A
Grindstone Lake
Sawyer County, Wisconsin
Water Quality Grade: A — Excellent
Crystal clear — you can see 57.7 feet down. Phosphorus level: 15 µg/L. Chlorophyll-a: 1.7 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.6 m | A |
| Phosphorus | 15 µg/L | A |
| Chlorophyll-a (Algae) | 1.7 µg/L | A |
County Ranking
Ranked #3 of 98 lakes in Sawyer County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-04
Monitoring stations: 1