Grimes WWTP - Wastewater Treatment Plant in Grimes, Iowa

Grimes WWTP is a wastewater treatment facility located in Grimes, Iowa, serving a population of about 8,378. The plant is situated in Polk County and is part of the city's municipal wastewater management system. As a medium-sized facility, it plays a key role in treating domestic wastewater from the community. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. The National Pollutant Discharge Elimination System (NPDES) permit program governs discharge limits and monitoring. For a plant serving this population, typical treatment includes biological processes to reduce organic matter and solids. The treated effluent is discharged into local waterways that drain into the Des Moines River basin, ultimately reaching the Mississippi River. This watershed supports diverse aquatic life and provides water for downstream communities. The plant's operations help protect water quality in the region.

The plant discharges into the Des Moines River watershed, which flows into the Mississippi River and eventually the Gulf of Mexico. This river system supports a variety of fish and wildlife, including migratory birds and freshwater mussels. The watershed is ecologically sensitive, with nutrient management being a key concern due to downstream hypoxia in the Gulf.