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): 23 ft. Phosphorus: 10.8 µg/L. Trophic State Index: 35.
Cleanliness Snapshot
| Metric | Stone Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 23 ft | — |
| Phosphorus | 10.8 µg/L | <30 = clean |
| Trophic State Index | 35 | <50 = clean |
How does Stone Lake compare?
Stone Lake's grade of A matches or beats the Wisconsin state average of C. It ranks #3 of 47 lakes in Washburn County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.