South Versailles Twp STP - Coulter, Pennsylvania Wastewater Treatment Plant

South Versailles Twp STP is a municipal wastewater treatment plant located at 199 Hagendon Street in Coulter, Pennsylvania, within South Versailles Township. The plant serves a population of 660 and is part of the region's wastewater infrastructure managed under the US Clean Water Act. The plant provides secondary treatment, which is the standard level required by the US EPA for municipal facilities of this scale. It has a designed capacity of 416.39 thousand cubic meters per year and reports an annual discharge volume of 302.83 thousand cubic meters. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids before discharge. The treated effluent is discharged into local waterways that ultimately drain into the Monongahela River, a major tributary of the Ohio River. The plant's operations help protect downstream water quality in the Monongahela and Ohio River basins, supporting aquatic life and recreational uses.

The plant discharges into local streams that flow into the Monongahela River, which joins the Ohio River near Pittsburgh. The Ohio River is a major tributary of the Mississippi River, draining into the Gulf of Mexico. The watershed supports diverse aquatic species and is an important corridor for migratory fish. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream ecosystems.