Cleanest Lakes in South Dakota
Traverse Lake in Roberts County leads the rankings with a water quality grade of D and 3.9 ft of clarity. Below are the top 2 cleanest monitored lakes in South Dakota, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Traverse Lake | Roberts | D | 3.9 ft | 173 µg/L | - |
| 2 | Big Stone Lake | Roberts | F | 3 ft | 108.5 µg/L | - |