How Clean Is Bear Head Lake?
Bear Head 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): 11 ft. Phosphorus: 19.5 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Trophic State Index: 44.
Cleanliness Snapshot
| Metric | Bear Head Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 11 ft | — |
| Phosphorus | 19.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3.6 µg/L | <10 = clean |
| Trophic State Index | 44 | <50 = clean |
How does Bear Head Lake compare?
Bear Head Lake's grade of A matches or beats the Minnesota state average of C. It ranks #26 of 68 lakes in St. Louis County by water quality score. Multi-year monitoring data shows water quality is stable based on 4 years of records.