Agency WWTP - Secondary Treatment Facility in Agency, Iowa

Agency WWTP is a municipal wastewater treatment facility located in Agency, Wapello County, Iowa, United States. The plant serves a small population of 616 residents, providing secondary treatment to meet local environmental standards. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 378.54 megaliters and an annual discharge volume of 302.83 megaliters, the facility operates well within its capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local waterways, contributing to the Des Moines River watershed, which ultimately drains to the Mississippi River. The plant plays a key role in protecting water quality in this agricultural region, supporting downstream aquatic ecosystems and recreational uses.

The plant discharges into the Des Moines River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. This watershed supports diverse aquatic life and is an important migratory corridor for birds. The region's agricultural landscape means the plant helps mitigate nutrient loading, which is critical for preventing downstream hypoxia in the Gulf.