171 plants indexed. Showing 38 matching current filters.
Maryland's wastewater treatment is regulated by the Maryland Department of the Environment. Major plants include Blue Plains (serving the DC metro) and Back River (Baltimore). UtilityRadar indexes 171 wastewater treatment plants in Maryland with a combined designed capacity of 58,285 m³/day. The largest plant on file is Winebrenner WWTP, treating 3,785 m³/day.
Maryland's wastewater treatment is regulated by the Maryland Department of the Environment. Major plants include Blue Plains (serving the DC metro) and Back River (Baltimore).
UtilityRadar's directory currently lists 171 wastewater treatment plants across Maryland. Together these plants represent a combined designed capacity of approximately 58,285 m³/day.
By treatment level, the directory contains 56 secondary, 38 advanced, 1 primary-treatment plants. Secondary treatment (typically activated sludge with biological nutrient removal) is the most common standard.
The largest plant indexed for Maryland is Winebrenner WWTP, with a designed capacity of 3,785 m³/day.
Plant records are aggregated from publicly available regulatory data (US EPA ECHO, EU UWWTD reporting, national water authority publications), augmented by direct operator information and verified via Google Maps coordinates. Each record includes location, treatment level, capacity where known, operator and operational status. To browse plants by treatment level worldwide, see our secondary and advanced filter views, or read our guide to how sewage treatment works.
Rocky Gap State Park wastewater treatment plant serves 2,542 people in Allegany County, Maryland, with advanced treatment and a capacity of 454.25 units. It discharges treated effluent into the local watershed, supporting the Chesapeake Bay ecosystem
Bowie State College STP in Upper Marlboro, Maryland, serves 3,857 people with advanced treatment. The plant discharges 681.37 thousand cubic meters annually, operating under US EPA NPDES regulations.
Deep Creek Lake State Park wastewater treatment plant in Garrett County, Maryland, serves a small population with advanced treatment. It discharges treated water into the local watershed, supporting the region's environmental health.
Greenbrier State Park wastewater treatment plant in Doubs Mill, Maryland, serves 1,500 people with advanced treatment. It discharges 37.85 megaliters annually, operating under US EPA NPDES regulations.
Eastern Prerelease STP in Queen Anne's County, Maryland, serves 497 people with advanced treatment. The plant discharges 37.85 m³/day and has a designed capacity of 113.56 m³/day.
Newark STP is an advanced wastewater treatment plant in Newark, Maryland, serving 224 people. It discharges 87.06 thousand cubic meters annually and operates under the US Clean Water Act.
Sharptown WWTP is an advanced treatment facility serving 670 residents in Sharptown, Maryland. It discharges 427.75 million gallons per year into local waterways.
Hebron WWTP is an advanced treatment facility in Wicomico County, Maryland, serving 730 people. It discharges 166.56 volume units daily and is located within 10 km of the coast.
PITTSVILLE WWTP is an advanced treatment facility serving 1,100 people in Pittsville, Maryland. It discharges 299.05 million gallons per year and operates under U.S. EPA NPDES regulations.
Willards WWTP is an advanced treatment facility serving 940 people in Willards, Maryland. It discharges 302.83 units of treated wastewater, operating under U.S. Clean Water Act regulations.
Hancock STP is an advanced wastewater treatment plant serving 1,700 people in Hancock, Maryland. It discharges treated water into the Potomac River watershed, contributing to Chesapeake Bay water quality.
Clear Spring WWTP is an advanced treatment plant serving 570 people in Washington County, Maryland. It discharges 268.76 units of treated wastewater daily, with a designed capacity of 1135.62 units.
Winebrenner WWTP is an advanced treatment facility in Highfield Cascade, Maryland, serving 3,157 people. It discharges 522.39 volume units daily with a designed capacity of 3,785.40 units.
Tylerton WWTP is an advanced treatment plant serving 173 people in Tylerton, Maryland, USA. It discharges 22.71 m³/day of treated wastewater near the Chesapeake Bay.
Chopticon High School WWTP in Morganza, Maryland, serves 1,844 people with advanced treatment. The plant discharges 3.79 million gallons per day into local waterways near the Chesapeake Bay.
Wicomico Shores WWTP is an advanced treatment plant in Barbers Quarter, Maryland, serving 1,254 people. It discharges 420.18 units of treated wastewater and operates near the Chesapeake Bay.
Forest Farm WWTF is an advanced treatment plant in Saint Mary's County, Maryland, serving 882 people. It discharges treated wastewater near the Chesapeake Bay, supporting local water quality.
St Clement s Shores WWTP is an advanced treatment plant in Compton, Maryland, serving 706 people. It discharges 321.76 units of treated wastewater near the Chesapeake Bay.
Rock Hall WWTP is an advanced treatment facility serving 1,945 people in Rock Hall, Maryland. It discharges treated wastewater into the Chesapeake Bay watershed, operating under U.S. EPA NPDES regulations.
Middletown East WWTP is an advanced treatment facility serving approximately 1,200 residents in Middletown, Maryland. It discharges 666.23 thousand cubic meters of treated wastewater annually.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, Winebrenner WWTP has the highest designed capacity at 3,785 m3/day.