Northumberland Boro STP - Municipal Wastewater Treatment in Northumberland, Pennsylvania

Northumberland Boro STP is a municipal wastewater treatment facility located in Northumberland, Pennsylvania, serving a population of approximately 4,064 residents. The plant is situated along the Susquehanna River, which flows through the region and ultimately drains into the Chesapeake Bay. As a US facility, the plant 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 a plant serving this population size, secondary treatment is the standard requirement, with possible additional nutrient controls due to the Chesapeake Bay watershed's sensitivity to nitrogen and phosphorus. The plant's treated effluent is discharged into the Susquehanna River, which flows south through Pennsylvania and Maryland before entering the Chesapeake Bay. The Chesapeake Bay is the largest estuary in the United States and supports diverse aquatic life, including blue crabs, oysters, and migratory fish. Nutrient pollution from wastewater plants in the basin is a key concern for bay health.

The plant discharges into the Susquehanna River, which flows approximately 444 miles through Pennsylvania and Maryland to the Chesapeake Bay. The Chesapeake Bay watershed is ecologically sensitive, supporting critical habitats for fish, shellfish, and waterfowl. Nutrient loading from wastewater treatment plants in the basin contributes to algal blooms and hypoxia, making advanced nutrient removal an important consideration for facilities in this region.