C
Lake Monona -
Dane County, Wisconsin
Water Quality Grade: C — Fair
Crystal clear — you can see 22.1 feet down. Phosphorus level: 94 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.75 m | A |
| Phosphorus | 94 µg/L | F |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #12 of 28 lakes in Dane County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-11-20
Monitoring stations: 1