Kansas
Toxic algae in Leavenworth County lakes
1 lake or waterway in Leavenworth County has harmful algal bloom reports in Kansas's official data. The most recent entry is for Lake Jeanette: Kansas has no current advisory for Lake Jeanette. The most recent sample, on 25 October 2021, was at Warning level (microcystin 0.2 µg/L, 543,670 cyanobacteria cells/mL).
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.