Is Upper Gull Lake Safe for Swimming?
Upper Gull Lake in Cass County, Minnesota has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 10 ft visibility. Phosphorus: 19 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 10 ft |
| Phosphorus | 19 μg/L |
| Maximum Depth | 54 ft |
| Location | Cass County, Minnesota |
How does Upper Gull Lake compare?
With an overall water quality grade of A, Upper Gull Lake matches or beats the Minnesota state average of Grade C. It ranks #56 of 133 lakes in Cass County by water quality score.
Water clarity (Secchi depth) sits at 10 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.