171 plants indexed. Showing 56 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.
Vienna WWTP is a secondary treatment facility serving 548 people in Vienna, Maryland. It discharges 147.63 million gallons per year and has a designed capacity of 518.60 million gallons.
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.
Fort Frederick State Park wastewater treatment plant in Four Locks, Maryland serves approximately 100 people with secondary treatment. It discharges 37.85 m³/day into the local watershed.
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.
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.
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.
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.
Smithsburg WWTP is a secondary treatment plant serving 1,826 residents in Smithsburg, Maryland. It discharges 779.80 thousand cubic meters of treated wastewater annually, with a designed capacity of 2,271.24 thousand cubic meters.
Funkstown WWTP is a secondary treatment plant in Washington County, Maryland, serving 1,214 people. It discharges 348.26 million gallons per year and operates under U.S. EPA NPDES regulations.
Sandy Hook WWTP is a secondary treatment facility in Sandy Hook, Maryland, serving 145 people. It discharges 49.21 million gallons per year and has a designed capacity of 113.56 million gallons.
Antietam WWTP in Sharpsburg, Maryland, serves 1,373 people with secondary treatment. The plant discharges 605.67 million gallons per year into the Potomac River 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.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, SMITHSBURG WWTP has the highest designed capacity at 2,271 m3/day.