Is Upper South Long Lake Safe for Swimming?
Upper South Long Lake in Crow Wing County, Minnesota has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 6 ft visibility. Phosphorus: 17 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 6 ft |
| Phosphorus | 17 μg/L |
| Maximum Depth | 47 ft |
| Location | Crow Wing County, Minnesota |
How does Upper South Long Lake compare?
With an overall water quality grade of B, Upper South Long Lake matches or beats the Minnesota state average of Grade C. It ranks #91 of 120 lakes in Crow Wing County by water quality score.
Water clarity (Secchi depth) sits at 6 feet. That puts the lake in good clarity range, with limited algae interference.