Kansas

Toxic algae in Riley County lakes

2 lakes and waterways in Riley County have harmful algal bloom reports in Kansas's official data. The most recent entry is for Jerry Dishman Lake: Kansas has no current advisory for Jerry Dishman Lake. The most recent sample, on 14 July 2026, was below advisory levels (microcystin not detected, 3,963 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.

Jerry Dishman Lake Latest 14 July 2026, blooms in 0 years No current advisory
Tuttle Creek Lake Latest 23 June 2025, blooms in 1 year No current advisory

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.