How Clean Is Two Island Lake?
Two Island Lake is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 9 ft. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 3.4 µg/L. Trophic State Index: 43.
Cleanliness Snapshot
| Metric | Two Island Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 9 ft | — |
| Phosphorus | 12 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3.4 µg/L | <10 = clean |
| Trophic State Index | 43 | <50 = clean |
How does Two Island Lake compare?
Two Island Lake's grade of A matches or beats the Minnesota state average of C. It ranks #22 of 44 lakes in Cook County by water quality score. Multi-year monitoring data shows water quality is improving based on 3 years of records.