Westbrook WWTF - Municipal Wastewater Treatment in Westbrook, Maine

Westbrook WWTF is a municipal wastewater treatment facility located in Westbrook, Maine, serving a population of about 25,203. The plant is situated in Cumberland County, near the Presumpscot River, and is part of the regional wastewater infrastructure for the greater Portland area. As a facility in the United States, Westbrook WWTF operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Maine Department of Environmental Protection. For a population of this size, secondary treatment is typically required, and the plant's designed capacity is 1.00 million gallons per day, indicating it is sized for the community's needs. The plant's treated effluent is discharged into the Presumpscot River, which flows approximately 25 miles to Casco Bay, an estuary in the Gulf of Maine. The river supports diverse aquatic life, including migratory fish species, and the bay is an ecologically important coastal habitat. The plant's operations help protect water quality in this sensitive watershed.

The Presumpscot River watershed drains into Casco Bay, a large estuary on the Gulf of Maine. This coastal ecosystem supports diverse marine life, including fish, shellfish, and seabirds, and is an important area for commercial and recreational fishing. The river itself provides habitat for migratory fish such as alewife and Atlantic salmon. Protecting water quality in this watershed is critical for maintaining the ecological health of the bay and the broader Gulf of Maine.