CONFLUENCE BORO STP - Advanced Wastewater Treatment in Confluence, Pennsylvania

CONFLUENCE BORO STP is a municipal wastewater treatment facility located in Confluence, Pennsylvania, a small borough in Somerset County. The plant serves a population of approximately 955 residents, reflecting its role in a rural community. As an advanced treatment plant, it provides a higher level of pollutant removal than secondary treatment alone. The plant operates under the US Clean Water Act, which requires NPDES permits for all point source discharges. For small agglomerations like Confluence, advanced treatment is often implemented to protect sensitive receiving waters. The plant has a designed capacity of 492,100 gallons per day and currently treats an average daily flow of 340,690 gallons, indicating operational headroom. The treated effluent is discharged into the Casselman River, a tributary of the Youghiogheny River, which flows into the Monongahela River and ultimately the Mississippi River system. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant's advanced treatment helps maintain water quality in this ecologically important basin.

The plant discharges into the Casselman River, part of the Ohio River basin, which drains into the Mississippi River and the Gulf of Mexico. The Casselman River supports a variety of fish and macroinvertebrate species, and its water quality is important for recreational uses and downstream ecosystems. Advanced treatment at this plant reduces nutrient and pollutant loads, protecting the river's ecological health.