SEYMOUR STL Wastewater Treatment Plant, Seymour, Iowa

SEYMOUR STL is a municipal wastewater treatment facility located in Seymour, Iowa, United States. The plant serves a small population of 701 residents, providing essential sanitation services for the community. It is situated in Wayne County, a rural area in southern Iowa. The plant operates at the secondary treatment level, which is the standard required by the US Clean Water Act for municipal facilities. With a designed capacity of 378.54 cubic meters per day and a current discharge volume of 416.40 cubic meters per day, the plant manages wastewater from the local community. Under the National Pollutant Discharge Elimination System (NPDES), plants of this scale are typically permitted by the Iowa Department of Natural Resources to ensure compliance with water quality standards. The treated effluent from SEYMOUR STL is discharged into local waterways that ultimately drain into the Mississippi River basin. This contributes to the protection of downstream aquatic ecosystems, including the Mississippi River and the Gulf of Mexico. The plant plays a vital role in preventing untreated sewage from entering the environment, thereby safeguarding public health and local water quality.

The plant discharges into small streams in the Chariton River watershed, which flows into the Des Moines River and eventually the Mississippi River. This drainage network supports diverse aquatic life and provides habitat for fish and migratory birds. The region's agricultural landscape means the plant's nutrient removal helps reduce downstream impacts on the Gulf of Mexico hypoxic zone.