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LakeQuality

A eutrophic lake is a productive ecosystem with the trade-offs that come with productivity: more food at the base of the food web, more clarity reduction by mid-summer, more dissolved-oxygen variability near the bottom. 53 Alabama lakes register as eutrophic. Only 0% are deep — eutrophy correlates with shallowness, agricultural watersheds, and the kind of nutrient-input history that takes decades to shift.

Eutrophic lakes typically grade C or D on our A–F scale. The same nutrient richness that defines the trophic class drives the lower grade.

#LakeCountyGradeClarityDepthTSI
1Warg LakeHaleB2.8 ft-56
2Olit LakeTuscaloosaB4.3 ft-51
3Ptac LakeCovingtonB3.6 ft-52
4Fjac LakeCovingtonB3.9 ft-50
5Gntc LakeCovingtonB3.7 ft-53
6Danw LakeDallasB3.1 ft-55
7Danw LakeWilcoxB2.9 ft-54
8Danw LakeWilcoxB2.9 ft-55
9Danw LakeDallasB3 ft-55
10Wdfa LakeMontgomeryB3.7 ft-53
11Wdfa LakeLowndesB3.3 ft-56
12Cofc LakeChoctawB2.4 ft-58
13Cofc LakeChoctawB1.9 ft-60
14Warg LakeHaleC2.1 ft-60
15Warg LakeTuscaloosaC2.4 ft-57
16Warg LakeHaleC2.4 ft-58
17Holt LakeTuscaloosaC4.5 ft-53
18Tenr LakeMarshallC5.1 ft-53
19Rlhr LakeRandolphC5 ft-53
20Jore LakeElmoreC5.7 ft-52
21Layc LakeShelbyC3.4 ft-56
22Wdfa LakeLowndesC3.3 ft-58
23Mitc LakeChiltonC5.4 ft-52
24Gaig LakeSumterC3 ft-56
25Gaig LakePickensC2.8 ft-58
26Gaig LakeGreeneC3.1 ft-56
27Dems LakeGreeneC2.4 ft-58
28Dems LakeSumterC2.7 ft-56
29Dems LakeGreeneC2.4 ft-57
30Cofc LakeMarengoC2 ft-60
31Alip LakePickensC2.4 ft-58
32Bant LakeWalkerD3.3 ft-57
33Purs LakeJeffersonD3.6 ft-55
34Weic LakeCherokeeD2.6 ft-59
35Weic LakeCherokeeD3.3 ft-58
36Holt LakeTuscaloosaD4.5 ft-54
37Holt LakeTuscaloosaD4.7 ft-53
38Tennessee River LakeJacksonD6.5 ft-53
39Tenr LakeLauderdaleD4.2 ft-56
40Logs LakeTalladegaD2.6 ft-59
41Layc LakeShelbyD3.7 ft-56
42Nees LakeSt. ClairD2.7 ft-60
43Nees LakeCherokeeD2.4 ft-61
44Ducc LakeCullmanD4.1 ft-57
45Turl LakeLawrenceD5 ft-55
46Ctmc LakeCullmanD5.4 ft-54
47Albd LakeDeKalbD6.5 ft-52
48Hilc LakeCalhounD3.8 ft-53
49Bwcd LakeDeKalbD4.3 ft-57
50Fncc LakeChambersD3.1 ft-54
51Ogll LakeLeeD4.1 ft-56
52Berw LakeWinstonD5 ft-55
53Butl LakeMarionD--57

Source: EPA National Aquatic Resource Surveys, 2026.