171 plants indexed.
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.
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.
Cheltenham WWTP is a secondary treatment facility serving 220 people in Cheltenham, Maryland. It discharges treated wastewater into the local watershed, contributing to the Chesapeake Bay basin.
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.
Victor Cullen WWTP is a secondary treatment plant in Sabillasville, Maryland, serving 135 people. It discharges 68.14 thousand cubic meters per year into local waterways.
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.
Greenridge Forestry Camp in Allegany County, Maryland, treats wastewater with advanced processes for a small population of 304. The plant discharges 37.85 million gallons per year, operating under U.S. Clean Water Act regulations.
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.
New Germany State Park wastewater treatment plant in Maryland serves 600 people with secondary treatment. It discharges 37.85 m³/day and has a designed capacity of 113.56 m³/day.
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.
Swallow Falls State Park wastewater treatment plant in Garrett County, Maryland, serves 1,000 people with secondary treatment. It discharges 37.85 cubic meters daily into local waterways.
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.
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.
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.
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.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, Point Lookout State Park WWTP has the highest designed capacity at 1,401 m3/day.