Cleanest Lakes in Washington County, Utah
Quail Creek Reservoir in Washington County leads the rankings with a water quality grade of A and 14.6 ft of clarity. Below are the top 8 cleanest monitored lakes in Washington County, Utah, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Quail Creek Reservoir | Washington | A | 14.6 ft | - | 0.9 µg/L |
| 2 | Kolob Reservoir | Washington | A | 10.5 ft | - | 1.8 µg/L |
| 3 | Nla Lake | Washington | B | 7.9 ft | - | 2.5 µg/L |
| 4 | Kolob Reservoir Midway | Washington | B | 9.5 ft | - | 1.5 µg/L |
| 5 | Upper Enterprise Reservoir | Washington | B | 5.2 ft | - | 3.1 µg/L |
| 6 | Gunlock Reservoir | Washington | B | 4.6 ft | - | 2.9 µg/L |
| 7 | Gunlock Reservoir Midway | Washington | B | 4.6 ft | - | 4.5 µg/L |
| 8 | Baker Dam Reservoir | Washington | D | 3.6 ft | - | 29.5 µg/L |