C
Big Round Lake
Polk County, Wisconsin
Water Quality Grade: C — Fair
Murky — only visible to about 5.6 feet. Phosphorus level: 27.6 µg/L. Chlorophyll-a: 21 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.7 m | D |
| Phosphorus | 27.6 µg/L | B |
| Chlorophyll-a (Algae) | 21 µg/L | D |
Location
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County Ranking
Ranked #68 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: 2025-08-25
Monitoring stations: 3