Is Long Lost Lake Safe for Swimming?
Long Lost Lake in Clearwater County, Minnesota has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 23 ft visibility. Phosphorus: 10.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 23 ft |
| Phosphorus | 10.5 μg/L |
| Maximum Depth | 63 ft |
| Location | Clearwater County, Minnesota |
How does Long Lost Lake compare?
With an overall water quality grade of A, Long Lost Lake matches or beats the Minnesota state average of Grade C. It ranks #8 of 40 lakes in Clearwater County by water quality score.
Water clarity (Secchi depth) sits at 23 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.