C
Big Butternut Lake
Polk County, Wisconsin
Water Quality Grade: C — Fair
Good clarity — visible to about 14.8 feet. Phosphorus level: 62.1 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 m | B |
| Phosphorus | 62.1 µg/L | D |
| Chlorophyll-a (Algae) | No data |
Location
Loading map...
County Ranking
Ranked #64 of 77 lakes in Polk County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-01
Monitoring stations: 1