A
Swan Lake -
Columbia County, WisconsinLimited Data
Water Quality Grade: A — Excellent
Crystal clear — you can see 15.6 feet down.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.75 m | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #1 of 15 lakes in Columbia County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-28
Monitoring stations: 1