Is Delavan Lake Safe for Swimming?
Delavan Lake in Walworth County, Wisconsin has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 10 ft visibility. Phosphorus: 73 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 10 ft |
| Phosphorus | 73 μg/L |
| Location | Walworth County, Wisconsin |
How does Delavan Lake compare?
With an overall water quality grade of C, Delavan Lake matches or beats the Wisconsin state average of Grade C. It ranks #18 of 34 lakes in Walworth County by water quality score.
Water clarity (Secchi depth) sits at 10 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.