How Clean Is Thunder Lake?
Thunder 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): 16.4 ft. Trophic State Index: 37.
Cleanliness Snapshot
| Metric | Thunder Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | B |
| Water Clarity (Secchi) | 16.4 ft | — |
| Trophic State Index | 37 | <50 = clean |
How does Thunder Lake compare?
Thunder Lake's grade of A matches or beats the Wisconsin state average of B. It ranks #22 of 140 lakes in Oneida County by water quality score.