Is Butternut Lake Safe for Swimming?
Butternut Lake in Forest County, Wisconsin has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 19.5 ft visibility. Phosphorus: 11.8 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 19.5 ft |
| Phosphorus | 11.8 μg/L |
| Maximum Depth | 42 ft |
| Location | Forest County, Wisconsin |
How does Butternut Lake compare?
With an overall water quality grade of A, Butternut Lake matches or beats the Wisconsin state average of Grade C. It ranks #3 of 34 lakes in Forest County by water quality score.
Water clarity (Secchi depth) sits at 19.5 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.