Mid Mon Valley STP - Allenport, Pennsylvania Wastewater Treatment Plant

Mid Mon Valley STP is a municipal wastewater treatment plant located in Allenport, Washington County, Pennsylvania. Serving a population of approximately 2,300, the facility is part of the region's infrastructure for managing domestic wastewater. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for discharges into surface waters. As a small-scale treatment facility, Mid Mon Valley STP is expected to meet secondary treatment standards as defined by the EPA, which typically involve biological processes to reduce organic matter and suspended solids. The plant's design and operation align with state and federal guidelines to protect public health and the environment. The treated effluent from the plant is discharged into a tributary of the Monongahela River, which flows northward to join the Ohio River at Pittsburgh. The Monongahela River supports diverse aquatic life and is used for recreation and drinking water supply downstream. The plant's operation helps maintain water quality in this important regional watershed.

The plant discharges into the Monongahela River watershed, which drains into the Ohio River and ultimately the Mississippi River system. The Monongahela River supports a variety of fish species and is a key water resource for communities in southwestern Pennsylvania. The plant's treatment processes help reduce nutrient and pollutant loads, protecting downstream aquatic habitats and drinking water sources.