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.
Charlotte Hall Veterans Home WWTS is a secondary treatment plant in Charlotte Hall, Maryland, serving 704 people. It discharges treated wastewater near the coast, with a designed capacity of 329.33 volume units.
Manchester Park WWTP Private is an advanced treatment plant in Singerly, Maryland, serving 173 people. It discharges 75.71 units of treated wastewater and is located within 10 km of the coast.
Richlyn Manor WWTP is a secondary treatment plant in Honeygo, Maryland, serving 738 people. It discharges treated wastewater near the Gunpowder Falls Trail, within 10 km of the coast.
Industrial Park WWTP in Calvert Mobile Home Park, Maryland, serves 300 people with secondary treatment. It discharges treated wastewater near the Chesapeake Bay, a major estuary on the U.S. East Coast.
Prince Frederick WWTP II is an advanced treatment facility in Prince Frederick, Maryland, serving approximately 1,193 people. It discharges treated wastewater near the Chesapeake Bay, a major estuary on the U.S. East Coast.
Prince Frederick WWTP I is an advanced treatment plant serving 1,665 people in Buena Vista Hills, Maryland. It discharges 700.30 units of treated wastewater daily, with a designed capacity of 1703.43 units.
TRAPPE WWTP in Locust Grove, Maryland, serves 1,201 people with advanced treatment. It discharges 382.33 million gallons annually and has a designed capacity of 757.08 million gallons.
Betterton WWTP is a secondary treatment plant in Betterton, Maryland, serving 510 people. It discharges 94.64 m³/day of treated wastewater within 10 km of the Chesapeake Bay coast.
Twin Cities WWTP in Dorchester County, Maryland, serves a small population of 998 with secondary treatment. The plant discharges 423.97 units of treated wastewater and has a designed capacity of 1063.70 units.
Assateague State Park TP is an advanced wastewater treatment plant in Franklin Heights, Maryland, serving 425 people. It discharges 37.85 m³/day and is located within 10 km of the Atlantic coast.
Poplar Hill wastewater treatment plant in Royal Oak, Maryland serves 250 people with primary treatment. It discharges 90.85 million gallons per year near the Chesapeake Bay.
PORT DEPOSIT WWTP is an advanced treatment plant serving Port Deposit, Maryland, USA. It discharges 454.25 million gallons per year and has a designed capacity of 567.81 million gallons per year.
Elk Neck State Park wastewater treatment plant in Maryland serves 900 people with secondary treatment. It discharges 37.85 megaliters annually and is located within 10 km of the coast.
Point Lookout State Park WWTP is a secondary treatment plant in Saint Mary's County, Maryland, serving 2,770 people. It discharges 75.71 million gallons per year and is located within 10 km of the coast.
Southern MD Prerelease U is a secondary treatment plant in Cameron Ridge, Maryland, serving 230 people. It discharges 75.71 units of treated wastewater near the Chesapeake Bay watershed.
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.
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.
Oxford WWTP is a secondary treatment plant serving 750 people in Oxford, Maryland. It discharges treated wastewater near the Chesapeake Bay, a major estuary on the U.S. East Coast.
Martingham Wastewater Treatment System serves 719 people in Saint Michaels, Maryland, discharging secondary-treated wastewater near the Chesapeake Bay.
Talbot County Region V WWTP is a secondary treatment plant serving 900 people in Tilghman Island, Maryland. It discharges treated wastewater near the Chesapeake Bay, a major estuary on the U.S. East Coast.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, Prince Frederick WWTP I has the highest designed capacity at 1,703 m3/day.