F
Olson Lake
Big Stone County, Minnesota
Water Quality Grade: F — Very Poor
Very murky — less than 0.7 feet of visibility. Phosphorus level: 782 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.2 m | F |
| Phosphorus | 782 µg/L | F |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #13 of 13 lakes in Big Stone County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-07-31
Monitoring stations: 1