The Charles River Pollution Control District is a regional wastewater treatment plant located in Medway, Massachusetts. The facility provides tertiary treatment of wastewater and septage from domestic, commercial, and industrial sources from the Towns of Medway, Franklin, Bellingham, and Millis. Septage is also accepted from the Towns of Norfolk, Sherborn, Dover, Wrentham, Weston, Holliston, and Sharon. The treated effluent discharges into the Upper Charles River and is regulated by a National Pollutant Discharge Elimination System (NPDES) permit which is jointly enforced by the US Environmental Protection Agency (US EPA) and the Massachusetts Department of Environmental Protection (MassDEP). The facility is designed to treat 5.7 million gallons per day (mgd).
The Charles River Pollution Control District treats the communities' wastewater by performing several physical, chemical and biological processes before discharging the environmentally safe water into the Charles River. The wastewater is treated to meet the EPA's discharge permit limitations.
The collection system consists of Town and District owned sewer pipes. The system has over 238 miles of sewer pipes and 37 pump stations, including approximately 13 miles of District owned interceptors and one District owned pump station.
The District manages a Geographic Information System (GIS) that is used to support the operation and maintenance activities of the Sewer Collection System.