Centralia WWTP - Audrain County, Missouri Wastewater Treatment Plant

Centralia WWTP is a municipal wastewater treatment facility located in Audrain County, Missouri, serving a population of about 3,777 residents. The plant is part of the region's infrastructure for managing domestic wastewater from the community. As a U.S. facility, Centralia WWTP operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. For a plant serving this population size, secondary treatment is typically mandated to meet effluent limits that protect water quality. The treated effluent from Centralia WWTP is discharged into local streams that are part of the Missouri River watershed, which ultimately drains into the Mississippi River and the Gulf of Mexico. This downstream connection highlights the plant's role in maintaining water quality in a major river basin that supports diverse aquatic life and regional ecosystems.

Centralia WWTP discharges into local waterways within the Missouri River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. The receiving waters support aquatic habitats and are part of a larger watershed that provides drinking water, recreation, and ecological services. The plant's operations help protect downstream water quality in this agriculturally and ecologically significant region.