Garfield County Lake Quality
Utah, 13 lakes, average grade B (Good)
Only 13 lakes in Garfield 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. With an average grade of B, Garfield County sits comfortably above the {{stateName}} median.
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 Nla Lake (A); the most-stressed is Lake Powell Goodhope Bay Midchannel (D).
Quick Answers for Garfield County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Utah fishing regulations.
All Lakes in Garfield County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | A | - | - |
| 2 | Posey Lake | A | 16.4 ft | - |
| 3 | Wide Hollow Reservoir | A | 13.8 ft | - |
| 4 | Tropic Reservoir | A | 12.3 ft | - |
| 5 | Lower Bowns Reservoir | B | 9.2 ft | - |
| 6 | Nla Lake | B | 5.6 ft | - |
| 7 | Nla Lake | C | 10.9 ft | - |
| 8 | Lake Powell Goodhope Bay Midchannel | D | 6.1 ft | - |
| 9 | Panguitch Lake | D | 1.5 ft | - |
| 10 | Panguitch Lake | D | 1.5 ft | - |
| 11 | Panguitch L Shore Lake | D | 5.7 ft | - |
Other Counties in Utah
See how Garfield 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 Garfield County
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Source: EPA National Aquatic Resource Surveys, 2026.