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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 overwhelmingly grade D or F — the trophic class and the grade are measuring closely-related dimensions of the same underlying nutrient regime.

#LakeCountyGradeClarityDepthTSI
1Milford LakeClayF1.6 ft-78
2Perry LakeJeffersonF3.1 ft-65
3Marion LakeMarionF2 ft-72
4Marion Co LakeMarionF2.9 ft-66
5Lake AftonSedgwickF1.7 ft-74
6Miami Co State Fishing LakeMiamiF2 ft-69
7Gardner LakeJohnsonF2.3 ft-63
8Wellington New City LakeSumnerF1.9 ft-66
9Harvey Co West Park LakeHarveyF1.4 ft-74
10Anthony City LakeHarperF0.4 ft-79
11Webster LakeRooksF3.2 ft-61
12Hiawatha City LakeBrownF2.1 ft-72
13Augusta City LakeButlerF1.5 ft-73
14Veteran'S LakeBartonF2.3 ft-67
15Atchison Co State Fishing LakeAtchisonF2.8 ft-63
16Lake WarnockAtchisonF1.7 ft-82
17Cedar LakeJohnsonF1.6 ft-70
18Ellis City LakeEllisF0.7 ft-89
19Neosho Wildlife Area LakeNeoshoF1.7 ft-72
20Lovewell LakeJewellF1.3 ft-76
21Augusta Santa Fe LakeButlerF1 ft-75
22Pomona LakeOsageF2.9 ft-64
23Norton LakeNortonF2 ft-70
24Jamestown Wildlife Area LakeCloudF0.4 ft-87
25Cheyenne Bottoms PoolBartonF0.4 ft-87
26Quivera Little Salt Marsh LakeStaffordF0.9 ft-79
27Sheridan Co State Fishing LakeSheridanF1.1 ft-71
28Chanute Santa Fe LakeNeoshoF1.8 ft-75
29Central Park LakeShawneeF1.2 ft-80
30Kingston Lake ParkJohnsonF--72
31Sar Ko Park LakeJohnsonF--69
32Tomahawk Creek Park LakeJohnsonF--73
33South LakeJohnsonF--76
34Pierson LakeWyandotteF--67
35Leawood Park LakeJohnsonF--81
36Water Works Park LakeJohnsonF--74
37Big Eleven LakeWyandotteF--71
38Antioch Park LakeJohnsonF--80

Source: EPA National Aquatic Resource Surveys, 2026.