D
Koochiching County Lake Quality
Minnesota — 8 lakes, average grade D (Poor)
All Lakes in Koochiching County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Rainy Lake | C | 2.4m | — |
| 2 | Rainy Lake | C | 2.29m | — |
| 3 | Bartlett Lake | C | 1.22m | 37 µg/L |
| 4 | Rainy Lake, Visitor Center Ramp, Voyageurs Np | D | 1.1m | — |
| 5 | Rainy Lake, Dove Bay, Voyageurs Np | D | 2m | — |
| 6 | Rainy Lake, Harrison Bay, Dryweed Island | D | 1.5m | — |
| 7 | Rainy Lake, Black Bay Narrows | D | 1.1m | — |
| 8 | Rainy Lake | D | 1.6m | — |