Emery County Lake Quality
Utah, 14 lakes, average grade B (Good)
Emery County has 14 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. With an average grade of B, Emery 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. Cleveland Lake (A) is the cleanest in the county.
Quick Answers for Emery County
Planning a trip? Check special fishing regulations for Cleveland Lake — or check the official Utah fishing regulations.
All Lakes in Emery County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Cleveland Lake | A | 17.4 ft | - |
| 2 | Millsite Reservoir | A | 10.5 ft | - |
| 3 | Electric Lake | A | 10.8 ft | - |
| 4 | Joes Valley Reservoir | A | 11.2 ft | - |
| 5 | Miller Flat Reservoir | A | 10.2 ft | - |
| 6 | Electric L Midway Lake | B | 7.9 ft | - |
| 7 | Nla Lake | B | 4.8 ft | - |
| 8 | Nla Lake | C | 3.3 ft | - |
Other Counties in Utah
See how Emery 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 Emery County
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Source: EPA National Aquatic Resource Surveys, 2026.