Kansas
Toxic algae in Crawford County lakes
1 lake or waterway in Crawford County has harmful algal bloom reports in Kansas's official data. The most recent entry is for Frontenac City Lake: Kansas has no current advisory for Frontenac City Lake. The most recent sample, on 27 April 2026, was below advisory levels (microcystin not detected, 34,336 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.