URBANNA STP Wastewater Treatment Plant, Middlesex County, Virginia

URBANNA STP is a municipal wastewater treatment plant located in Middlesex County, Virginia, United States. The plant serves a small population of 702 residents and operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment as a minimum standard for municipal wastewater facilities. The plant provides secondary treatment, a biological process that removes organic matter and suspended solids. Its designed capacity is 189.27 megaliters per year, with an actual discharge volume of 151.42 megaliters per year, indicating it operates below capacity. As a coastal facility within 10 km of the Atlantic Ocean, the plant's discharge is subject to additional environmental scrutiny to protect sensitive marine ecosystems. The treated effluent from URBANNA STP is discharged into local waterways that ultimately drain into the Chesapeake Bay, the largest estuary in the United States. The Chesapeake Bay watershed supports diverse aquatic life and is a critical habitat for fish, crabs, and migratory birds. The plant's performance is important for maintaining water quality in this ecologically significant region.

URBANNA STP discharges into the Chesapeake Bay watershed, a vast estuary system that drains into the Atlantic Ocean. The bay supports diverse aquatic life, including blue crabs, oysters, and striped bass, and is a critical migratory corridor for waterfowl. As a coastal plant, its nutrient and pollutant loads are closely monitored to prevent eutrophication and hypoxia in the bay.