Pilot Mound WWTP - Secondary Wastewater Treatment in Pilot Mound, Iowa

Pilot Mound WWTP is a municipal wastewater treatment facility located in Pilot Mound, Iowa, United States. It serves a small population of 214 residents in this rural community within Boone County. The plant is situated on South Pilot Street and operates as a secondary treatment facility. The plant has a designed capacity of 113.56 megaliters and currently discharges 75.71 megaliters of treated wastewater annually. As a secondary treatment plant, it meets the standard requirements under the US Clean Water Act for removing organic matter and suspended solids. The National Pollutant Discharge Elimination System (NPDES) permit program governs its operations, ensuring compliance with water quality standards. The treated effluent is discharged into local waterways that drain into the Des Moines River basin, ultimately reaching the Mississippi River. This small-scale plant plays a vital role in protecting the local watershed from untreated sewage, supporting aquatic life and downstream water quality in the region.

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 ecosystems and is part of a major migratory corridor for birds and fish. The secondary treatment process helps reduce nutrient loads that could contribute to hypoxia in the Gulf.