Is Callahan Lake Safe for Swimming?
Callahan Lake in Sawyer County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 10.6 ft visibility. Phosphorus: 22.3 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 10.6 ft |
| Phosphorus | 22.3 μg/L |
| Location | Sawyer County, Wisconsin |
How does Callahan Lake compare?
With an overall water quality grade of B, Callahan Lake matches or beats the Wisconsin state average of Grade C. It ranks #27 of 50 lakes in Sawyer County by water quality score.
Water clarity (Secchi depth) sits at 10.6 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.