GREENSBORO STP Wastewater Treatment Plant, Monongahela Township, Pennsylvania

GREENSBORO STP is a municipal wastewater treatment plant located in Monongahela Township, Greene County, Pennsylvania. It serves a small community of about 1,440 people, typical of rural facilities in the region. The plant is situated near the Monongahela River, a major tributary of the Ohio River. As a small-scale facility in the United States, GREENSBORO STP operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. For plants serving fewer than 10,000 people, secondary treatment is typically mandated to reduce biochemical oxygen demand and suspended solids. The plant's treatment process and capacity are consistent with standard practices for its size. The treated effluent from GREENSBORO STP is discharged into the Monongahela River, which flows north to Pittsburgh before joining the Ohio River. The Ohio River then drains into the Mississippi River and ultimately reaches the Gulf of Mexico. The Monongahela River supports diverse aquatic life and is used for recreation and drinking water downstream.

GREENSBORO STP discharges into the Monongahela River, a major tributary of the Ohio River. The Monongahela River flows through southwestern Pennsylvania and supports a variety of fish species, including smallmouth bass and walleye. Downstream, the Ohio River and Mississippi River system carry treated effluent to the Gulf of Mexico, where nutrient loading can contribute to hypoxic zones. The plant's location inland and small population served reduce its direct impact on coastal ecosystems.