Is Clark Lake Safe for Swimming?
Clark Lake in Door County, Wisconsin has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 41 ft visibility. Phosphorus: 10.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 41 ft |
| Phosphorus | 10.5 μg/L |
| Maximum Depth | 25 ft |
| Location | Door County, Wisconsin |
How does Clark Lake compare?
With an overall water quality grade of A, Clark Lake matches or beats the Wisconsin state average of Grade B. It ranks #1 of 11 lakes in Door County by water quality score.
Water clarity (Secchi depth) sits at 41 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.