Coon Rapids WWTP - Secondary Treatment Plant in Guthrie County, Iowa

Coon Rapids WWTP is a municipal wastewater treatment facility located in Guthrie County, Iowa, United States. The plant serves a population of approximately 1,266 residents, classifying it as a small-scale treatment facility within the state's wastewater infrastructure. The plant employs secondary treatment processes, which is the standard level required by the US Clean Water Act for municipal wastewater treatment. With a designed capacity of 719.23 thousand gallons per day and an average discharge volume of 529.96 thousand gallons per day, the facility operates below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local receiving waters that ultimately drain into the Mississippi River basin. As part of the Iowa watershed, the plant plays a role in protecting downstream water quality and aquatic ecosystems. Its operations are subject to EPA NPDES permitting, ensuring compliance with federal and state water quality standards.

The plant discharges into local streams that flow into the Raccoon River, a tributary of the Des Moines River, which eventually joins the Mississippi River. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant's secondary treatment helps reduce organic pollutants and suspended solids, protecting the ecological health of these water bodies.