Kansas
Toxic algae in Cowley County lakes
3 lakes and waterways in Cowley County have harmful algal bloom reports in Kansas's official data. The most recent entry is for Winfield City Lake: Kansas has no current advisory for Winfield City Lake. The most recent sample, on 26 May 2026 at Winfield City Lake North Beach, was below advisory levels (microcystin not detected, 6,456 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.
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.
- Cowley County State Fishing Lake 2017
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.