Stockton WWTP - Secondary Treatment Plant in Stockton, Iowa

Stockton WWTP is a municipal wastewater treatment facility located in Stockton, Iowa, United States. The plant serves a small population of 187 residents, reflecting the rural character of the area. It is situated in Muscatine County, part of the Midwestern agricultural landscape. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 151.42 m³/day and an actual discharge volume of 75.71 m³/day, the facility operates well within its capacity. The plant is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Iowa Department of Natural Resources, ensuring compliance with water quality standards. The treated effluent is discharged into a local water body that drains into the Mississippi River basin, ultimately reaching the Gulf of Mexico. The plant plays a key role in protecting downstream water quality in this agriculturally intensive region, helping to reduce nutrient loads and maintain aquatic ecosystem health.

The plant discharges into a tributary of the Mississippi River, which flows south to the Gulf of Mexico. This region is part of the Mississippi River Basin, a critical watershed supporting diverse aquatic life and migratory birds. The plant's secondary treatment helps reduce organic pollutants and nutrients, mitigating eutrophication risks in downstream waters.