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.
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.
Sharptown WWTP is an advanced treatment facility serving 670 residents in Sharptown, Maryland. It discharges 427.75 million gallons per year into local waterways.
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.
Willards WWTP is an advanced treatment facility serving 940 people in Willards, Maryland. It discharges 302.83 units of treated wastewater, operating under U.S. Clean Water Act regulations.
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.
Hancock STP is an advanced wastewater treatment plant serving 1,700 people in Hancock, Maryland. It discharges treated water into the Potomac River watershed, contributing to Chesapeake Bay water quality.
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.
Clear Spring WWTP is an advanced treatment plant serving 570 people in Washington County, Maryland. It discharges 268.76 units of treated wastewater daily, with a designed capacity of 1135.62 units.
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.
Winebrenner WWTP is an advanced treatment facility in Highfield Cascade, Maryland, serving 3,157 people. It discharges 522.39 volume units daily with a designed capacity of 3,785.40 units.
St Clement s Shores WWTP is an advanced treatment plant in Compton, Maryland, serving 706 people. It discharges 321.76 units of treated wastewater near the Chesapeake Bay.
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.
Grantsville WWTP is a secondary treatment plant serving 1,175 people in Grantsville, Maryland. It discharges treated wastewater into the Casselman River watershed, part of the Youghiogheny River basin.
Friendsville WWTP is a secondary treatment plant serving 550 residents in Friendsville, Maryland. It discharges treated wastewater into the local watershed, with a designed capacity of 378.54 cubic meters per day.
GORMAN WWTP is a secondary treatment plant in Steyer, Maryland, serving 430 people. It discharges 18.93 million gallons per day and has a designed capacity of 34.07 million gallons per day.
CRELLIN WWTP is a secondary treatment plant serving 175 people in Crellin, Maryland. It discharges 53.00 million gallons per day and has a designed capacity of 102.21 million gallons per day.
Kitzmiller WWTS is a secondary treatment plant serving 250 people in Kitzmiller, Maryland. It discharges treated wastewater into local waterways, operating under US EPA and Maryland Department of the Environment regulations.
Middletown East WWTP is an advanced treatment facility serving approximately 1,200 residents in Middletown, Maryland. It discharges 666.23 thousand cubic meters of treated wastewater annually.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, Winebrenner WWTP has the highest designed capacity at 3,785 m3/day.