Vienna WWTP - Secondary Wastewater Treatment in Vienna, Missouri

Vienna WWTP is a municipal wastewater treatment facility located in Vienna, Missouri, United States. The plant serves a small population of 610 residents, providing essential sanitation services for the community. As a secondary treatment plant, it meets the standard requirements for organic matter and suspended solids removal under the US Clean Water Act. The plant has a designed capacity of 514.81 volume units and a current discharge volume of 340.69, indicating operational headroom. As a US facility, it operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits and monitoring requirements to protect water quality. Secondary treatment is the minimum level required for municipal plants under the Clean Water Act. The treated effluent from Vienna WWTP is discharged into local streams that drain into the Missouri River watershed, ultimately reaching the Mississippi River and the Gulf of Mexico. The plant plays a key role in preventing nutrient pollution and protecting downstream aquatic ecosystems in this agriculturally important region.

The plant discharges into tributaries of the Missouri River, which flows into the Mississippi River and then to the Gulf of Mexico. This watershed supports diverse aquatic life and is part of a large agricultural region where nutrient management is critical to prevent hypoxia in the Gulf. The plant's secondary treatment helps reduce organic and nutrient loads, contributing to downstream water quality.