Long Hill Township CS_Septics_STP Wastewater Treatment Plant, Stirling, New Jersey

Long Hill Township CS_Septics_STP is a municipal wastewater treatment facility located in Stirling, New Jersey, within Morris County. It serves a population of about 8,730 people, placing it in the small-to-medium agglomeration category. The plant is situated inland, away from coastal areas, and its operations are subject to state and federal environmental regulations. The plant is expected to meet secondary treatment standards as required by the U.S. Clean Water Act for facilities of this scale. The designed capacity is reported as 1.00 million gallons per day, indicating a modest infrastructure footprint. Regulatory oversight is provided by the New Jersey Department of Environmental Protection under the National Pollutant Discharge Elimination System (NPDES) permit program. The plant discharges treated effluent into local waterways that ultimately drain into the Passaic River basin, which flows into Newark Bay and the Atlantic Ocean. This watershed supports diverse aquatic life and provides recreational and ecological value. The facility plays a key role in protecting water quality in the region by reducing pollutant loads before discharge.

The plant's treated effluent enters the Passaic River watershed, which flows through northern New Jersey before reaching Newark Bay and the Atlantic Ocean. This basin supports a variety of fish species and provides critical habitat for migratory birds. The area is ecologically sensitive due to urban runoff and industrial legacy, making effective wastewater treatment essential for maintaining downstream water quality and ecosystem health.