Unity Township 14 Mile STP - Wastewater Treatment in Unity Township, Pennsylvania

Unity Township 14 Mile STP is a municipal wastewater treatment facility located in Unity Township, Westmoreland County, Pennsylvania. The plant serves a population of about 3,930 people in the surrounding community, providing essential wastewater treatment services to this inland area. As a small-scale treatment plant in the United States, the facility is subject to the National Pollutant Discharge Elimination System (NPDES) permit program under the Clean Water Act. This regulatory framework requires permits for discharges into surface waters and sets effluent limits based on the receiving water body's characteristics. For plants of this size, secondary treatment is typically required as a minimum standard. The plant discharges treated wastewater into local waterways within the Ohio River basin. The Ohio River ultimately flows into the Mississippi River and then to the Gulf of Mexico. The facility plays a role in protecting water quality in its local watershed, which supports diverse aquatic life and provides recreational and drinking water resources downstream.

The plant discharges into tributaries of the Ohio River, which flows through Pennsylvania, Ohio, West Virginia, and several other states before joining the Mississippi River. The Ohio River basin supports a variety of fish species and is an important migratory corridor for birds. The watershed faces pressures from agricultural runoff and urban development, making proper wastewater treatment essential for maintaining water quality and ecosystem health.