Is Mirror Lake Safe for Swimming?
Mirror Lake in Sauk County, Wisconsin has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 4.6 ft visibility. Phosphorus: 65.4 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 4.6 ft |
| Phosphorus | 65.4 μg/L |
| Location | Sauk County, Wisconsin |
How does Mirror Lake compare?
With an overall water quality grade of D, Mirror Lake falls below the Wisconsin state average of Grade C. It ranks #8 of 11 lakes in Sauk County by water quality score.
Water clarity (Secchi depth) sits at 4.6 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment.