Oil City STP - Wastewater Treatment Plant in Oil City, Pennsylvania

Oil City STP is a municipal wastewater treatment facility located in Oil City, Venango County, Pennsylvania. It serves a population of around 14,634, classifying it as a medium-sized agglomeration under US EPA guidelines. The plant is situated on the Venango Campus of Clarion University, along West 1st Street. As a US facility, Oil City STP operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. Its population served suggests a moderate throughput. The plant discharges treated wastewater into the Allegheny River, which flows southwest to join the Ohio River at Pittsburgh. The Ohio River then drains into the Mississippi River and ultimately to the Gulf of Mexico. The Allegheny River supports diverse aquatic life and is a key water resource for the region, making proper treatment essential for downstream ecosystems.

Oil City STP discharges into the Allegheny River, a major tributary of the Ohio River. The Allegheny River flows through forested and industrial areas, supporting fish species such as smallmouth bass and walleye. Downstream, the Ohio River provides drinking water and habitat, with the Mississippi River carrying waters to the Gulf of Mexico. The plant's location in a temperate climate with seasonal variations requires robust treatment to handle wet weather flows and protect aquatic life.