Is Sturgeon Lake Safe for Swimming?
Sturgeon Lake in St. Louis County, Minnesota has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 13.8 ft visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 13.8 ft |
| Phosphorus | 12.5 μg/L |
| Chlorophyll-a (Algae) | 2.7 μg/L |
| Maximum Depth | 79.8 ft |
| Location | St. Louis County, Minnesota |
How does Sturgeon Lake compare?
With an overall water quality grade of A, Sturgeon Lake matches or beats the Minnesota state average of Grade C. It ranks #12 of 68 lakes in St. Louis County by water quality score.
Water clarity (Secchi depth) sits at 13.8 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae. Algae levels (chlorophyll-a) measure 2.7 µg/L — low and well within safe swimming guidelines.
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