Logan County Lake Quality
Arkansas, 3 lakes, average grade D (Poor)
Logan 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. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 1 lakes fall into the F bracket outright.
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 Cove Lake (C); the most-stressed is Blue Mountain Lake @ Ashley Creek (F).
Quick Answers for Logan County
Planning a trip? Check special fishing regulations for Cove Lake — or check the official Arkansas fishing regulations.
All Lakes in Logan County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Cove Lake | C | 3.5 ft | 43.5 µg/L |
| 2 | Cove Lake | D | 3.8 ft | - |
| 3 | Blue Mountain Lake @ Ashley Creek | F | 1.5 ft | 89 µg/L |
Other Counties in Arkansas
See how Logan 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 Logan County
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Source: EPA National Aquatic Resource Surveys, 2026.