WINDSOR SW LAGOON Wastewater Treatment Plant, Pettis County, Missouri

WINDSOR SW LAGOON is a municipal wastewater treatment facility located in Pettis County, Missouri, United States. The plant serves a population of approximately 1,944 residents and operates as a secondary treatment facility, which is the standard level required under the U.S. Clean Water Act for most municipal plants. Its designed capacity is 1,703.43 million gallons per year, with an actual discharge volume of 764.65 million gallons per year. The plant's treatment process involves secondary treatment, which typically includes biological processes to remove organic matter and suspended solids. As a lagoon system, it likely uses stabilization ponds or aerated lagoons to treat wastewater before discharge. Under the U.S. Clean Water Act, such facilities must comply with National Pollutant Discharge Elimination System (NPDES) permits issued by the Missouri Department of Natural Resources, which set effluent limits to protect water quality. The treated effluent from WINDSOR SW LAGOON is discharged into a local receiving water body, which eventually drains into the Missouri River watershed and ultimately the Mississippi River. The plant's inland location, over 50 km from the coast, means its discharge affects freshwater ecosystems rather than marine environments. Proper treatment helps protect downstream aquatic life and water quality in the region's rivers and streams.

The plant discharges into a local water body that is part of the Missouri River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. This inland watershed supports diverse aquatic species and is used for recreation, agriculture, and drinking water. The secondary treatment provided by the plant helps reduce nutrient and organic pollutant loads, mitigating the risk of eutrophication and oxygen depletion in downstream waters.