Cleanest Lakes in Isanti County, Minnesota
Spectacle Lake in Isanti County leads the rankings with a water quality grade of A and 13.8 ft of clarity. Below are the top 17 cleanest monitored lakes in Isanti County, Minnesota, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Spectacle Lake | Isanti | A | 13.8 ft | 11 µg/L | - |
| 2 | Upper Birch Lake | Isanti | A | 10.8 ft | 9.5 µg/L | - |
| 3 | Lower Birch Lake | Isanti | B | 7.4 ft | 19 µg/L | - |
| 4 | Horseshoe Lake | Isanti | B | 3.5 ft | 13 µg/L | - |
| 5 | Hoffman Lake | Isanti | B | 3.7 ft | 15 µg/L | - |
| 6 | Horseleg Lake | Isanti | B | 3.6 ft | 17 µg/L | - |
| 7 | Blue Lake | Isanti | C | 8.9 ft | 44.5 µg/L | - |
| 8 | Fannie Lake | Isanti | C | 6.9 ft | 35 µg/L | - |
| 9 | Elms Lake | Isanti | C | 6.5 ft | 53 µg/L | - |
| 10 | Green Lake | Isanti | C | 4.7 ft | 48 µg/L | - |
| 11 | Skogman Lake | Isanti | C | 5.4 ft | 31 µg/L | - |
| 12 | Lory Lake | Isanti | C | 6 ft | 41 µg/L | - |
| 13 | Twin Lake | Isanti | D | 2.5 ft | 78 µg/L | - |
| 14 | Francis Lake | Isanti | D | 2 ft | 62 µg/L | - |
| 15 | Little Stanchfield Lake | Isanti | D | 3.5 ft | 132 µg/L | - |
| 16 | South Stanchfield Lake | Isanti | F | 2.5 ft | 119 µg/L | - |
| 17 | North Stanchfield Lake | Isanti | F | 2.8 ft | 171 µg/L | - |