New Providence Borough CS_STP Wastewater Treatment Plant, New Providence, New Jersey

New Providence Borough CS_STP is a municipal wastewater treatment plant located in New Providence, Union County, New Jersey. It serves a population of about 13,372 people in this suburban community within the New York metropolitan area. The plant is situated inland, more than 50 kilometers from the Atlantic coast. The plant has a designed capacity of 1.00 million gallons per day. As a facility in the United States, it operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which is part of the Clean Water Act. For a plant serving a population of this size, secondary treatment is typically required, with possible additional nutrient removal depending on the receiving water body's sensitivity. The treated effluent is discharged into local waterways that are part of the Passaic River watershed. The Passaic River flows through northern New Jersey and eventually empties into Newark Bay, which connects to the Atlantic Ocean. The plant plays a key role in protecting the water quality of the Passaic River and downstream ecosystems, including the Newark Bay estuary.

The plant discharges into the Passaic River basin, which drains into Newark Bay and ultimately the Atlantic Ocean. The Passaic River supports diverse aquatic life and is an important migratory corridor for fish species. The downstream Newark Bay estuary provides critical habitat for birds and marine organisms, making nutrient and pollutant control essential for ecological health.