Kansas
Toxic algae in Sedgwick County lakes
13 lakes and waterways in Sedgwick County have harmful algal bloom reports in Kansas's official data. The most recent entry is for Lake Afton: Kansas has a public health warning in effect for Lake Afton, last updated on 2 October 2026. The latest published sample, on 28 September 2026 at Lake Afton Boat Ramp, was at Warning level (microcystin 2.86 µg/L, 711,518 cyanobacteria cells/mL). Lake Afton, Colwich City Lake and Chisholm Creek Park Lake have had blooms in three or more years.
Lakes with bloom history
Newest report first. Each lake has its own page with the full history and what the results mean.
- Lake Afton Public health warning
- Chisholm Ridge Ponds No current advisory
- Colwich City Lake No current advisory
- Eagle Lake No current advisory
- Woodland Park Pond Mount Hope No current advisory
- Riggs Park Lake No current advisory
- McLaughin Lake No current advisory
- Chisholm Creek Park Lake No current advisory
Other waterbodies with a report
These have one or two reports in a single year, which isn't enough history for a page of their own yet.
- Camp Hyde Lake 2011
- Cedar Brook Pond 2014
- Dorner Park Lake 2023
- Tallwood Drive Lake 2014
- Windmill Lake 2014
Source: Kansas Department of Health and Environment (KDHE), official data, checked 24 October 2026. For today's conditions see the KDHE algae bloom map. No report doesn't mean a lake is safe: most water is only tested occasionally.