Is Blackduck Lake Safe for Swimming?
Blackduck Lake in St. Louis County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 6.8 ft visibility. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 6.8 ft |
| Maximum Depth | 30 ft |
| Location | St. Louis County, Minnesota |
How does Blackduck Lake compare?
With an overall water quality grade of C, Blackduck Lake matches or beats the Minnesota state average of Grade C. It ranks #107 of 187 lakes in St. Louis County by water quality score.
Water clarity (Secchi depth) sits at 6.8 feet. That puts the lake in good clarity range, with limited algae interference.