A
Outlet of Onamia Lake on the Rum River
Mille Lacs County, Minnesota
Water Quality Grade: A — Excellent
No clarity data. Phosphorus level: 25 µg/L. Chlorophyll-a: 0.6 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 25 µg/L | B |
| Chlorophyll-a (Algae) | 0.6 µg/L | A |
County Ranking
Ranked #9 of 13 lakes in Mille Lacs County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-10-08
Monitoring stations: 1