MOONEY Wastewater Treatment Plant, Prince William County, Virginia

MOONEY is a wastewater treatment plant located in Prince William County, Virginia, United States. It serves a population of approximately 100,400 people and has a designed capacity of 1.00 million gallons per day. The plant is situated near the Potomac River watershed and operates under the regulatory framework of the US Clean Water Act, which requires NPDES permits for discharges to surface waters. As a facility serving a medium-to-large agglomeration, MOONEY is expected to meet secondary treatment standards under the Clean Water Act. Typical plants of this scale in Virginia employ activated sludge or similar biological treatment to meet permit limits for biochemical oxygen demand and total suspended solids. The plant discharges treated effluent into the Potomac River basin, which flows into the Chesapeake Bay. This estuary is ecologically sensitive, supporting diverse aquatic life and serving as a critical habitat for migratory fish and shellfish. The plant's operations contribute to the protection of downstream water quality in the Chesapeake Bay watershed.

MOONEY plant discharges into the Potomac River, which flows into the Chesapeake Bay, the largest estuary in the United States. The Chesapeake Bay supports a complex ecosystem including blue crabs, oysters, and striped bass, and is a vital migratory corridor for waterfowl. Nutrient and sediment loads from wastewater plants in the watershed are managed under the Chesapeake Bay Total Maximum Daily Load (TMDL) program to reduce eutrophication and improve water quality.