How Clean Is Ely Lake?
Ely 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): 17.1 ft. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Trophic State Index: 35.
Cleanliness Snapshot
| Metric | Ely Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 17.1 ft | — |
| Phosphorus | 7 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 2.1 µg/L | <10 = clean |
| Trophic State Index | 35 | <50 = clean |
How does Ely Lake compare?
Ely Lake's grade of A matches or beats the Minnesota state average of C. It ranks #20 of 68 lakes in St. Louis County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.
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