Effluent from anaerobic or aerobic treatment systems requires second- ary treatment before it can be released to soil, groundwater or surface water. Secondary treatment incorporates adhesion and additional microbiological breakdown of waste particles and bacteria on filtering media such as gravel, soil or sand.
Save The River® Upper St. Lawrence Riverkeeper®
Save The River is a non-profit, member-based environmental organization whose mission is to preserve and protect the ecological integrity of the Upper St. Lawrence River through advocacy, education and research.