Caldwell WWTP - Secondary Wastewater Treatment Plant in Caldwell, Kansas

Caldwell WWTP is a municipal wastewater treatment plant located in Caldwell, Kansas, serving a population of approximately 1,300 residents. The facility is situated in Sumner County, a rural area in the south-central part of the state. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater. With a designed capacity of 567.81 thousand cubic meters per year, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Kansas Department of Health and Environment. The treated effluent is discharged into local waterways that ultimately drain into the Arkansas River basin. This watershed supports agricultural activities and provides habitat for diverse aquatic species. Proper treatment helps protect downstream water quality in the Arkansas River and its tributaries.

The plant discharges into the Arkansas River basin, which flows through Kansas and Oklahoma before joining the Mississippi River system. The watershed supports agricultural irrigation and provides habitat for fish and wildlife. Effective secondary treatment reduces nutrient and organic loads, helping to prevent eutrophication in downstream reservoirs and maintaining ecological balance in the river system.