Kansas
Toxic algae in Marion County lakes
2 lakes and waterways in Marion County have harmful algal bloom reports in Kansas's official data. The most recent entry is for Marion County State Fishing Lake: Kansas has a public health warning in effect for Marion County State Fishing Lake, last updated on 9 October 2026. The latest published sample, on 5 October 2026 at Marion Co Lake Beach Area, was at Warning level (microcystin 2.33 µg/L, 380,709 cyanobacteria cells/mL). Marion County State Fishing Lake and Marion Reservoir 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.
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.