Westfield WWTP - Plymouth County, Iowa Wastewater Treatment Plant

Westfield WWTP is a municipal wastewater treatment facility located in Plymouth County, Iowa, United States. The plant serves a small population of 160 residents, reflecting its role in a rural community. It operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal plants. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 75.71 units and a current discharge volume of 53.00 units, the facility operates below its capacity, indicating room for growth or seasonal variability. As a U.S. plant, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Iowa Department of Natural Resources. The treated effluent is discharged into a local water body, likely a tributary of the Missouri River, which flows into the Mississippi River and eventually the Gulf of Mexico. The plant's operations help protect downstream water quality in this agriculturally intensive region, supporting aquatic life and recreational uses.

The plant discharges into a local stream within the Missouri River basin, which drains into the Mississippi River and ultimately the Gulf of Mexico. The surrounding area is predominantly agricultural, with row crops and livestock operations. The plant's secondary treatment reduces nutrient loads, helping to mitigate downstream eutrophication and hypoxia in the Gulf. The local watershed supports diverse aquatic species and provides habitat for migratory birds.