Harmful algal blooms (HABs) monitoring is concurrent with the water recreation season, April 1 through October 31. The public is encouraged to stay informed year-round because exposure through contact or ingestion can cause illness for animals and humans. Blooms are unpredictable. They can develop rapidly and may move across a water body due to wind or water current, so lake visitors must use their best judgment.
The three advisory levels are Watch, Warning and Hazard. Current advisories are listed in the table or view the current lake advisories map. To hear current advisories, call the HAB hotline at 855-HAB-LAKE or 855-422-5253.
There are no current or active advisories.
Click through the tabs to learn what to do during a Harmful Algal Bloom advisory.
Exposure to HABs, whether through contact or ingestion, can cause illness and even death in animals and humans. Do not allow livestock, pets, or working animals such as hunting dogs to drink from HAB-affected waters, eat dried scum on shorelines, or lick their fur after exposure.
For advisories that are still active outside of the monitoring season, KDHE relies on lake managers to monitor changing conditions. KDHE does not have the authority to close a lake, but does provide recommendations regarding health advisories based on analytical results. To learn more, view KDHE's full response plan page.
KDHE samples public use lakes only in response to complaints of human or animal illness or visual sighting of possible blue-green algae by the public or by lake managers or agency scientists.
Some lakes have more than one management area, or "zone." Click the images to view or download and share the full-sized zone maps for the following lakes: