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.

Current Lake Advisories

Lake County Level
Atchison County Park Lake
Big Eleven Lake
Camp Hawk Lake
Carousel Lake in Gage Park
Elk Horn Lake
Gathering Pond (Hatchery Supply Pond)
Hiawatha City Lake
Hodgeman County State Fishing Lake
Jerry Ivey Pond
Lake Afton
Lake Jeanette
Lake Shawnee
Lakewood Park Lake
Lebo Kids' Pond
Marion County Lake
Meadowbrook Park Lake
Melvern Outlet Pond
Melvern Outlet Swim Pond
Neosho County State Fishing Lake
Rock Garden Pond in Gage Park
South Lake
Westlake in Gage Park
Yates Center Kids' Fishing Pond
Atchison County
Wyandotte County
Harvey County
Shawnee County
Jackson County
Geary County
Brown County
Hodgeman County
Saline County
Sedgwick County
Leavenworth County
Shawnee County
Saline County
Coffey County
Marion County
Johnson County
Osage County
Osage County
Neosho County
Shawnee County
Johnson County
Shawnee County
Woodson County
Watch
Watch
Watch
Watch
Warning
Warning
Warning
Watch
Warning
Watch
Warning
Watch
Warning
Watch
Warning
Warning
Warning
Warning
Watch
Watch
Watch
Warning
Warning

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:

WATCH WARNING LAKE CLOSURE

Harmful algae is POSSIBLE AND MAY BE PRESENT

 •   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

Harmful algae is PRESENT AND EXTREME CONDITIONS EXIST

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
785-296-1664