INMAN WWTP - McPherson County, Kansas Wastewater Treatment Plant

INMAN WWTP is a municipal wastewater treatment facility located in McPherson County, Kansas, United States. The plant serves a small population of around 1,194 residents, reflecting its role in a rural or small-town community. As a secondary treatment plant, it provides biological treatment to remove organic matter and suspended solids from wastewater. The plant has a designed capacity of 499.67 thousand cubic meters per year and currently discharges 450.46 thousand cubic meters annually, indicating it operates below its full capacity. Under the U.S. Clean Water Act, secondary treatment is the minimum standard for municipal wastewater plants, and the facility is likely regulated under an EPA NPDES permit issued by the Kansas Department of Health and Environment. The treated effluent from INMAN WWTP is discharged into a local waterway that ultimately drains into the Arkansas River basin, which flows through Kansas and Oklahoma before reaching the Mississippi River. The plant's operations help protect downstream water quality and aquatic ecosystems in the region.

The plant discharges into a tributary of the Arkansas River, which flows through the Great Plains region. The Arkansas River supports diverse aquatic life and provides water for irrigation and municipal use. Downstream, the river joins the Mississippi River, contributing to one of the largest river systems in North America. The plant's secondary treatment helps reduce nutrient and organic pollution, protecting the ecological health of the watershed.