Oswego C East Side STP - City of Oswego, New York Wastewater Treatment Plant

Oswego C East Side STP is a municipal wastewater treatment plant located in the City of Oswego, New York, along the southeastern shore of Lake Ontario. The facility serves a population of approximately 10,000 residents, making it a medium-sized treatment plant within the region. Its location in Oswego County places it within the Lake Ontario watershed, a major freshwater ecosystem. As a US-based facility, the plant operates under the Clean Water Act, administered by the New York State Department of Environmental Conservation through the State Pollutant Discharge Elimination System (SPDES). For a plant serving 10,000 people, secondary treatment is the minimum required standard, though many facilities of this scale incorporate additional nutrient removal to protect sensitive water bodies. The designed capacity of 1.00 million gallons per day provides a baseline for its operational scale. The plant discharges treated effluent into the Lake Ontario basin, which ultimately drains into the St. Lawrence River and the Atlantic Ocean. Lake Ontario supports diverse aquatic life, including coldwater fisheries, and is a critical drinking water source for millions. The plant's performance is essential for maintaining water quality in this ecologically and economically significant Great Lake.

Oswego C East Side STP discharges into the Lake Ontario watershed, part of the Great Lakes system that drains via the St. Lawrence River to the Atlantic Ocean. Lake Ontario supports diverse aquatic life, including native fish species such as lake trout and walleye, and provides drinking water for millions. The plant's location within 50 km of the coast underscores its role in protecting nearshore water quality from nutrient and pathogen inputs.