RCSD Kimmswick WWTP - Kimmswick, Missouri Wastewater Treatment Plant

RCSD Kimmswick WWTP is a municipal wastewater treatment facility located in Kimmswick, Missouri, along the Mississippi River. The plant serves a population of about 44,900 residents in the Jefferson County area, operating as part of the region's wastewater infrastructure. As a medium-to-large agglomeration in the United States, the plant is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting requirements. Facilities of this scale typically employ secondary treatment or better to meet effluent limits for biochemical oxygen demand and total suspended solids, ensuring compliance with federal and state water quality standards. The plant's treated effluent is discharged into the Mississippi River, a major waterway that flows into the Gulf of Mexico. The Mississippi River basin supports diverse aquatic life and provides drinking water for millions downstream. Proper treatment at this facility helps protect the river's ecological health and recreational uses.

The plant discharges into the Mississippi River, which flows southward through the Mississippi River Delta to the Gulf of Mexico. This river system supports a wide range of aquatic species and serves as a critical migratory corridor for birds and fish. The watershed includes agricultural and urban areas, making nutrient management important to prevent downstream hypoxia in the Gulf.