A
Loon Lake
St. Louis County, Minnesota
Water Quality Grade: A — Excellent
Crystal clear — you can see 21.7 feet down. Chlorophyll-a: 2.8 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.6 m | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 2.8 µg/L | A |
County Ranking
Ranked #15 of 198 lakes in St. Louis County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-07-22
Monitoring stations: 1