Harmful Algal Blooms (HABs)

KDHE has established the following recommendations for a Watch, Warning, or Closure. However, Kansans should be aware that blooms are unpredictable. They can develop rapidly and may move across a waterbody due to wind or current, so visitors must exercise their best judgment. KDHE does not have the authority to close a lake. KDHE provides recommendations regarding health advisories based on analytical results.
Click here to see KDHE's full response plan.

During the HAB season, lake advisories are updated by 5:00 pm every Thursday.
See below for descriptions of the advisories and zoned lakes.

As of October 31st, the Kansas Department of Health and Environment has closed the season for Harmful Algal Bloom monitoring efforts.

Monitoring for algal blooms is concurrent with the water recreation season which lasts April 1 – October 31. While KDHE will not be issuing public health advisories for algal blooms again until April 2020, the public is encouraged to aware of algal blooms and report any health impacts to humans or animals from algal blooms to 877-427-7317 or KDHE.EpiHotline@ks.gov. For those advisories that were still active at the end of the season, KDHE relies on lake managers to continue monitoring those lakes. The KDHE Agency Response Plan for Harmful Algal Blooms can be viewed at http://www.kdheks.gov/algae-illness/Response_Plan/2019_HAB_Response_Plan.pdf.

At the end of the season, the following monitored lakes were still in active bloom:

Gathering Pond (Hatchery Supply Pond), Geary County, Warning
Jerry Ivey Pond, Saline County, Warning
Lake Jeanette, Leavenworth County, Warning
Lakewood Park Lake, Saline County, Warning
and South Lake, Johnson County, Watch

Click here to see a map of current advisories.

General Information

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 lake officials.
For KDHE to respond to a blue-green algae sighting, the request from the public must be made through the online Algae Bloom Reporting Form.

There are three types of advisories:



 •   Signage will be posted at all public access locations
 •   Water may be unsafe for humans/ animals
 •   Avoid areas of algae accumulation and do not let people/pets eat dried algae or drink contaminated water
 •   Swimming, wading, skiing, and jet skiing are discouraged near visible blooms
 •   Boating and fishing are safe. However, inhalation of the spray may affect some individuals. Avoid direct contact with water, and wash with clean water after any contact.
 •   Clean fish well with potable water and eat fillet portion only

Harmful algae is EXPECTED OR PRESENT

All of the recommendations of the Public Health Watch remain in effect, with the following addition:

 •   All contact with water, including fishing and boating, should be avoided


It is recommended that either a portion of the lake, entire lake, or zone, be closed and in some cases the adjacent land (e.g., approximately 100 ft. from the shoreline) be closed to the public. Actual setback distances will be determined on a site-specific basis, if necessary. When partial closures (i.e., beach or cove) are issued, the remaining lake or zone area will carry a warning status.

Some lakes have more than one management area, or "zone." Click on the lake name to see the zones for the following lakes: Milford, Perry, and Tuttle.

Milford Lake Zones
Milford Lake Zones
Perry Lake Zones
Perry Lake Zones
Tuttle Lake Zones
Tuttle Lake Zones

To hear advisories, call the HAB hotline at