Morgan County Lake Quality
Utah, 9 lakes, average grade B (Good)
Only 9 lakes in Morgan 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. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lost Creek Reservoir Emap (A); the most-stressed is Lost Creek Reservoir (B).
Quick Answers for Morgan County
Planning a trip? Check special fishing regulations for Lost Creek Reservoir Emap — or check the official Utah fishing regulations.
All Lakes in Morgan County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lost Creek Reservoir Emap | A | 15.7 ft | - |
| 2 | East Canyon Reservoir | A | 13.8 ft | - |
| 3 | Nla Lake | B | 14 ft | - |
| 4 | Lost Creek Reservoir Midway | B | 8.4 ft | - |
| 5 | Lost Creek Reservoir | B | 9.2 ft | - |
Other Counties in Utah
See how Morgan 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 Morgan County
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Source: EPA National Aquatic Resource Surveys, 2026.