171 plants indexed.
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.
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.
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.
Middletown WWTP in Valley Overlook, Maryland, serves 1,197 people with advanced treatment. The plant discharges 548.89 thousand cubic meters annually, operating under US EPA NPDES regulations.
White Rock WWTP in Mountaindale, Maryland, serves 265 people with advanced treatment. The plant discharges 140.06 volume units daily and has a designed capacity of 189.27 units.
FOUNTAINDALE WWTP is a secondary treatment plant serving approximately 3,000 people in Middletown, Maryland, United States. It discharges treated wastewater into local waterways under EPA NPDES regulations.
Jefferson WWTP in Burgee, Maryland, serves 2,209 people with advanced treatment. The plant discharges 423.97 million gallons per year into local waterways, supporting the Potomac River watershed.
Point of Rocks STP is an advanced wastewater treatment plant serving 1,103 people in Point of Rocks, Maryland. It discharges treated effluent into the Potomac River watershed.
Clifton on the Potomac WWTP is an advanced treatment plant serving 800 people in Rock Point, Maryland. It discharges treated wastewater near the Potomac River estuary, operating under US EPA NPDES regulations.
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.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, GRANTSVILLE WWTP has the highest designed capacity at 2,271 m3/day.