How Clean Is Crane Lake?
Crane Lake has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 6 ft. Trophic State Index: 51.
Cleanliness Snapshot
| Metric | Crane Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 6 ft | — |
| Trophic State Index | 51 | <50 = clean |
How does Crane Lake compare?
Crane Lake's grade of D falls below the Minnesota state average of C. It ranks #163 of 187 lakes in St. Louis County by water quality score. Multi-year monitoring data shows water quality is declining based on 5 years of records.