Spragueville STP - Secondary Wastewater Treatment Plant in Spragueville, Iowa

Spragueville STP is a municipal wastewater treatment facility located on East Main Street in Spragueville, Jackson County, Iowa. The plant serves a small population of 89 residents, reflecting the rural character of the community. It provides secondary treatment, a standard level for small agglomerations in the United States. The plant has a designed capacity of 75.71 m3/day and currently discharges 37.85 m3/day of treated wastewater. As a U.S. facility, it operates under the Clean Water Act and is permitted through the National Pollutant Discharge Elimination System (NPDES), administered by the Iowa Department of Natural Resources. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged to a local waterway, likely a tributary of the Maquoketa River, which flows into the Mississippi River. The Mississippi River system supports diverse aquatic life and is a major migratory corridor for birds and fish. The plant's small scale and inland location minimize its environmental footprint.

The plant discharges into a local stream that drains into the Maquoketa River, a tributary of the Mississippi River. The Mississippi River basin is one of the largest in North America, supporting diverse fish species and providing critical habitat for migratory waterfowl. The region's agricultural landscape means that nutrient management is important to prevent downstream eutrophication in the Gulf of Mexico.