Kansas
Toxic algae in Jackson County lakes
2 lakes and waterways in Jackson County have harmful algal bloom reports in Kansas's official data. The most recent entry is for Elkhorn Lake: Kansas has a public health watch in effect for Elkhorn Lake, last updated on 16 October 2026. The latest published sample, on 12 October 2026 at Elk Horn Lake, was at Watch level (microcystin 0.38 µg/L, 212,516 cyanobacteria cells/mL). Elkhorn Lake has 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.
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.
- Banner Creek Lake 2012
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.