Millard County Lake Quality
Utah, 3 lakes, average grade C (Fair)
Millard County has 3 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. Millard 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. Dmad Reservoir (C) is the cleanest in the county.
Quick Answers for Millard County
Planning a trip? Check special fishing regulations for Dmad Reservoir — or check the official Utah fishing regulations.
All Lakes in Millard County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Dmad Reservoir | C | 0.7 ft | - |
| 2 | Dmad Reservoir N of Cut | C | 0.7 ft | - |
| 3 | Gunnison Bend Reservoir | C | 1.5 ft | - |
Other Counties in Utah
See how Millard 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 Millard County
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Source: EPA National Aquatic Resource Surveys, 2026.