Is Forest Lake Safe for Swimming?
Forest Lake in Vilas County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 22.2 ft visibility. Phosphorus: 12.8 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 22.2 ft |
| Phosphorus | 12.8 μg/L |
| Maximum Depth | 60 ft |
| Location | Vilas County, Wisconsin |
How does Forest Lake compare?
With an overall water quality grade of B, Forest Lake matches or beats the Wisconsin state average of Grade B. It ranks #37 of 103 lakes in Vilas County by water quality score.
Water clarity (Secchi depth) sits at 22.2 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.