Easton Area STP - Williams Township, Pennsylvania Wastewater Treatment Plant

Easton Area STP is a municipal wastewater treatment facility located in Williams Township, Northampton County, Pennsylvania, serving a population of approximately 118,292. The plant is situated along the Delaware River, which forms the border between Pennsylvania and New Jersey, and is part of the region's critical water infrastructure. As a large agglomeration serving over 100,000 people, the plant is subject to stringent regulatory requirements under the US Clean Water Act, administered through the National Pollutant Discharge Elimination System (NPDES) permit program. Facilities of this scale are typically required to provide at least secondary treatment, with additional nutrient removal standards in sensitive watersheds like the Delaware River Basin. The plant's treated effluent discharges into the Delaware River, which flows southward through the Delaware Water Gap and eventually into the Delaware Bay and the Atlantic Ocean. The Delaware River is a vital water source for millions and supports diverse aquatic life, including migratory fish species such as American shad and striped bass.

The Easton Area STP discharges into the Delaware River, a major waterway that drains into the Delaware Bay and ultimately the Atlantic Ocean. The Delaware River Basin is ecologically significant, supporting a variety of fish, birds, and other wildlife. The plant's operations are subject to regulations aimed at protecting water quality in this important watershed, which provides drinking water for over 15 million people.