Suffolk Co SCSD20EWFloyd WWTP - Ridge, New York Wastewater Treatment Plant

Suffolk Co SCSD20EWFloyd WWTP is a municipal wastewater treatment facility located in Ridge, Suffolk County, New York. The plant serves a population of approximately 2,050 residents and is situated near the William Floyd Parkway, within the Town of Brookhaven. As a secondary treatment plant, it provides biological treatment to remove organic matter and suspended solids from wastewater before discharge. The plant has a designed capacity of 1,040.99 cubic meters per day and currently treats an average daily flow of 757.08 cubic meters. It operates under the regulatory framework of the US Clean Water Act, with discharge permits issued by the New York State Department of Environmental Conservation (NYSDEC) under the National Pollutant Discharge Elimination System (NPDES). Secondary treatment is the minimum standard for municipal plants in the US, ensuring protection of water quality in receiving waters. The treated effluent is discharged into local waterways that drain into the Long Island Sound, an ecologically significant estuary supporting diverse marine life, including shellfish, finfish, and migratory birds. The plant's proximity to the coast (within 10 km) underscores the importance of effective nutrient removal to prevent eutrophication and protect the sound's sensitive ecosystem.

The plant discharges into tributaries of the Long Island Sound, a major estuary that connects to the Atlantic Ocean. The sound supports critical habitats for species such as striped bass, bluefish, and winter flounder, and serves as a migratory corridor for waterfowl. Effective wastewater treatment is essential to minimize nutrient loading and protect water quality in this ecologically sensitive coastal environment.