How Clean Is Spirit Lake?
Spirit 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): 18 ft. Trophic State Index: 35.
Cleanliness Snapshot
| Metric | Spirit Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | B |
| Water Clarity (Secchi) | 18 ft | — |
| Trophic State Index | 35 | <50 = clean |
How does Spirit Lake compare?
Spirit Lake's grade of A matches or beats the Wisconsin state average of B. It ranks #5 of 70 lakes in Burnett County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.