Vienna WWTP - Secondary Wastewater Treatment Plant in Vienna, Maryland

Vienna WWTP is a municipal wastewater treatment plant located in Vienna, Dorchester County, Maryland, United States. It serves a small population of 548 residents and operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal facilities. The plant's designed capacity is 518.60 million gallons, with an annual discharge volume of 147.63 million gallons. The plant provides secondary treatment, which is the standard level for small communities in the US. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant is likely permitted under the National Pollutant Discharge Elimination System (NPDES) administered by the Maryland Department of the Environment, ensuring compliance with water quality standards. The treated effluent is discharged into local waterways that drain into the Chesapeake Bay watershed. The Chesapeake Bay is the largest estuary in the United States and supports diverse aquatic life, including blue crabs, oysters, and migratory fish. The plant's discharge contributes to the nutrient and pollutant load in the bay, making its treatment performance important for regional water quality.

The plant discharges into the Chesapeake Bay watershed, which ultimately drains into the Atlantic Ocean. The Chesapeake Bay is an ecologically sensitive estuary that supports diverse aquatic life, including blue crabs, oysters, and striped bass. Nutrient pollution from wastewater can contribute to algal blooms and hypoxia, so the plant's secondary treatment helps mitigate these impacts.