Is Blackduck Lake Safe for Swimming?
Blackduck Lake in Beltrami County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 6.2 ft visibility. Phosphorus: 39.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 6.2 ft |
| Phosphorus | 39.5 μg/L |
| Maximum Depth | 28 ft |
| Location | Beltrami 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 #81 of 86 lakes in Beltrami County by water quality score.
Water clarity (Secchi depth) sits at 6.2 feet. That puts the lake in good clarity range, with limited algae interference.