Is Roosevelt Lake Safe for Swimming?
Roosevelt Lake in Cass County, Minnesota has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 11.1 ft visibility. Phosphorus: 12.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 11.1 ft |
| Phosphorus | 12.5 μg/L |
| Maximum Depth | 129 ft |
| Location | Cass County, Minnesota |
How does Roosevelt Lake compare?
With an overall water quality grade of A, Roosevelt Lake matches or beats the Minnesota state average of Grade C. It ranks #61 of 132 lakes in Cass County by water quality score.
Water clarity (Secchi depth) sits at 11.1 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.