How Clean Is Mountain Lake?
Mountain 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): 19 ft. Trophic State Index: 35.
Cleanliness Snapshot
| Metric | Mountain Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 19 ft | — |
| Trophic State Index | 35 | <50 = clean |
How does Mountain Lake compare?
Mountain Lake's grade of A matches or beats the Minnesota state average of C. It ranks #4 of 6 lakes in Unknown County by water quality score. Multi-year monitoring data shows water quality is declining based on 4 years of records.