How Clean Is Butternut Lake?
Butternut 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): 19.5 ft. Phosphorus: 11.8 µg/L. Trophic State Index: 37.
Cleanliness Snapshot
| Metric | Butternut Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 19.5 ft | — |
| Phosphorus | 11.8 µg/L | <30 = clean |
| Trophic State Index | 37 | <50 = clean |
How does Butternut Lake compare?
Butternut Lake's grade of A matches or beats the Wisconsin state average of C. It ranks #3 of 34 lakes in Forest County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.