Fort Mill WWTP | Wastewater Treatment Plant in Fort Mill, South Carolina

Fort Mill WWTP is a municipal wastewater treatment facility located in Fort Mill, York County, South Carolina, serving a population of around 14,120. The plant is part of the region's infrastructure managed under the U.S. Clean Water Act. As a medium-sized agglomeration, the plant is expected to meet secondary treatment standards under the National Pollutant Discharge Elimination System (NPDES) permit program. The plant discharges into the Catawba River watershed, which flows through the Piedmont region into Lake Wateree and ultimately to the Atlantic Ocean via the Santee River system. The receiving waters support diverse aquatic life and are used for recreation and drinking water supply downstream.

The plant discharges into the Catawba River basin, a major watershed in the southeastern United States. The Catawba River flows into Lake Wateree, then joins the Congaree and Santee Rivers before reaching the Atlantic Ocean. This basin supports diverse fish populations and provides habitat for migratory birds. Downstream waters are used for municipal supply and recreation, making nutrient and pathogen control important for ecological health.