PARKER WWTP - Secondary Treatment Plant in Linn County, Kansas

PARKER WWTP is a municipal wastewater treatment facility located in rural Linn County, Kansas, United States. The plant serves a small population of 307 residents, reflecting its role in a sparsely populated agricultural region. It operates as part of the local infrastructure managed by county authorities. The plant provides secondary treatment, which is the standard biological treatment stage required by the U.S. Clean Water Act for municipal wastewater. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's designed capacity is 174.13 units, and it currently discharges 105.99 units, indicating operational headroom. Under the National Pollutant Discharge Elimination System (NPDES), plants of this scale must meet effluent limits set by the Kansas Department of Health and Environment. The treated effluent is discharged into local waterways that drain into the Marais des Cygnes River basin, eventually reaching the Missouri River and the Mississippi River system. This watershed supports diverse aquatic life and is important for regional water quality. The plant's inland location reduces direct marine impact, but its discharge contributes to the overall health of the river ecosystem.

The plant's discharge enters tributaries of the Marais des Cygnes River, which flows into the Missouri River and ultimately the Mississippi River. This inland watershed supports a variety of fish and wildlife species, including migratory birds and freshwater mussels. The region's agricultural land use means that nutrient management from wastewater is critical to prevent downstream eutrophication in lakes and reservoirs.