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LakeQuality

Eutrophic lakes — TSI 50 to 70 — are nutrient-rich and productive, with persistent summer algal communities that drive visible reductions in clarity. These conditions are not failures; they reflect a lake doing what nutrient-loaded waters do. 41 Kansas 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
1Lake CrawfordCrawfordB5.1 ft-52
2Geary Co State Fishing LakeGearyB4.3 ft-55
3Lake WabaunseeWabaunseeB4.9 ft-53
4Louisburg State Fishing LakeMiamiB3 ft-58
5New Olathe LakeJohnsonB3.4 ft-55
6Madison City LakeGreenwoodB4.1 ft-51
7Parsons LakeNeoshoB2 ft-65
8Bone Creek LakeCrawfordB5.8 ft-52
9Olathe LakeJohnsonC3 ft-59
10Hillsdale LakeMiamiC3.7 ft-56
11Cedar Bluff LakeTregoC5.9 ft-51
12Clinton LakeDouglasC3.8 ft-58
13Kanopolis LakeEllsworthC2.6 ft-61
14Leavenworth Co State Fishing LakeLeavenworthC4.3 ft-55
15Mission LakeBrownC1 ft-69
16El Dorado LakeButlerC2.8 ft-58
17Big Hill LakeLabetteC3.9 ft-55
18Pleasanton ReservoirLinnC4.3 ft-54
19Richmond City LakeFranklinC3.9 ft-56
20Lenexa LakeJohnsonC--55
21Cheney LakeSedgwickD2.5 ft-65
22Quivira LakeWyandotteD3 ft-61
23Potter'S LakeDouglasD4.4 ft-59
24Wilson Co State Fishing LakeWilsonD3.6 ft-57
25Tuttle Creek LakeRileyD2.9 ft-71
26Mound City LakeLinnD3.6 ft-60
27Horsethief Canyon LakeHodgemanD2.3 ft-63
28New Yates Center LakeWoodsonD5.2 ft-52
29Scott State Fishing LakeScottD3.1 ft-62
30Banner Creek LakeJacksonD2.9 ft-61
31Lone Star LakeDouglasD3.1 ft-60
32Council Grove LakeMorrisD1.7 ft-70
33Fall River LakeGreenwoodD1.9 ft-63
34Toronto LakeWoodsonD1 ft-70
35Elk City LakeMontgomeryD1.5 ft-67
36John Redmond LakeCoffeyD1.5 ft-73
37Quivera Big Salt Marsh LakeStaffordD0.8 ft-71
38Waconda LakeMitchellD3.3 ft-62
39Kirwin LakePhillipsD5.5 ft-58
40Strowbridge ReservoirOsageD2.4 ft-63
41Stoll Park LakeJohnsonD--63

Source: EPA National Aquatic Resource Surveys, 2026.