
Updated August 2026
The State of Arkansas's Lakes 2026
Of 113 lakes in Arkansas, 9.4% earn a water-quality grade of A or B and 62.5% score D or F (average grade D). Beaver Lake is the cleanest; 21 lakes (18.6%) are on an official impaired-waters list.
Data Report
113
Monitored lakes graded
D
Average grade
9.4%
Grade A or B
18.6%
On impaired list
Arkansas grade distribution
A
C
D
F
A: 5 (7.8%)B: 1 (1.6%)C: 18 (28.1%)D: 15 (23.4%)F: 25 (39.1%)
Cleanest lakes in Arkansas
Highest combined water-quality score, 2026.
- 1.ABeaver Lake — Carroll County20.3 ft clarity · 5 µg/L P · 1 µg/L chl-a
- 2.ALake Winona — Saline County7.2 ft clarity · 11 µg/L P · 2 µg/L chl-a
- 3.CBeaver Lake — Benton County4.6 ft clarity · 23 µg/L P · 9 µg/L chl-a
- 4.CCrown Lake — Izard County20 µg/L P · 2 µg/L chl-a
- 5.CDriver Creek Lake — Van Buren County27 µg/L P · 13 µg/L chl-a
- 6.CLake Leatherwood — Carroll County26 µg/L P · 3 µg/L chl-a
- 7.DBobb Kidd Lake — Washington County43 µg/L P · 23 µg/L chl-a
- 8.DLake Wilson — Washington County20 µg/L P · 7 µg/L chl-a
- 9.DHorsehead Lake — Johnson County30 µg/L P · 14 µg/L chl-a
- 10.DLee Creek Lake — Crawford County30 µg/L P · 10 µg/L chl-a
Most-polluted lakes
Lowest combined water-quality score among monitored lakes.
- 1.FLake Beulah — Desha County1.0 ft clarity · 300 µg/L P · 69 µg/L chl-a
- 2.FDesoto Lake — Phillips County1.6 ft clarity · 75 µg/L P · 44 µg/L chl-a
- 3.FTunica Cutoff Lake — Lee County1.6 ft clarity · 150 µg/L P · 56 µg/L chl-a
- 4.FLake Charles — Lawrence County70 µg/L P · 41 µg/L chl-a
- 5.FLake Erling — Lafayette County50 µg/L P · 49 µg/L chl-a
- 6.FBois D Arc Lake — Hempstead County200 µg/L P · 137 µg/L chl-a
- 7.DBobb Kidd Lake — Washington County43 µg/L P · 23 µg/L chl-a
- 8.DLake Wilson — Washington County20 µg/L P · 7 µg/L chl-a
- 9.DHorsehead Lake — Johnson County30 µg/L P · 14 µg/L chl-a
- 10.DLee Creek Lake — Crawford County30 µg/L P · 10 µg/L chl-a
Worst algae hotspots
Highest measured chlorophyll-a (algae) concentration.
- 1.FBois D Arc Lake — Hempstead County137 µg/L chlorophyll-a
- 2.FGrand Lake — Chicot County116 µg/L chlorophyll-a
- 3.FLake Hogue — Poinsett County114 µg/L chlorophyll-a
- 4.FLake June — Lafayette County100 µg/L chlorophyll-a
- 5.FLake Pine Bluff Diagonally From North And East Levees — Jefferson County84 µg/L chlorophyll-a
- 6.FLake Conway — Faulkner County76 µg/L chlorophyll-a
- 7.FHorseshoe Lake — Crittenden County73 µg/L chlorophyll-a
- 8.FLake Wallace — Chicot County73 µg/L chlorophyll-a
- 9.FLake Beulah — Desha County69 µg/L chlorophyll-a
- 10.FLower Lake Chicot — Chicot County59 µg/L chlorophyll-a
Trending lakes
Improving
- 1.ABeaver Lake — Carroll County
- 2.AGreers Ferry Lake — Cleburne County
- 3.ALake Winona — Saline County
- 4.CDriver Creek Lake — Van Buren County
- 5.CLake Leatherwood — Carroll County
- 6.CLake Austelle — Cross County
- 7.CDes Arc Lake — Prairie County
- 8.CLake Columbia — Columbia County
Declining
- 1.FDesoto Lake — Phillips County
- 2.FLake Charles — Lawrence County
- 3.FLower Lake Chicot — Chicot County
- 4.FBois D Arc Lake — Hempstead County
- 5.FLake June — Lafayette County
- 6.FLake Hogue — Poinsett County
- 7.FLake Pine Bluff Diagonally From North And East Levees — Jefferson County
- 8.FCrystal Lake — Benton County
Impaired waters in Arkansas
21 lakes appear on the EPA/state 303(d) impaired-waters list (15 formally listed, 12 with a cleanup plan/TMDL).
Mercury · 8pH / acidity · 6Turbidity · 3Nutrients (phosphorus, nitrogen) · 3Algal growth · 1Oxygen depletion (low DO) · 1Metals (other than mercury) · 1PCBs · 1
Explore Arkansas lakes
Grades combine total phosphorus, total nitrogen, chlorophyll-a, and turbidity from the EPA Water Quality Portal and state agencies. See the full methodology, the national State of America’s Lakes report, or all Arkansas lakes.
Cite this report: LakeQuality, “The State of Arkansas's Lakes 2026”.