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): 7.7 ft. Phosphorus: 15.4 µg/L. Trophic State Index: 46.
Cleanliness Snapshot
| Metric | Island Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | B |
| Water Clarity (Secchi) | 7.7 ft | — |
| Phosphorus | 15.4 µg/L | <30 = clean |
| Trophic State Index | 46 | <50 = clean |
How does Island Lake compare?
Island Lake's grade of B matches or beats the Wisconsin state average of B. It ranks #2 of 4 lakes in Rusk County by water quality score. Multi-year monitoring data shows water quality is improving based on 3 years of records.
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