Cleanest Lakes in Sioux County, North Dakota
Froelich Dam Lake in Sioux County leads the rankings with a water quality grade of D and 3.9 ft of clarity. Below are the top 1 cleanest monitored lakes in Sioux County, North Dakota, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Froelich Dam Lake | Sioux | D | 3.9 ft | - | 37.5 µg/L |