MOUND CITY WWTP - Linn County, Kansas Wastewater Treatment Plant

MOUND CITY WWTP is a municipal wastewater treatment facility located in Linn County, Kansas, United States. The plant serves a small population of 821 residents, reflecting its role in a rural community. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant's designed capacity is 416.39 units, with an actual discharge volume of 310.40 units, indicating operational headroom. Under the U.S. Clean Water Act, secondary treatment is the minimum standard for municipal wastewater plants, and the facility likely operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Kansas Department of Health and Environment. The treated effluent is discharged into a local water body, which ultimately drains into the Marais des Cygnes River basin and then into the Osage River system, part of the Missouri River watershed. This inland location supports regional water quality and downstream ecosystems, including aquatic habitats in the Mississippi River basin.

The plant discharges into a tributary of the Marais des Cygnes River, which flows into the Osage River and eventually the Missouri River. This watershed supports diverse aquatic life and provides habitat for fish and migratory birds. The secondary treatment process helps protect downstream water quality by reducing nutrient loads and organic pollutants.