Berwick Area STP - Berwick, Pennsylvania Wastewater Treatment Plant

Berwick Area STP is a wastewater treatment facility located on South Eaton Street in Berwick, Columbia County, Pennsylvania. It serves a population of around 10,774 residents, placing it in the small-to-medium agglomeration category for US municipal plants. The facility is part of the region's wastewater infrastructure, managing sewage from the Berwick area. As a US plant serving fewer than 2 million people, it operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits based on the Clean Water Act. For plants of this scale, secondary treatment is typically required, though specific treatment processes and capacity details are not publicly available in this record. The plant's design and operational status are managed by local authorities. The plant discharges treated wastewater into a local water body that ultimately drains into the Susquehanna River basin, which flows into the Chesapeake Bay. This makes the plant's performance important for downstream water quality, as the Chesapeake Bay is a large estuary with significant ecological and economic value. The facility contributes to protecting local streams and the broader watershed.

The Berwick Area STP discharges into a tributary of the Susquehanna River, which flows south through Pennsylvania and into the Chesapeake Bay. The Chesapeake Bay is the largest estuary in the United States, supporting diverse aquatic life including blue crabs, oysters, and migratory fish. The plant's location in the Susquehanna basin means its effluent quality affects nutrient and pollutant loads entering the bay, which is subject to a multi-state restoration effort under the Chesapeake Bay Total Maximum Daily Load (TMDL).