A
Upper Gresham Lake
Vilas County, Wisconsin
Water Quality Grade: A — Excellent
Crystal clear — you can see 36.9 feet down. Phosphorus level: 13.4 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.25 m | A |
| Phosphorus | 13.4 µg/L | A |
| Chlorophyll-a (Algae) | No data |
Location
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County Ranking
Ranked #91 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: 2025-09-01
Monitoring stations: 2