How Clean Is Osakis Lake?
Osakis Lake has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 10.5 ft. Phosphorus: 77 µg/L. Trophic State Index: 55.
Cleanliness Snapshot
| Metric | Osakis Lake | Minnesota avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 10.5 ft | — |
| Phosphorus | 77 µg/L | <30 = clean |
| Trophic State Index | 55 | <50 = clean |
How does Osakis Lake compare?
Osakis Lake's grade of C matches or beats the Minnesota state average of C. It ranks #13 of 17 lakes in Todd County by water quality score. Multi-year monitoring data shows water quality is improving based on 3 years of records.