
Cleanest Lakes in Grand County, Colorado
Willow Creek Reservoir in Grand County leads the rankings on measured clarity and nutrients and 3.9 ft of clarity. Below are the top 24 cleanest monitored lakes in Grand County, Colorado, ranked on EPA nutrient and algae measurements.
Ranked List
| # | Lake | County | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|
| 1 | Willow Creek Reservoir | Grand | 3.9 ft | 75.5 µg/L | 2.4 µg/L |
| 2 | Wolford Mountain Reservoir | Grand | 7.5 ft | 13 µg/L | 2 µg/L |
| 3 | Grand Lake | Grand | 8.7 ft | 14 µg/L | 2.7 µg/L |
| 4 | Shadow Mountain Lake | Grand | 7.9 ft | 20 µg/L | 5.1 µg/L |
| 5 | Windy Gap Reservoir | Grand | - | 52 µg/L | 3 µg/L |
| 6 | Little King Ranch Reservoir | Grand | - | - | - |
| 7 | Windy Gap Reservoir | Grand | - | - | - |
| 8 | Monarch Lake | Grand | - | - | - |
| 9 | Columbine Lake | Grand | - | - | - |
| 10 | Lake Verna | Grand | - | - | - |
| 11 | Lake Nanita | Grand | - | - | - |
| 12 | Crater Lake | Grand | - | - | - |
| 13 | Meadow Creek Reservoir | Grand | - | - | - |
| 14 | East Branch Reservoir | Grand | - | - | - |
| 15 | Sylvan Reservoir | Grand | - | - | - |
| 16 | Williams Fork Reservoir | Grand | - | - | - |
| 17 | Binco Reservoir | Grand | - | - | - |
| 18 | Red Dirt Reservoir | Grand | - | - | - |
| 19 | Hinman Reservoir | Grand | - | - | - |
| 20 | Wolford Mountain Reservoir | Grand | - | - | - |
| 21 | Matheson Reservoir | Grand | - | - | - |
| 22 | Dumont Lake | Grand | - | - | - |
| 23 | Whiteley Peak Reservoir | Grand | - | - | - |
| 24 | Lake Agnes | Grand | - | - | - |
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