Cleanest Lakes in Sherburne County, Minnesota
Big Lake in Sherburne County leads the rankings with a water quality grade of A and 13.6 ft of clarity. Below are the top 19 cleanest monitored lakes in Sherburne County, Minnesota, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Big Lake | Sherburne | A | 13.6 ft | 10.5 µg/L | - |
| 2 | Mitchell Lake | Sherburne | A | 10 ft | 14.5 µg/L | - |
| 3 | Sandy Lake | Sherburne | A | 14 ft | 12.5 µg/L | - |
| 4 | Ann Lake | Sherburne | A | 11.5 ft | 15.5 µg/L | - |
| 5 | Unnamed Lake | Sherburne | B | 13 ft | 22 µg/L | - |
| 6 | Pickerel Lake | Sherburne | B | 10.5 ft | 20 µg/L | - |
| 7 | West Hunter Lake | Sherburne | B | 10.2 ft | 24 µg/L | - |
| 8 | East Hunter Lake | Sherburne | B | 12.5 ft | 25 µg/L | - |
| 9 | Birch Lake | Sherburne | C | 5.8 ft | 21 µg/L | - |
| 10 | Unnamed Lake | Sherburne | C | 5.2 ft | 34 µg/L | - |
| 11 | Fremont Lake | Sherburne | D | 3 ft | 40 µg/L | - |
| 12 | Eagle Lake | Sherburne | D | 3 ft | 61.5 µg/L | - |
| 13 | Upper Orono Lake | Sherburne | D | 3.5 ft | 130.5 µg/L | - |
| 14 | Elk Lake | Sherburne | D | 2.5 ft | 77 µg/L | - |
| 15 | Briggs Lake | Sherburne | D | 3 ft | 75 µg/L | - |
| 16 | Julia Lake | Sherburne | D | 2 ft | 80 µg/L | - |
| 17 | Elk Lake | Sherburne | F | 2 ft | 100 µg/L | - |
| 18 | Rush Lake | Sherburne | F | 2 ft | 115 µg/L | - |
| 19 | Lower Orono Lake | Sherburne | F | 2.5 ft | 156 µg/L | - |