Norwich C STP - Wastewater Treatment Plant, City of Norwich, New York

Norwich C STP is a municipal wastewater treatment facility located in the City of Norwich, Chenango County, New York. The plant serves a population of about 7,585 residents, placing it in the small-to-medium agglomeration category for US regulatory purposes. As a US facility, Norwich C STP operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the New York State Department of Environmental Conservation. The Clean Water Act requires secondary treatment as a baseline for municipal plants, with additional nutrient removal standards for facilities discharging to sensitive watersheds. The plant discharges treated effluent into the Chenango River, a tributary of the Susquehanna River, which flows into the Chesapeake Bay. This places the plant within the Chesapeake Bay watershed, where nutrient reduction targets are a key regulatory driver for wastewater treatment plants.

The Chenango River flows south to join the Susquehanna River, which ultimately drains into the Chesapeake Bay, the largest estuary in the United States. The Chesapeake Bay watershed is ecologically sensitive, supporting diverse aquatic life and important fisheries. Nutrient loading from wastewater plants in the basin is a concern, as excess nitrogen and phosphorus can contribute to algal blooms and hypoxia in the Bay.