Cleanest Lakes in St. Louis County, Minnesota
Mukooda Lake in St. Louis County leads the rankings with a water quality grade of A and 16.6 ft of clarity. Below are the top 50 cleanest monitored lakes in St. Louis County, Minnesota, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Mukooda Lake | St. Louis | A | 16.6 ft | 17 µg/L | - |
| 2 | Silver Lake | St. Louis | A | 19.3 ft | 13.5 µg/L | - |
| 3 | Burntside Lake | St. Louis | A | 16 ft | 7 µg/L | - |
| 4 | St. Marys Lake | St. Louis | A | 16.8 ft | 7.5 µg/L | - |
| 5 | Deep Lake | St. Louis | A | 17.2 ft | 12 µg/L | - |
| 6 | Sabin Lake | St. Louis | A | 35 ft | 19.5 µg/L | - |
| 7 | Ely Lake | St. Louis | A | 16 ft | 7 µg/L | - |
| 8 | Cruiser Lake | St. Louis | A | 25.4 ft | 5.3 µg/L | - |
| 9 | Whitewater Lake | St. Louis | A | 15.4 ft | 14 µg/L | - |
| 10 | Joe Martin Lake | St. Louis | A | 14.5 ft | 9 µg/L | 2.3 µg/L |
| 11 | Island Lake | St. Louis | A | 14.5 ft | 8.5 µg/L | - |
| 12 | George Lake | St. Louis | A | 14.3 ft | 10 µg/L | - |
| 13 | Pleasant Lake | St. Louis | A | 10 ft | 12.5 µg/L | - |
| 14 | Little Trout Lake | St. Louis | A | 20.3 ft | 20.4 µg/L | - |
| 15 | Perch Lake | St. Louis | A | 13.5 ft | 11 µg/L | - |
| 16 | Side Lake | St. Louis | A | 11 ft | 11.5 µg/L | - |
| 17 | White Lake | St. Louis | A | 11.5 ft | 10 µg/L | - |
| 18 | Sturgeon Lake | St. Louis | A | 13.8 ft | 12.5 µg/L | - |
| 19 | Dodo Lake | St. Louis | A | 13 ft | 8.2 µg/L | - |
| 20 | Cadotte Lake | St. Louis | A | 10.2 ft | 13 µg/L | - |
| 21 | Bear Head Lake | St. Louis | A | 11 ft | 19.5 µg/L | - |
| 22 | Anne Lake | St. Louis | A | 14.4 ft | 9 µg/L | - |
| 23 | Brown Lake | St. Louis | B | 8.5 ft | 17.1 µg/L | - |
| 24 | Pine Lake | St. Louis | B | 7.5 ft | 15.5 µg/L | - |
| 25 | Loon Lake | St. Louis | B | 6.6 ft | - | 2.8 µg/L |
| 26 | Ryan Lake | St. Louis | B | 9.2 ft | 17 µg/L | - |
| 27 | Wynne Lake | St. Louis | B | 7.3 ft | 15.5 µg/L | - |
| 28 | Locator Lake | St. Louis | B | 8.5 ft | 17.2 µg/L | - |
| 29 | Finger Lake | St. Louis | B | 8.5 ft | 8 µg/L | - |
| 30 | West Twin Lake | St. Louis | B | 6.2 ft | 16.5 µg/L | 7.1 µg/L |
| 31 | Lost Lake | St. Louis | B | 5.8 ft | 17 µg/L | 6.7 µg/L |
| 32 | Peary Lake | St. Louis | B | 6.7 ft | 20.5 µg/L | - |
| 33 | Twin Lake | St. Louis | B | 3.6 ft | 13 µg/L | - |
| 34 | Ek Lake | St. Louis | B | 6.3 ft | 19.6 µg/L | - |
| 35 | Murphy Lake | St. Louis | B | 5.2 ft | 18 µg/L | - |
| 36 | Shoepack Lake | St. Louis | B | 4.6 ft | 19.8 µg/L | - |
| 37 | Simian Lake | St. Louis | C | 3.9 ft | 25 µg/L | 5.5 µg/L |
| 38 | Birch Lake | St. Louis | C | 3.9 ft | 21 µg/L | - |
| 39 | Unnamed Lake | St. Louis | C | 4.8 ft | 27 µg/L | - |
| 40 | Colby Lake | St. Louis | C | 3.5 ft | 22 µg/L | - |
| 41 | Wolf Lake | St. Louis | C | 6.6 ft | 20 µg/L | - |
| 42 | Elliot Lake | St. Louis | C | 6.2 ft | 20.5 µg/L | - |
| 43 | Cedar Island Lake | St. Louis | C | 3.8 ft | 21 µg/L | - |
| 44 | Little Sturgeon Lake | St. Louis | C | 4.8 ft | 21 µg/L | - |
| 45 | Nichols Lake | St. Louis | C | 5.1 ft | 20.5 µg/L | - |
| 46 | Heikkilla Lake | St. Louis | C | 5 ft | 27.5 µg/L | - |
| 47 | Leora Lake | St. Louis | C | 7 ft | 46 µg/L | - |
| 48 | W Two Rivers Reservoir | St. Louis | C | 6.4 ft | 28 µg/L | - |
| 49 | Bog Lake | St. Louis | C | 3.3 ft | 14 µg/L | - |
| 50 | Trease Lake | St. Louis | C | 4.7 ft | 29 µg/L | - |