Rio Blanco County Lake Quality
Colorado, 5 lakes, average grade B (Good)
Only 5 lakes in Rio Blanco County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. With an average grade of B, Rio Blanco County sits comfortably above the {{stateName}} median.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Ned Wilson Lake (A) is the cleanest in the county.
Quick Answers for Rio Blanco County
Planning a trip? Check special fishing regulations for Ned Wilson Lake — or check the official Colorado fishing regulations.
All Lakes in Rio Blanco County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Ned Wilson Lake | A | - | 13.5 µg/L |
| 2 | Upper Ned Wilson Lake | C | - | 50 µg/L |
| 3 | Kenney Reservoir | D | 6 ft | - |
Other Counties in Colorado
See how Rio Blanco County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 12 states.
Where to stay near Rio Blanco County
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Source: EPA National Aquatic Resource Surveys, 2026.