Colonial Beach STP - Wastewater Treatment Plant in Colonial Beach, Virginia

Colonial Beach STP is a municipal wastewater treatment facility located in Colonial Beach, Virginia, a small town on the Northern Neck peninsula. The plant serves a population of about 4,110 residents, typical of a small coastal community. Its location near the Potomac River places it within the Chesapeake Bay watershed. As a U.S. facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Virginia Department of Environmental Quality. For a plant of this size, secondary treatment is typically required, and discharge limits are set to protect the receiving waters. The designed capacity is 1.00 million gallons per day, indicating a small-scale operation. The plant's treated effluent likely discharges into the Potomac River, which flows into the Chesapeake Bay, the largest estuary in the United States. The Chesapeake Bay is ecologically sensitive, supporting diverse aquatic life including blue crabs, oysters, and striped bass. Nutrient removal is critical in this region to prevent algal blooms and hypoxia in the Bay.

Colonial Beach STP discharges into the Potomac River, which flows approximately 383 miles to the Chesapeake Bay. The Bay is a vital estuary that supports commercial and recreational fisheries, as well as migratory birds. The plant's location within 50 km of the coast means its discharge can influence downstream water quality, particularly nutrient loads that contribute to eutrophication in the Bay.