Nashwauk STP - Secondary Wastewater Treatment in Nashwauk, Minnesota

Nashwauk STP is a municipal wastewater treatment facility located in Nashwauk, Itasca County, Minnesota, serving a population of 1,681. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring effective removal of organic matter and suspended solids. The plant has a designed capacity of 548.88 cubic meters per day and currently discharges an average of 541.31 cubic meters per day, indicating near-capacity operation. As a US facility, it operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged into a local water body within the Mississippi River basin. The plant plays a key role in protecting downstream aquatic ecosystems, including the Mississippi River and its tributaries, by reducing nutrient and pollutant loads from the community.

The plant discharges into a water body within the Mississippi River basin, which ultimately drains into the Gulf of Mexico. This region supports diverse aquatic life and is part of a major migratory corridor for waterfowl. The plant's secondary treatment helps reduce nutrient loading, which is critical for mitigating hypoxia in the Gulf of Mexico.