Is Island Lake Safe for Swimming?
Island Lake in Rusk County, Wisconsin has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 23.8 ft visibility. Phosphorus: 15.4 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 23.8 ft |
| Phosphorus | 15.4 μg/L |
| Maximum Depth | 54 ft |
| Location | Rusk County, Wisconsin |
How does Island Lake compare?
With an overall water quality grade of A, Island Lake matches or beats the Wisconsin state average of Grade B. It ranks #2 of 13 lakes in Rusk County by water quality score.
Water clarity (Secchi depth) sits at 23.8 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.