Pigeon Creek STP - Wastewater Treatment Plant in Bentleyville, Pennsylvania

Pigeon Creek STP is a wastewater treatment facility located in Bentleyville, Pennsylvania, within Washington County. It serves a population of about 7,956 people, making it a small-to-medium agglomeration under U.S. regulatory frameworks. The plant is operated by the Pigeon Creek Sanitary Authority and treats wastewater from the local community. As a U.S. facility, Pigeon Creek STP operates under the Clean Water Act, administered by the Pennsylvania Department of Environmental Protection (PA DEP) through the National Pollutant Discharge Elimination System (NPDES) permit program. For plants serving populations around 8,000, secondary treatment is typically required to meet effluent limits for biochemical oxygen demand and total suspended solids. The treated effluent from Pigeon Creek STP is discharged into Pigeon Creek, a tributary of the Monongahela River. The Monongahela River flows northward to join the Allegheny River at Pittsburgh, forming the Ohio River, which ultimately drains into the Mississippi River and the Gulf of Mexico. This watershed supports diverse aquatic life and provides drinking water for downstream communities.

Pigeon Creek STP discharges into Pigeon Creek, which flows into the Monongahela River, a major tributary of the Ohio River. The Ohio River drains into the Mississippi River and eventually the Gulf of Mexico. This watershed is ecologically significant, supporting fish species such as smallmouth bass and channel catfish, and providing habitat for freshwater mussels. The plant's discharge must meet water quality standards to protect these downstream ecosystems.