171 plants indexed. Showing 34 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.
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.
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.
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.
FAIRMOUNT STP is a secondary treatment plant serving 570 people in Landonville, Maryland. It discharges 98.42 million gallons per day and is located within 10 km of the coast.
Ewell Rhodes Point WWTP is a secondary treatment plant serving 600 people in Rhodes Point, Maryland. It discharges 75.71 million gallons annually and is located within 10 km of the coast.
QUEENSTOWN WWTP is a secondary treatment plant serving 617 people in Queenstown, Maryland. It discharges 238.48 units of treated wastewater daily, with a designed capacity of 757.08 units.
Tolchester WWTP is a secondary treatment plant in Georgetown, Maryland, serving about 1,467 people. It discharges treated wastewater near the Chesapeake Bay, a major estuary on the U.S. East Coast.
Kennedyville STP is a secondary treatment plant serving 234 people in Kennedyville, Maryland. It discharges 75.71 thousand cubic meters per year with a designed capacity of 227.12 thousand cubic meters per year.
Worton_Butlertown STP is a secondary treatment plant serving 556 people in Worton, Maryland. It discharges 128.70 units of treated wastewater daily, with a designed capacity of 374.75 units.
Jude House Package WWTP Bel Alton WWTP is a secondary treatment facility serving 345 people in Chapel Point Woods, Maryland. It discharges 37.85 megaliters of treated wastewater annually.
Mt Carmel Woods WWTP is a secondary treatment plant in Waldorf, Maryland, serving about 200 people. It discharges treated wastewater near the Potomac River and Chesapeake Bay.
Cobb Island WWTP is a secondary treatment plant serving approximately 1,920 people in Bryantown, Maryland. It discharges 215.77 thousand gallons per day and has a design capacity of 598.09 thousand gallons per day.
Ridgely WWTP is a secondary treatment plant in Oakland, Maryland, serving 1,600 people. It discharges 469.39 thousand cubic meters annually and operates under the US Clean Water Act.
Preston WWTP is a secondary treatment plant in Tanyard, Maryland, serving 719 people. It discharges 121.13 million gallons per year into local waterways.
Rising Sun STP is a secondary treatment plant serving 2,600 people in North Hills, Maryland. It discharges 810.08 thousand gallons per day into the Susquehanna River basin, ultimately reaching the Chesapeake Bay.
Chesapeake City South STP is a secondary treatment plant serving 400 people in North Chesapeake City, 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, RISING SUN STP has the highest designed capacity at 1,893 m3/day.