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LakeQuality

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. 38 hypereutrophic lakes are on the Kansas 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
1Milford LakeClay1.6 ft-78
2Perry LakeJefferson3.1 ft-65
3Marion LakeMarion2 ft-72
4Marion Co LakeMarion2.9 ft-66
5Lake AftonSedgwick1.7 ft-74
6Miami Co State Fishing LakeMiami2 ft-69
7Gardner LakeJohnson2.3 ft-63
8Wellington New City LakeSumner1.9 ft-66
9Harvey Co West Park LakeHarvey1.4 ft-74
10Anthony City LakeHarper0.4 ft-79
11Webster LakeRooks3.2 ft-61
12Hiawatha City LakeBrown2.1 ft-72
13Augusta City LakeButler1.5 ft-73
14Veteran'S LakeBarton2.3 ft-67
15Atchison Co State Fishing LakeAtchison2.8 ft-63
16Lake WarnockAtchison1.7 ft-82
17Cedar LakeJohnson1.6 ft-70
18Ellis City LakeEllis0.7 ft-89
19Neosho Wildlife Area LakeNeosho1.7 ft-72
20Lovewell LakeJewell1.3 ft-76
21Augusta Santa Fe LakeButler1 ft-75
22Pomona LakeOsage2.9 ft-64
23Norton LakeNorton2 ft-70
24Jamestown Wildlife Area LakeCloud0.4 ft-87
25Cheyenne Bottoms PoolBarton0.4 ft-87
26Quivera Little Salt Marsh LakeStafford0.9 ft-79
27Sheridan Co State Fishing LakeSheridan1.1 ft-71
28Chanute Santa Fe LakeNeosho1.8 ft-75
29Central Park LakeShawnee1.2 ft-80
30Kingston Lake ParkJohnson--72
31Sar Ko Park LakeJohnson--69
32Tomahawk Creek Park LakeJohnson--73
33South LakeJohnson--76
34Pierson LakeWyandotte--67
35Leawood Park LakeJohnson--81
36Water Works Park LakeJohnson--74
37Big Eleven LakeWyandotte--71
38Antioch Park LakeJohnson--80

Source: EPA National Aquatic Resource Surveys, 2026.