COGGON WWTP - Coggon, Iowa Wastewater Treatment Plant

COGGON WWTP is a municipal wastewater treatment facility located in Coggon, Iowa, serving a population of approximately 658 residents. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring compliance with federal and state water quality standards. The plant has a designed capacity of 370.97 m³/day and currently discharges an average volume of 189.27 m³/day. As a secondary treatment facility, it utilizes biological processes to reduce organic matter and suspended solids. The plant operates under the US Clean Water Act, with permits issued by the Iowa Department of Natural Resources, which set effluent limits to protect receiving waters. The treated effluent is discharged into a local waterway that ultimately drains into the Mississippi River basin. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant's operation helps maintain water quality in the region, preventing nutrient pollution and protecting recreational uses.

The plant's discharge enters a tributary of the Wapsipinicon River, which flows into the Mississippi River. This watershed is part of the Upper Mississippi River basin, a critical habitat for fish and migratory birds. The region's agricultural landscape contributes nutrient runoff, making the plant's nutrient removal important for preventing algal blooms in downstream waters.