Neversink T Grahamsville STP NYCDEP - Advanced Wastewater Treatment in Town of Neversink, New York

The Neversink T Grahamsville STP NYCDEP is a municipal wastewater treatment facility located in the Town of Neversink, Sullivan County, New York. Serving a small population of 600, the plant is part of the New York City Department of Environmental Protection's watershed protection program, which manages water quality in the Catskill/Delaware supply system. The plant provides advanced treatment, exceeding the secondary treatment standards required by the US Clean Water Act. With a designed capacity of 681.37 million gallons per year and an actual discharge volume of 155.20 million gallons per year, the facility operates well below its capacity, indicating room for future growth or seasonal variability. As a US plant, it operates under an EPA NPDES permit issued by the New York State Department of Environmental Conservation. The treated effluent is discharged into a tributary of the Neversink River, which flows into the Delaware River and ultimately into Delaware Bay. The plant's advanced treatment helps protect the sensitive Catskill Mountain watershed, which supplies drinking water to New York City and supports diverse aquatic life, including wild trout populations.

The plant discharges into the Neversink River watershed, a tributary of the Delaware River that flows into Delaware Bay. This region is part of the Catskill Mountain ecosystem, known for its forested headwaters and cold-water fisheries. The advanced treatment ensures minimal nutrient loading, protecting downstream water quality and aquatic habitats, including spawning grounds for migratory fish.