Winchester STP | Wastewater Treatment Plant in Winchester, Tennessee

Winchester STP is a municipal wastewater treatment facility located in Winchester, Franklin County, Tennessee. It serves a population of about 12,393, placing it in the small-to-medium agglomeration category for U.S. inland plants. Under the U.S. Clean Water Act, plants of this scale are typically required to meet secondary treatment standards through the National Pollutant Discharge Elimination System (NPDES) permitting program. The Tennessee Department of Environment and Conservation administers permits that set effluent limits to protect water quality. The plant discharges into a receiving water body within the Tennessee River basin, which ultimately flows into the Ohio River and then the Mississippi River. The downstream environment supports diverse aquatic life and provides water for municipal, industrial, and recreational uses.

Winchester STP discharges into a tributary of the Tennessee River, which flows into the Ohio River and then the Mississippi River before reaching the Gulf of Mexico. The Tennessee River basin supports diverse aquatic ecosystems, including fish species such as bass and catfish, and provides habitat for freshwater mussels. The plant's discharge must comply with state water quality standards to protect these downstream resources.