Kansas

Toxic algae in Linn County lakes

3 lakes and waterways in Linn County have harmful algal bloom reports in Kansas's official data. The most recent entry is for Linn Valley Lake: Kansas has no current advisory for Linn Valley Lake. The most recent sample, on 19 July 2021, was below advisory levels (microcystin not detected).

Lakes with bloom history

Newest report first. Each lake has its own page with the full history and what the results mean.

Linn Valley Lake Latest 19 July 2021, blooms in 2 years No current advisory
La Cygne Lake Latest 9 September 2019, blooms in 1 year No current advisory

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.

Prescott City Lake 2025

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.