171 plants indexed. Showing 35 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.
Leonardtown STP is a municipal wastewater treatment plant serving 2,300 people in Leonardtown, Maryland, USA. It operates under the US Clean Water Act with NPDES permitting.
Marley Taylor WRF serves Saint Mary's County, Maryland, treating wastewater for over 45,000 people. The plant is located near the Chesapeake Bay, a major estuary on the Atlantic coast.
Centreville WWTP serves approximately 4,285 residents in Centreville, Maryland. The plant has a designed capacity of 1.00 million gallons per day and operates under U.S. EPA NPDES regulations.
Kent Nrrws_Stevensville_Grasonville serves approximately 15,826 people in Stevensville, Maryland. The plant discharges treated wastewater into the Chesapeake Bay watershed, a vital estuarine ecosystem.
Cambridge WWTF and Coll Sys serves Cambridge, Maryland, treating wastewater for approximately 14,722 residents. The plant is located near the Chesapeake Bay, an ecologically sensitive estuary.
La Plata WWTP serves approximately 20,000 residents in La Plata, Maryland. The plant operates under the U.S. Clean Water Act, with a designed capacity of 1.00 million gallons per day.
Indian Head WWTP serves approximately 3,400 people in Indian Head, Maryland. The plant is located within 50 km of the coast and discharges into the Potomac River watershed.
Swan Point WWTP serves La Plata, Maryland, treating wastewater for approximately 945 people. The plant operates under US EPA NPDES regulations, discharging into the Potomac River watershed.
Mattawoman WWTP in Waldorf, Maryland serves over 90,000 people. The plant is located within 50 km of the coast and discharges into the Potomac River basin.
Chesapeake Beach WWTP serves approximately 10,672 residents in Calvert County, Maryland. The plant discharges treated wastewater into the Chesapeake Bay watershed, a major estuarine ecosystem on the U.S. East Coast.
Solomons Island WWTP in Lusby, Maryland serves approximately 7,000 people. The plant operates under the US Clean Water Act and discharges treated wastewater into the Chesapeake Bay watershed.
Perryville WWTP serves approximately 4,200 people in Perryville, Maryland, USA. The plant is located near the coast and operates under the US Clean Water Act regulatory framework.
Elkton WWTP serves approximately 13,750 people in Elkton, Maryland. The plant operates under the US Clean Water Act NPDES permit program, discharging treated wastewater into the Chesapeake Bay watershed.
Seneca Point NERAWWTP serves Town Commons, Maryland, treating wastewater for a population of 17,301. The plant operates under the US Clean Water Act framework, with a designed capacity of 1.00 million gallons per day.
Piscataway WWTP in Accokeek, Maryland serves approximately 150,827 people. The plant discharges treated wastewater within 50 km of the coast, contributing to the protection of the Chesapeake Bay watershed.
Havre de Grace WWTP serves 11,000 people in Havre de Grace, Maryland. The plant discharges treated wastewater into the Chesapeake Bay watershed, a vital estuarine ecosystem.
Aberdeen WWTP serves approximately 15,982 people in Aberdeen, Maryland, USA. The plant has a designed capacity of 1.00 million gallons per day and is located within 50 km of the coast.
SOD RUN WWTP serves approximately 91,500 people in Chelsea, Maryland. The facility is located within 50 km of the coast and operates under U. S. EPA NPDES regulations.
Annapolis City WWTP serves 43,538 people in Annapolis, Maryland, as part of the region's municipal wastewater infrastructure. The plant is located within 50 km of the coast, discharging into the Chesapeake Bay watershed.
MAYO WWTP in Edgewater, Maryland serves approximately 6,720 people. The plant operates under U.S. EPA and Maryland Department of the Environment regulations, discharging treated wastewater into the Chesapeake Bay watershed.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, LEONARDTOWN STP has the highest designed capacity at 1 m3/day.