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.
Greensboro WWTP is an advanced treatment facility in Greensboro, Maryland, serving about 2,000 people. It discharges treated wastewater into local waterways within the Chesapeake Bay watershed.
Rawlings WWTP and Collection System is a secondary treatment plant serving 750 people in Rawlings, Maryland. It discharges 302.83 thousand cubic meters per year into local waterways.
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.
Chesapeake City South STP is a secondary treatment plant serving 400 people in North Chesapeake City, Maryland. It discharges treated wastewater near the Chesapeake Bay, a major estuary on the U.S. East Coast.
Chesapeake City North STP is a secondary treatment plant serving 385 people in North Chesapeake City, Maryland. It discharges treated wastewater near the Chesapeake Bay, a major estuary on the U.S. East Coast.
Cecilton WWTP is a secondary treatment plant in Cecilton, Maryland, serving 475 people. It discharges 227.13 thousand cubic meters of treated wastewater annually, with a designed capacity of 378.54 thousand cubic meters.
Harbor View WWTP is a secondary treatment plant in Cecil County, Maryland, serving 437 people. It discharges 124.92 million gallons per year into local waterways near the Chesapeake Bay.
Cherry Hill WWTP is an advanced treatment plant serving 800 people in Cherry Wood, Maryland. It discharges 571.60 volume units daily, with a designed capacity of 946.35 volume units.
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.
Ocean Pines WWTP in Showell, Maryland serves 13,000 people. The plant is located within 50 km of the Atlantic coast and discharges into local waterways.
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.
UtilityRadar indexes 171 wastewater treatment plants in Maryland, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, Greensboro WWTP has the highest designed capacity at 3,081 m3/day.