West Goshen STP - West Chester, Pennsylvania Wastewater Treatment Plant

West Goshen STP is a municipal wastewater treatment facility located in West Chester, Pennsylvania, serving a population of about 31,450. The plant is situated in Chester County and is part of the region's wastewater infrastructure. Under the US Clean Water Act, plants of this scale are typically required to meet secondary treatment standards through National Pollutant Discharge Elimination System (NPDES) permits issued by the Pennsylvania Department of Environmental Protection. The plant's designed capacity is 1.00 million gallons per day, indicating it is sized for a medium-sized community. The treated effluent from West Goshen STP is discharged into local waterways that ultimately flow into the Delaware River Basin. The Delaware River supports diverse aquatic life and provides drinking water for millions of people in the northeastern United States. The plant's location inland reduces direct marine impact, but its discharge contributes to the overall water quality of the watershed.

The plant discharges into tributaries of the Brandywine Creek, which flows into the Christina River and then into the Delaware River estuary. The Delaware River Basin is a critical water resource supporting migratory fish species such as American shad and Atlantic sturgeon. The watershed is also an important drinking water source for Philadelphia and surrounding communities.