The State of Kansas's Lakes 2026

Cleanest lakes in Kansas

Cleanest combined nutrient and algae readings, 2026.

1. 1.Hillsdale Lake — Miami County3.7 ft clarity · 29 µg/L P · 17 µg/L chl-a
2. 2.Lenexa Lake — Johnson County29 µg/L P · 16 µg/L chl-a
3. 3.Cheney Lake — Sedgwick County2.5 ft clarity · 100 µg/L P · 19 µg/L chl-a
4. 4.Stoll Park Lake — Johnson County70 µg/L P · 22 µg/L chl-a
5. 5.Milford Lake — Clay County1.6 ft clarity · 610 µg/L P · 35 µg/L chl-a
6. 6.Perry Lake — Jefferson County3.1 ft clarity · 77 µg/L P · 37 µg/L chl-a
7. 7.Marion Lake — Marion County2.0 ft clarity · 230 µg/L P · 36 µg/L chl-a
8. 8.Cedar Lake — Johnson County1.6 ft clarity · 113 µg/L P · 40 µg/L chl-a
9. 9.Kingston Lake Park — Johnson County130 µg/L P · 59 µg/L chl-a
10. 10.Sar Ko Park Lake — Johnson County87 µg/L P · 52 µg/L chl-a

Highest measured algae

Highest measured chlorophyll-a (algae) concentration.

1. 1.Marais des Cygnes Wildlife Area Lake — Linn County454 µg/L chlorophyll-a
2. 2.Marais des Cygnes Nwr Lake — Linn County255 µg/L chlorophyll-a
3. 3.Ellis City Lake — Ellis County250 µg/L chlorophyll-a
4. 4.Lake Warnock — Atchison County219 µg/L chlorophyll-a
5. 5.Harvey Co East Lake — Harvey County205 µg/L chlorophyll-a
6. 6.Gathering Pond East — Geary County189 µg/L chlorophyll-a
7. 7.Cheyenne Bottoms Pool — Barton County174 µg/L chlorophyll-a
8. 8.Ogden City Lake — Riley County169 µg/L chlorophyll-a
9. 9.Garnett Lake — Anderson County160 µg/L chlorophyll-a
10. 10.Little Lake — Brown County155 µg/L chlorophyll-a

Trending lakes

Improving

1. 1.Geary Co State Fishing Lake — Geary County
2. 2.Lake Wabaunsee — Wabaunsee County
3. 3.Louisburg State Fishing Lake — Miami County
4. 4.New Olathe Lake — Johnson County
5. 5.Madison City Lake — Greenwood County
6. 6.Olathe Lake — Johnson County
7. 7.Clinton Lake — Douglas County
8. 8.Kanopolis Lake — Ellsworth County

Declining

1. 1.Milford Lake — Clay County
2. 2.Marion Co Lake — Marion County
3. 3.Lake Afton — Sedgwick County
4. 4.Miami Co State Fishing Lake — Miami County
5. 5.Gardner Lake — Johnson County
6. 6.Wellington New City Lake — Sumner County
7. 7.Harvey Co West Park Lake — Harvey County
8. 8.Anthony City Lake — Harper County