Cleanest Lakes in Watonwan County, Minnesota
Long Lake in Watonwan County leads the rankings with a water quality grade of D and 2.5 ft of clarity. Below are the top 5 cleanest monitored lakes in Watonwan County, Minnesota, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Long Lake | Watonwan | D | 2.5 ft | 59 µg/L | - |
| 2 | St. James Lake | Watonwan | D | 3 ft | 51.5 µg/L | - |
| 3 | Fedji Lake | Watonwan | D | 3.3 ft | 45 µg/L | - |
| 4 | Unnamed Lake | Watonwan | F | 1 ft | 275 µg/L | - |
| 5 | Kansas Lake | Watonwan | F | 1.5 ft | 192 µg/L | - |