Cassville STP - Secondary Wastewater Treatment in Cass Township, Pennsylvania

Cassville STP is a municipal wastewater treatment plant located in Cass Township, Huntingdon County, Pennsylvania. Serving a small population of 152 residents, the facility provides secondary treatment to meet state and federal water quality standards. The plant's designed capacity matches its current discharge volume of 75.71 units, indicating consistent operation within its design parameters. As a secondary treatment plant, Cassville STP utilizes biological processes to reduce organic matter and suspended solids before discharge. Under the US Clean Water Act, such facilities must comply with National Pollutant Discharge Elimination System (NPDES) permits issued by the Pennsylvania Department of Environmental Protection. These permits set effluent limits to protect receiving water bodies. The treated wastewater from Cassville STP is discharged into local waterways that ultimately drain into the Susquehanna River basin. The Susquehanna River flows through Pennsylvania and Maryland before emptying into the Chesapeake Bay, a major estuary supporting diverse aquatic life and important for regional ecology.

The plant's discharge enters small streams in the Juniata River watershed, a tributary of the Susquehanna River. The Susquehanna flows into the Chesapeake Bay, the largest estuary in the United States. This watershed supports diverse fish populations and migratory birds, making nutrient and pollutant control critical for downstream ecosystem health.