C
Mirror Lake - Site 1 South
Sauk County, Wisconsin
Water Quality Grade: C — Fair
Good clarity — visible to about 14.8 feet. Phosphorus level: 65.4 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 m | B |
| Phosphorus | 65.4 µg/L | D |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #12 of 21 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: 1