Is Oconomowoc Lake No. 1 Safe for Swimming?
Oconomowoc Lake No. 1 in Waukesha County, Wisconsin has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 13.8 ft visibility. Phosphorus: 16 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 13.8 ft |
| Phosphorus | 16 μg/L |
| Maximum Depth | 60 ft |
| Location | Waukesha County, Wisconsin |
How does Oconomowoc Lake No. 1 compare?
With an overall water quality grade of A, Oconomowoc Lake No. 1 matches or beats the Wisconsin state average of Grade B. It ranks #32 of 48 lakes in Waukesha County by water quality score.
Water clarity (Secchi depth) sits at 13.8 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.