Is Oconomowoc Lake Safe for Swimming?
Oconomowoc Lake in Waukesha County, Wisconsin has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 13 ft visibility. Phosphorus: 11.7 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 13 ft |
| Phosphorus | 11.7 μg/L |
| Location | Waukesha County, Wisconsin |
How does Oconomowoc Lake compare?
With an overall water quality grade of A, Oconomowoc Lake matches or beats the Wisconsin state average of Grade C. It ranks #14 of 45 lakes in Waukesha County by water quality score.
Water clarity (Secchi depth) sits at 13 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.