Grant County Lake Quality
Arkansas, 2 lakes, average grade D (Poor)
Only 2 lakes in Grant 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 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 Cox Creek Lake (C); the most-stressed is Cox Creek Lake (F).
Quick Answers for Grant County
Planning a trip? Check special fishing regulations for Cox Creek Lake — or check the official Arkansas fishing regulations.
All Lakes in Grant County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Cox Creek Lake | C | - | 30 µg/L |
| 2 | Cox Creek Lake | F | 1 ft | - |
Other Counties in Arkansas
See how Grant County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
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Source: EPA National Aquatic Resource Surveys, 2026.