Kandiyohi STP - Advanced Wastewater Treatment in Atwater, Minnesota

Kandiyohi STP is a municipal wastewater treatment facility located in Atwater, Kandiyohi County, Minnesota, United States. The plant serves a population of approximately 478 residents, providing advanced treatment to protect local water quality. The plant operates under the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for discharges. As an advanced treatment facility, it goes beyond secondary treatment standards, likely incorporating nutrient removal or other tertiary processes to meet stringent effluent limits. Treated effluent from the plant discharges into local waterways within the Minnesota River Basin, which ultimately drains into the Mississippi River. The plant plays a key role in safeguarding downstream aquatic ecosystems and supporting regional water quality goals.

The plant discharges into receiving waters within the Minnesota River Basin, a major tributary of the Mississippi River. This watershed supports diverse aquatic life and is an important migratory corridor for fish and birds. Advanced treatment helps reduce nutrient loading, which is critical for preventing eutrophication in downstream water bodies such as Lake Pepin and the Gulf of Mexico.