How Clean Is Clear Lake?
Clear 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): 6.3 ft. Trophic State Index: 51.
Cleanliness Snapshot
| Metric | Clear Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 6.3 ft | — |
| Trophic State Index | 51 | <50 = clean |
How does Clear Lake compare?
Clear Lake's grade of D falls below the Minnesota state average of C. It ranks #90 of 97 lakes in Otter Tail County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.