B
Osnuhsa Lake
Brown County, Wisconsin
Water Quality Grade: B — Good
Crystal clear — you can see 18.4 feet down. Phosphorus level: 39.5 µg/L. Chlorophyll-a: 12 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.6 m | A |
| Phosphorus | 39.5 µg/L | C |
| Chlorophyll-a (Algae) | 12 µg/L | C |
County Ranking
Ranked #3 of 4 lakes in Brown County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-16
Monitoring stations: 1