Beaver County Lake Quality
Utah, 11 lakes, average grade C (Fair)
Only 11 lakes in Beaver 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. Beaver 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. Minersville Reservoir Midway (B) is the cleanest in the county.
Quick Answers for Beaver County
Planning a trip? Check special fishing regulations for Minersville Reservoir Midway — or check the official Utah fishing regulations.
All Lakes in Beaver County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Minersville Reservoir Midway | B | 6.7 ft | - |
| 2 | Anderson Meadow Reservoir | B | 10.2 ft | - |
| 3 | Three Creeks Reservoir | B | 6.6 ft | - |
| 4 | Minersville Reservoir | C | 2.6 ft | - |
| 5 | Nla Lake | C | 3.7 ft | - |
Other Counties in Utah
See how Beaver 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 Beaver County
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Source: EPA National Aquatic Resource Surveys, 2026.