Lake Adelle Sewer Dist Wastewater Treatment Plant, Jefferson County, Missouri

Lake Adelle Sewer Dist is a municipal wastewater treatment facility located in Jefferson County, Missouri, within the Big River Township. The plant serves a small population of 65 residents, reflecting its role as a local-scale treatment system in a rural area of the state. The facility provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for most municipal plants. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's designed capacity is 189.27 units, with an actual discharge volume of 22.71 units, indicating it operates well below its capacity. The treated effluent is discharged into a local waterway that ultimately drains into the Mississippi River basin. The plant's operations are subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Missouri Department of Natural Resources, ensuring compliance with water quality standards to protect downstream aquatic ecosystems.

The plant discharges into a tributary of the Big River, which flows into the Meramec River and then the Mississippi River. The Mississippi River basin supports diverse aquatic life and provides drinking water for millions. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream water quality in this ecologically significant watershed.