A
Birch Lake
Vilas County, Wisconsin
Water Quality Grade: A — Excellent
Crystal clear — you can see 21.3 feet down. Phosphorus level: 16.6 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.5 m | A |
| Phosphorus | 16.6 µg/L | A |
| Chlorophyll-a (Algae) | No data |
Location
Loading map...
County Ranking
Ranked #13 of 202 lakes in Vilas County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-28
Monitoring stations: 1