How Clean Is Outlet of Onamia Lake on the Rum River?
Outlet of Onamia Lake on the Rum River is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 0.6 µg/L. Trophic State Index: 38.
Cleanliness Snapshot
| Metric | Outlet of Onamia Lake on the Rum River | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Phosphorus | 25 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 0.6 µg/L | <10 = clean |
| Trophic State Index | 38 | <50 = clean |
How does Outlet of Onamia Lake on the Rum River compare?
Outlet of Onamia Lake on the Rum River's grade of A matches or beats the Minnesota state average of C. It ranks #7 of 11 lakes in Mille Lacs County by water quality score. Multi-year monitoring data shows water quality is improving based on 2 years of records.