Montgomery Co SD1 STP | Wastewater Treatment Plant in Nelliston, New York

Montgomery Co SD1 STP is a municipal wastewater treatment plant located on Old Station Road in the Village of Nelliston, Montgomery County, New York. Serving a population of about 3,626, the plant is part of the region's infrastructure for managing domestic wastewater in the Mohawk Valley area. As a US-based facility, the plant operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the New York State Department of Environmental Conservation. For a plant of this scale, secondary treatment is typically required, and discharge limits are set to protect receiving waters. The plant's treated effluent likely discharges into a tributary of the Mohawk River, which flows into the Hudson River and eventually the Atlantic Ocean. The Mohawk River watershed supports diverse aquatic life and is an important ecological corridor in upstate New York.

The plant's discharge enters the Mohawk River watershed, a major tributary of the Hudson River. The Hudson River estuary is a critical habitat for migratory fish such as American shad and Atlantic sturgeon. Downstream, the Hudson flows into New York Harbor and the Atlantic Ocean, making nutrient and pollutant control important for coastal water quality.