Skip to main content
LakeQuality

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. 1.ABeaver LakeCarroll County20.3 ft clarity · 5 µg/L P · 1 µg/L chl-a
  2. 2.ALake WinonaSaline County7.2 ft clarity · 11 µg/L P · 2 µg/L chl-a
  3. 3.CBeaver LakeBenton County4.6 ft clarity · 23 µg/L P · 9 µg/L chl-a
  4. 4.CCrown LakeIzard County20 µg/L P · 2 µg/L chl-a
  5. 5.CDriver Creek LakeVan Buren County27 µg/L P · 13 µg/L chl-a
  6. 6.CLake LeatherwoodCarroll County26 µg/L P · 3 µg/L chl-a
  7. 7.DBobb Kidd LakeWashington County43 µg/L P · 23 µg/L chl-a
  8. 8.DLake WilsonWashington County20 µg/L P · 7 µg/L chl-a
  9. 9.DHorsehead LakeJohnson County30 µg/L P · 14 µg/L chl-a
  10. 10.DLee Creek LakeCrawford County30 µg/L P · 10 µg/L chl-a

Most-polluted lakes

Lowest combined water-quality score among monitored lakes.

  1. 1.FLake BeulahDesha County1.0 ft clarity · 300 µg/L P · 69 µg/L chl-a
  2. 2.FDesoto LakePhillips County1.6 ft clarity · 75 µg/L P · 44 µg/L chl-a
  3. 3.FTunica Cutoff LakeLee County1.6 ft clarity · 150 µg/L P · 56 µg/L chl-a
  4. 4.FLake CharlesLawrence County70 µg/L P · 41 µg/L chl-a
  5. 5.FLake ErlingLafayette County50 µg/L P · 49 µg/L chl-a
  6. 6.FBois D Arc LakeHempstead County200 µg/L P · 137 µg/L chl-a
  7. 7.DBobb Kidd LakeWashington County43 µg/L P · 23 µg/L chl-a
  8. 8.DLake WilsonWashington County20 µg/L P · 7 µg/L chl-a
  9. 9.DHorsehead LakeJohnson County30 µg/L P · 14 µg/L chl-a
  10. 10.DLee Creek LakeCrawford County30 µg/L P · 10 µg/L chl-a

Worst algae hotspots

Highest measured chlorophyll-a (algae) concentration.

  1. 1.FBois D Arc LakeHempstead County137 µg/L chlorophyll-a
  2. 2.FGrand LakeChicot County116 µg/L chlorophyll-a
  3. 3.FLake HoguePoinsett County114 µg/L chlorophyll-a
  4. 4.FLake JuneLafayette County100 µg/L chlorophyll-a
  5. 5.FLake Pine Bluff Diagonally From North And East LeveesJefferson County84 µg/L chlorophyll-a
  6. 6.FLake ConwayFaulkner County76 µg/L chlorophyll-a
  7. 7.FHorseshoe LakeCrittenden County73 µg/L chlorophyll-a
  8. 8.FLake WallaceChicot County73 µg/L chlorophyll-a
  9. 9.FLake BeulahDesha County69 µg/L chlorophyll-a
  10. 10.FLower Lake ChicotChicot County59 µg/L chlorophyll-a

Trending lakes

Improving

  1. 1.ABeaver LakeCarroll County
  2. 2.AGreers Ferry LakeCleburne County
  3. 3.ALake WinonaSaline County
  4. 4.CDriver Creek LakeVan Buren County
  5. 5.CLake LeatherwoodCarroll County
  6. 6.CLake AustelleCross County
  7. 7.CDes Arc LakePrairie County
  8. 8.CLake ColumbiaColumbia County

Declining

  1. 1.FDesoto LakePhillips County
  2. 2.FLake CharlesLawrence County
  3. 3.FLower Lake ChicotChicot County
  4. 4.FBois D Arc LakeHempstead County
  5. 5.FLake JuneLafayette County
  6. 6.FLake HoguePoinsett County
  7. 7.FLake Pine Bluff Diagonally From North And East LeveesJefferson County
  8. 8.FCrystal LakeBenton 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

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”.