Is Red Rock Lake Safe for Swimming?
Red Rock Lake in Cook County, Minnesota has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 12.7 ft visibility. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 12.7 ft |
| Maximum Depth | 64 ft |
| Location | Cook County, Minnesota |
How does Red Rock Lake compare?
With an overall water quality grade of B, Red Rock Lake matches or beats the Minnesota state average of Grade C. It ranks #44 of 128 lakes in Cook County by water quality score.
Water clarity (Secchi depth) sits at 12.7 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.