Oswego WWTP - Secondary Wastewater Treatment Plant in Oswego, Kansas

Oswego WWTP is a municipal wastewater treatment facility located in Oswego, Labette County, Kansas. The plant serves a population of approximately 2,158 residents, providing essential sanitation services for this small community in the southeastern part of the state. The plant operates at the secondary treatment level, which is the standard required by the U.S. Clean Water Act for municipal wastewater treatment. With a designed capacity of 1,154.55 units and a current discharge volume of 730.58 units, the facility has adequate capacity to handle the community's wastewater flows. As a U.S. facility, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Kansas Department of Health and Environment, which sets effluent limits to protect water quality. The treated effluent from Oswego WWTP is discharged into a local receiving water body, which ultimately drains into the Neosho River basin. The Neosho River flows through southeastern Kansas into Oklahoma, where it joins the Arkansas River system. This watershed supports diverse aquatic life and provides water for agricultural and recreational uses downstream.

The plant discharges into a tributary of the Neosho River, which flows through the Verdigris River basin into the Arkansas River and eventually the Mississippi River. The Neosho River supports a variety of fish species and provides habitat for freshwater mussels. Downstream waters are used for irrigation and recreation, making nutrient and pathogen removal important for protecting water quality.