How Clean Is Deer Lake?
Deer 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): 11.5 ft. Phosphorus: 21 µg/L. Trophic State Index: 45.
Cleanliness Snapshot
| Metric | Deer Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 11.5 ft | — |
| Phosphorus | 21 µg/L | <30 = clean |
| Trophic State Index | 45 | <50 = clean |
How does Deer Lake compare?
Deer Lake's grade of B matches or beats the Minnesota state average of C. It ranks #47 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.