REDBANK VALLEY JOINT STP - Mahoning Township, Pennsylvania Wastewater Treatment Plant

REDBANK VALLEY JOINT STP is a municipal wastewater treatment facility located in Mahoning Township, Armstrong County, Pennsylvania. The plant serves a population of about 6,475 people, placing it in the small-to-medium agglomeration category under U.S. regulatory frameworks. As a U.S. facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Pennsylvania Department of Environmental Protection. The plant's treated effluent enters local streams that drain into the Allegheny River, a major tributary of the Ohio River system. The Allegheny River supports diverse aquatic life and provides drinking water for downstream communities. Proper treatment at this plant helps protect water quality in this ecologically significant watershed.

The plant discharges into tributaries of the Allegheny River, which flows southwest to join the Ohio River at Pittsburgh. The Allegheny River watershed supports a variety of fish species, including smallmouth bass and walleye, and provides habitat for freshwater mussels. Downstream, the Ohio River eventually drains into the Mississippi River and the Gulf of Mexico, making nutrient and pollutant control at this plant important for regional water quality.