How Clean Is Crab Lake?
Crab 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): 13 ft. Trophic State Index: 40.
Cleanliness Snapshot
| Metric | Crab Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 13 ft | — |
| Trophic State Index | 40 | <50 = clean |
How does Crab Lake compare?
Crab Lake's grade of B matches or beats the Minnesota state average of C. It ranks #65 of 187 lakes in St. Louis County by water quality score.