused by failing on-site systems were identified for Great Lakes Council.