How Clean Is Little Mcdonald Lake?
Little Mcdonald 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): 26.9 ft. Phosphorus: 7 µg/L. Trophic State Index: 31.
Cleanliness Snapshot
| Metric | Little Mcdonald Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 26.9 ft | — |
| Phosphorus | 7 µg/L | <30 = clean |
| Trophic State Index | 31 | <50 = clean |
How does Little Mcdonald Lake compare?
Little Mcdonald Lake's grade of A matches or beats the Minnesota state average of C. It ranks #13 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.