How Clean Is Stone Lake?
Stone Lake is among the cleanest lakes in Wisconsin. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 75.5 ft. Phosphorus: 10.8 µg/L. Trophic State Index: 27.
Cleanliness Snapshot
| Metric | Stone Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | B |
| Water Clarity (Secchi) | 75.5 ft | — |
| Phosphorus | 10.8 µg/L | <30 = clean |
| Trophic State Index | 27 | <50 = clean |
How does Stone Lake compare?
Stone Lake's grade of A matches or beats the Wisconsin state average of B. It ranks #12 of 48 lakes in Washburn County by water quality score. Multi-year monitoring data shows water quality is stable based on 7 years of records.