Limerick Twp Possum Hollow STP - East Coventry Township, Pennsylvania Wastewater Treatment

Limerick Twp Possum Hollow STP is a municipal wastewater treatment facility located in East Coventry Township, Chester County, Pennsylvania. The plant serves a population of about 5,000 people, placing it in the small-to-medium agglomeration category for US wastewater infrastructure. As a US-based plant, it 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. For facilities of this scale, secondary treatment is the standard requirement, ensuring removal of organic matter and suspended solids before discharge. The plant's treated effluent is discharged into local waterways within the Delaware River Basin, which ultimately drains into the Delaware Bay and the Atlantic Ocean. The surrounding region includes mixed urban and agricultural land uses, and the plant plays a key role in protecting downstream water quality and aquatic habitats.

The plant discharges into tributaries of the Schuylkill River, a major tributary of the Delaware River. The Delaware River Basin supports diverse aquatic life, including migratory fish species such as American shad and Atlantic sturgeon. The plant's operations help maintain water quality standards in this ecologically significant watershed, which flows into the Delaware Bay and Atlantic Ocean.