Patchogue V WWTP - Advanced Wastewater Treatment in Village of Patchogue, New York

Patchogue V WWTP is an advanced wastewater treatment plant located at 234 West Main Street in the Village of Patchogue, Suffolk County, New York. The facility serves a population of approximately 1,100 residents and operates as part of the region's municipal wastewater infrastructure. The plant employs advanced treatment processes, which go beyond secondary treatment to remove additional nutrients and contaminants. With a designed capacity of 1,892.70 thousand gallons per day and an average discharge volume of 658.66 thousand gallons per day, the facility operates well below its capacity. As a US plant, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the New York State Department of Environmental Conservation. The treated effluent is discharged into a receiving water body that ultimately drains to the Atlantic Ocean via the Great South Bay or nearby coastal waters. The plant's location within 10 km of the coast means its discharge can influence sensitive estuarine and marine ecosystems, making advanced treatment important for protecting water quality and aquatic life.

The plant discharges into local waterways that flow into the Great South Bay, a shallow estuary along Long Island's south shore, which connects to the Atlantic Ocean. This coastal watershed supports diverse marine life, including shellfish beds and finfish, and is an important migratory corridor for birds. Advanced treatment helps reduce nutrient loading that could otherwise contribute to algal blooms and hypoxia in the bay.