Is Delavan Lake Safe for Swimming?
Delavan Lake in Walworth County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 24.8 ft visibility. Phosphorus: 49.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 24.8 ft |
| Phosphorus | 49.5 μg/L |
| Maximum Depth | 52 ft |
| Location | Walworth County, Wisconsin |
How does Delavan Lake compare?
With an overall water quality grade of B, Delavan Lake matches or beats the Wisconsin state average of Grade B. It ranks #20 of 34 lakes in Walworth County by water quality score.
Water clarity (Secchi depth) sits at 24.8 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.