PEARISBURG STP - Secondary Wastewater Treatment Plant in Pearisburg, Virginia

PEARISBURG STP is a municipal wastewater treatment plant located in Pearisburg, Giles County, Virginia. It serves a population of approximately 2,729 residents, classifying it as a small-scale facility under the US Clean Water Act regulatory framework. The plant provides secondary treatment, which is the minimum standard for municipal wastewater treatment in the United States under the National Pollutant Discharge Elimination System (NPDES). Its designed capacity is 1,040.99 million gallons per day, with an average discharge volume of 719.23 million gallons per day, indicating operational headroom. The treated effluent is discharged into receiving waters that flow into the New River, a tributary of the Kanawha River and ultimately the Ohio River. The plant plays a role in protecting downstream water quality in this Appalachian watershed, which supports diverse aquatic life and recreational uses.

The plant discharges into the New River watershed, which flows through Virginia and West Virginia before joining the Kanawha River. This region is part of the Ohio River basin, ultimately draining into the Mississippi River. The New River supports a variety of fish species and is used for recreation, making proper treatment essential to prevent nutrient pollution and protect aquatic habitats.