Washington County Lake Quality
Arkansas, 11 lakes, average grade C (Fair)
Washington County has 11 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. Washington County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Lake Weddington (B) is the cleanest in the county.
Quick Answers for Washington County
Planning a trip? Check special fishing regulations for Lake Weddington — or check the official Arkansas fishing regulations.
All Lakes in Washington County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Weddington | B | - | 23 µg/L |
| 2 | Lake Wilson | B | - | 20 µg/L |
| 3 | Beaver Lake | C | 9.4 ft | - |
| 4 | Lake Wilson | C | 8 ft | - |
| 5 | Lake Elmdale | C | - | 36 µg/L |
| 6 | Bobb Kidd Lake | C | - | 51.5 µg/L |
| 7 | Lake Sequoyah | C | - | 40 µg/L |
| 8 | Lincoln Lake | D | - | 50 µg/L |
| 9 | Lake Fayetteville | D | - | 40.5 µg/L |
| 10 | Lake Sequoyah | F | 2.5 ft | - |
| 11 | Lake Fayetteville | F | 2.6 ft | - |
Other Counties in Arkansas
See how Washington 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 Washington County
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Source: EPA National Aquatic Resource Surveys, 2026.