AL CO S D 1 WWTP - Allen County, Kansas Wastewater Treatment Plant

AL CO S D 1 WWTP is a municipal wastewater treatment facility located in Allen County, Kansas, United States. The plant serves a small population of 450 residents, reflecting its role in a rural or small-town setting within the state. The plant provides secondary treatment, which is the standard biological treatment process required under the U.S. Clean Water Act for most municipal facilities. Its designed capacity is 329.33 units, with an actual discharge volume of 170.34 units, indicating operational headroom. 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, ensuring compliance with federal water quality standards. The treated effluent is discharged into a local waterway that ultimately drains into the Neosho River basin, part of the larger Arkansas River watershed. This system flows through the Great Plains region, supporting agricultural irrigation and aquatic habitats. The plant's secondary treatment helps protect downstream water quality in this ecologically important river system.

The plant discharges into a tributary of the Neosho River, which flows into the Arkansas River and eventually reaches the Mississippi River system. This watershed supports diverse aquatic life and provides water for agriculture in the region. The secondary treatment process reduces organic pollutants and suspended solids, helping maintain the ecological health of the receiving waters.