Uinta County Lake Quality
Wyoming, 7 lakes, average grade C (Fair)
Uinta County has 7 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. Uinta County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
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. Piedmont Reservoir D (B) is the cleanest in the county.
Quick Answers for Uinta County
Planning a trip? Check special fishing regulations for Piedmont Reservoir D — or check the official Wyoming fishing regulations.
All Lakes in Uinta County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Piedmont Reservoir D | B | - | 26.2 µg/L |
| 2 | Nla Lake | C | 7 ft | 25509.3 µg/L |
| 3 | Rollins Reservoir | C | 6.2 ft | 20.8 µg/L |
| 4 | Sulphur Creek Reservoir | C | 3.1 ft | 14.2 µg/L |
| 5 | Crompton Reservoir D | C | - | 46.1 µg/L |
| 6 | Graham Reservoir | C | 2.4 ft | 20.4 µg/L |
| 7 | Woodruff Narrows Reservoir | F | 0.9 ft | 92 µg/L |
Other Counties in Wyoming
See how Uinta County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
Where to stay near Uinta County
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Source: EPA National Aquatic Resource Surveys, 2026.