Suffolk County Sewer District 1 Port Jefferson STP - New York Wastewater Treatment Plant

Suffolk County Sewer District 1 Port Jefferson STP is a municipal wastewater treatment plant located on Beach Street in the Village of Port Jefferson, Suffolk County, New York. The facility serves a population of approximately 7,400 residents and is part of the region's wastewater infrastructure managed by Suffolk County. As a plant serving a medium-sized community in New York, it operates under the U.S. Clean Water Act, which requires secondary treatment for municipal discharges. The plant has a designed capacity of 1.00 million gallons per day, reflecting its role in managing local wastewater flows. Treatment processes and operational status are consistent with standard practices for facilities of this scale. The plant's treated effluent is discharged into Long Island Sound, a major estuary that supports diverse marine life and recreational activities. The sound connects to the Atlantic Ocean, making the plant's discharge important for local water quality and downstream ecological health.

The plant discharges into Long Island Sound, a large estuary bordered by New York and Connecticut that ultimately drains into the Atlantic Ocean. The sound supports critical habitats for fish, shellfish, and migratory birds. Protecting water quality in this watershed is essential for maintaining the ecological balance and recreational value of the region.