How Clean Is Island Lake?
Island Lake is a clean lake by Wisconsin standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 9.9 ft. Trophic State Index: 44.
Cleanliness Snapshot
| Metric | Island Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 9.9 ft | — |
| Trophic State Index | 44 | <50 = clean |
How does Island Lake compare?
Island Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #90 of 191 lakes in Vilas County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.