Cleanest Lakes in Grand County, Colorado
Lake Granby in Grand County leads the rankings with a water quality grade of A and 12.7 ft of clarity. Below are the top 6 cleanest monitored lakes in Grand County, Colorado, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Lake Granby | Grand | A | 12.7 ft | 17 µg/L | 1.7 µg/L |
| 2 | Wolford Mountain Reservoir | Grand | B | 8.3 ft | 10 µg/L | 1.9 µg/L |
| 3 | Grand Lake | Grand | B | 8.9 ft | 14 µg/L | 2.7 µg/L |
| 4 | Windy Gap Reservoir | Grand | B | - | 52.5 µg/L | 3 µg/L |
| 5 | Shadow Mountain Lake | Grand | B | 7.8 ft | 20 µg/L | 5.1 µg/L |
| 6 | Willow Creek Reservoir | Grand | C | 3.9 ft | 87.5 µg/L | 2.4 µg/L |