B
Mirror Lake
Sauk County, Wisconsin
Water Quality Grade: B — Good
Crystal clear — you can see 15.6 feet down. Phosphorus level: 65.4 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.75 m | A |
| Phosphorus | 65.4 µg/L | D |
| Chlorophyll-a (Algae) | No data |
Location
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County Ranking
Ranked #6 of 11 lakes in Sauk County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-02
Monitoring stations: 2