Purcellville STP - Advanced Wastewater Treatment in Purcellville, Virginia

Purcellville STP is an advanced wastewater treatment facility located in Purcellville, Loudoun County, Virginia. The plant serves a population of approximately 2,546 residents, treating municipal wastewater from the historic downtown area and surrounding communities. As a smaller-scale facility, it plays a key role in managing local wastewater within the broader regional infrastructure. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 1,892.70 million gallons per day and an actual discharge volume of 832.79 million gallons per day, the facility operates well within its capacity. Under the U.S. Clean Water Act, such plants are regulated through National Pollutant Discharge Elimination System (NPDES) permits issued by the Virginia Department of Environmental Quality, ensuring compliance with water quality standards. The treated effluent is discharged into local streams that flow into the Potomac River, a major waterway that drains into the Chesapeake Bay. The Chesapeake Bay is a large estuary of ecological significance, supporting diverse aquatic life and migratory species. Advanced treatment at this plant helps reduce nutrient loading, which is critical for protecting the bay's health and preventing algal blooms.

The plant discharges into the Potomac River watershed, which ultimately drains into the Chesapeake Bay. The Chesapeake Bay is a vital estuary that supports a rich ecosystem, including blue crabs, oysters, and migratory fish. Advanced treatment at this facility helps minimize nutrient pollution, which is a key concern for the bay's water quality and aquatic habitats.