How Clean Is Island Lake?
Island Lake is a clean lake by Minnesota standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 14.6 ft. Phosphorus: 20 µg/L. Trophic State Index: 43.
Cleanliness Snapshot
| Metric | Island Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 14.6 ft | — |
| Phosphorus | 20 µg/L | <30 = clean |
| Trophic State Index | 43 | <50 = clean |
How does Island Lake compare?
Island Lake's grade of B matches or beats the Minnesota state average of C. It ranks #42 of 93 lakes in Becker County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.