Johnstown City STP - Major Wastewater Treatment Plant in West Taylor Township, Pennsylvania

Johnstown City STP is a major wastewater treatment facility located in West Taylor Township, Cambria County, Pennsylvania. Serving a population of approximately 117,000, it is classified as a large agglomeration under US regulatory standards. The plant is part of the municipal infrastructure for the Johnstown area, treating wastewater from residential, commercial, and industrial sources. As a US facility, Johnstown City STP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Pennsylvania Department of Environmental Protection. For a plant of this scale, secondary treatment is typically required, which involves biological processes to remove organic matter and suspended solids. The plant's design capacity and treatment process details are not publicly available, but it meets the regulatory standards for its population tier. The treated effluent from Johnstown City STP is discharged into the Conemaugh River, a tributary of the Kiskiminetas River, which flows into the Allegheny River and ultimately the Ohio River. This watershed supports diverse aquatic life and is important for regional water quality. The plant plays a key role in protecting the downstream environment by reducing pollutant loads before discharge.

Johnstown City STP discharges into the Conemaugh River, which flows into the Kiskiminetas River, then the Allegheny River, and finally the Ohio River. This watershed supports diverse aquatic species and is used for recreation and drinking water downstream. The plant's effluent must meet water quality standards to protect the ecological health of the river system, which is sensitive to nutrient pollution and sediment loading.