Is Grace Lake Safe for Swimming?
Grace Lake in Beltrami County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 15 ft visibility. Phosphorus: 21.5 µg/L. Chlorophyll-a (algae): 9.3 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 15 ft |
| Phosphorus | 21.5 μg/L |
| Chlorophyll-a (Algae) | 9.3 μg/L |
| Maximum Depth | 42 ft |
| Location | Beltrami County, Minnesota |
How does Grace Lake compare?
With an overall water quality grade of C, Grace Lake matches or beats the Minnesota state average of Grade C. It ranks #63 of 85 lakes in Beltrami County by water quality score.
Water clarity (Secchi depth) sits at 15 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae. Algae levels (chlorophyll-a) measure 9.3 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.