Is Birch Lake Safe for Swimming?
Birch Lake in Vilas County, Wisconsin has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 21.3 ft visibility. Phosphorus: 16.6 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 21.3 ft |
| Phosphorus | 16.6 μg/L |
| Maximum Depth | 45 ft |
| Location | Vilas County, Wisconsin |
How does Birch Lake compare?
With an overall water quality grade of A, Birch Lake matches or beats the Wisconsin state average of Grade B. It ranks #13 of 202 lakes in Vilas County by water quality score.
Water clarity (Secchi depth) sits at 21.3 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.