171 plants indexed. Showing 116 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.
OLDTOWN WWTP is a secondary treatment plant serving 430 people in Oldtown, Maryland. It discharges 45.43 million gallons per year into local waterways.
Flintstone Gilpin WWTP is a secondary treatment plant serving 450 people in Allegany County, Maryland. It discharges 189.27 cubic meters of treated wastewater daily.
Barton Business Park WWTP is a secondary treatment plant in Bier, Maryland, serving approximately 490 people. It has a designed capacity of 189.27 m³/day and discharges 75.71 m³/day of treated wastewater.
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.
Spring Meadows WWTP is a secondary treatment plant serving 153 people in Spring Meadows, Maryland. It discharges 30.28 thousand cubic meters per year into local waterways.
Union Bridge WWTP is a secondary treatment plant serving about 950 people in Union Bridge, Maryland. It discharges treated wastewater into local waterways, supporting the Chesapeake Bay watershed.
New Windsor WWTP is an advanced treatment facility serving 1,500 people in Maryland, USA. It discharges treated wastewater into local waterways, operating under the US Clean Water Act.
Pleasant Valley WWTP is a secondary treatment plant in Carroll County, Maryland, serving 145 people. It discharges treated wastewater into local waterways, supporting the Chesapeake Bay watershed.
Conococheague WWTP serves Washington County, Maryland, treating wastewater for approximately 11,423 people. The plant discharges into the local watershed, ultimately draining to the Chesapeake Bay.
Joppatowne WWTP is a municipal wastewater treatment plant serving approximately 7,000 residents in Joppatowne, Maryland, USA. The facility discharges into the Chesapeake Bay watershed.
Seneca Creek WWTP serves Germantown, Maryland, treating wastewater for approximately 77,000 residents. The plant operates under the U. S. Clean Water Act, with discharge regulated by the Maryland Department of the Environment.
Damascus WWTP serves The Plantations, Maryland, treating wastewater for approximately 4,920 residents. The plant operates under U.S. EPA and state regulations, discharging treated effluent to local waterways.
Poolesville STP is a municipal wastewater treatment plant serving approximately 3,800 residents in Poolesville, Maryland, United States. The facility operates under the U.S. Clean Water Act framework.
Upper Potomac River Comm WWTP serves Westernport, Maryland, treating wastewater for approximately 4,047 residents. The plant discharges into the Potomac River watershed, ultimately draining to the Chesapeake Bay.
Eastern Correctional Institution WWTP serves 4,100 people in Landon Station, Maryland. The facility is located within 50 km of the coast and operates under U.S. Clean Water Act regulations.
Maryland Correctional Inst MCI serves 1,500 people in Roxbury, Maryland. The plant operates under U.S. Clean Water Act regulations for small-scale correctional facility wastewater treatment.
Snow Hill WWTP serves 2,720 people in Snow Hill, Maryland. The plant operates under US EPA NPDES regulations for municipal wastewater treatment.
Pocomoke City WWTP serves 4,600 people in Cassatt, Maryland. The plant operates under the US Clean Water Act with NPDES permitting for wastewater discharge.
Berlin WWTP serves approximately 4,000 residents in Berlin, Maryland. The plant operates under the U.S. Clean Water Act framework with a designed capacity of 1.00 million gallons per day.
Mystic Harbour WWTP serves approximately 3,000 people in West Ocean City, Maryland. The plant is located within 50 km of the Atlantic coast and discharges into the coastal watershed.
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.