BUHL WWTP - Advanced Wastewater Treatment in Morse Township, Minnesota

BUHL WWTP is a wastewater treatment facility located in Morse Township, Saint Louis County, Minnesota, serving a population of 887. The plant operates in a rural area near the Mesabi Trail and Burntside, within the Superior National Forest region. As a small-scale facility, it plays a key role in managing local wastewater in this northern Minnesota community. The plant provides advanced treatment, which goes beyond the secondary treatment standard required by the U.S. Clean Water Act. Advanced treatment typically includes nutrient removal or additional filtration to reduce pollutants further. The plant's designed capacity is 605.66 thousand cubic meters, with an actual discharge volume of 264.98 thousand cubic meters, indicating it operates well below capacity. Under the National Pollutant Discharge Elimination System (NPDES), such facilities must meet strict effluent limits to protect water quality. The treated effluent is discharged into local waterways that drain into the Rainy River watershed, eventually reaching Lake of the Woods and the Hudson Bay drainage basin. This region is ecologically sensitive, supporting diverse aquatic life and serving as a habitat for fish and migratory birds. The advanced treatment helps minimize nutrient loading and protects downstream ecosystems.

The plant discharges into the Rainy River watershed, which flows northward into Lake of the Woods and ultimately into Hudson Bay via the Nelson River. This remote boreal forest region supports cold-water fisheries, including walleye and northern pike, and provides critical habitat for migratory waterfowl. Advanced treatment reduces phosphorus and nitrogen loads, helping to prevent eutrophication in downstream lakes and rivers.