Kansas

Toxic algae in Sumner County lakes

2 lakes and waterways in Sumner County have harmful algal bloom reports in Kansas's official data. The most recent entry is for Wellington Lake: Kansas has no current advisory for Wellington Lake. The most recent sample, on 29 June 2026 at Old Wellington Lake, Dock/Intake, 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.

Wellington Lake Latest 29 June 2026, blooms in 2 years No current advisory
Hargis Lake Latest 16 August 2021, 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.