A
Spider Lake - Little Spider Basin Big
Sawyer County, Wisconsin
Water Quality Grade: A — Excellent
Crystal clear — you can see 34.9 feet down. Phosphorus level: 13.6 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.63 m | A |
| Phosphorus | 13.6 µg/L | A |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #17 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: 2025-08-30
Monitoring stations: 1