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LakeQuality
A storm cloud deck moving over Slim Lake at dusk, the last light breaking through low on the horizon

Hypereutrophic Lakes in Arkansas

25 hypereutrophic lakes in Arkansas. Very high nutrients, dense algae, poor clarity.

Hypereutrophic lakes (TSI above 70) are at the upper end of the productivity scale: visible algal blooms most weeks of summer, clarity often under 3 feet, and meaningful risk of harmful-algal-bloom toxin events. 25 hypereutrophic lakes are on the Arkansas books. Almost none of them are deep — 0% break 50 feet. Shallow basin plus heavy nutrient input is the consistent recipe.

Hypereutrophic lakes carry the highest phosphorus and chlorophyll-a readings on record; the trophic class and the readings are measuring closely related dimensions of the same underlying nutrient regime.

#LakeCountyClarityDepthTSI
1Lake BeulahDesha1 ft-79
2Desoto LakePhillips1.6 ft-68
3Tunica Cutoff LakeLee1.6 ft-72
4Siloam Springs LakeBenton--65
5Lincoln LakeWashington--64
6Lake CharlesLawrence--66
7Lake WilsonAshley--75
8Lake AtkinsPope--67
9Lake ErlingLafayette--65
10Lower Lake ChicotChicot--74
11Overcup LakeConway--66
12Harris Break LakePerry--61
13Lake ConwayFaulkner--71
14Lake Jack NolanSebastian--60
15Horseshoe LakeCrittenden--70
16Bois D Arc LakeHempstead--80
17Lake JuneLafayette--77
18Lake HoguePoinsett--79
19Grand LakeChicot--82
20Lake Pine Bluff Diagonally From North And East LeveesJefferson--75
21Bear Creek LakeLee--65
22Lake WallaceChicot--75
23Crystal LakeBenton--61
24Tri County LakeCalhoun--66
25Storm Creek LakePhillips--62
All hypereutrophic lakes →Minnesota version →Wisconsin version →Illinois version →Michigan version →Iowa version →Ohio version →Pennsylvania version →New York version →Missouri version →Indiana version →North Dakota version →South Dakota version →Florida version →Colorado version →North Carolina version →Vermont version →Texas version →Oregon version →Oklahoma version →Kansas version →Nebraska version →Nevada version →Arizona version →Idaho version →Montana version →New Mexico version →Tennessee version →Alabama version →Virginia version →Kentucky version →Utah version →Washington version →Wyoming version →Georgia version →Massachusetts version →Ontario version →Québec version →Nova Scotia version →British Columbia version →Newfoundland and Labrador version →All Arkansas lakes →

Source: EPA National Aquatic Resource Surveys, 2026.