Salt Lake County Lake Quality
Utah, 10 lakes, average grade A (Excellent)
Salt Lake County has 10 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. The county's average grade is A — among the cleanest in {{stateName}}. 8 lakes pull an A on their own, and almost none fall into the D or F brackets.
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 Nla Lake (F).
Quick Answers for Salt Lake County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Utah fishing regulations.
All Lakes in Salt Lake County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | A | 20.4 ft | - |
| 2 | Lake Mary | A | 26.9 ft | - |
| 3 | Clean Lakes Equipment Blank | A | - | - |
| 4 | Clean Lakes Equipment Blank Vertigrator | A | - | - |
| 5 | Equipment Blank-Bear Lake And Tributaires Lake Blank | A | - | - |
| 6 | Equipment Blank-Utah Lake | A | - | - |
| 7 | Bureau of Reclamation Flaming Gorge Qaqc Blank Lake | A | - | - |
| 8 | Little Dell Reservoir | A | 14.8 ft | - |
| 9 | Nla Lake | F | 0.7 ft | - |
Other Counties in Utah
See how Salt Lake 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 Salt Lake County
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Source: EPA National Aquatic Resource Surveys, 2026.