The Kansas Department of Health and Environment and the Kansas Department of Wildlife and Parks have expanded public health advisories for Kansas lakes due to blue-green algae to include four new locations

Marion County, KANSAS – According to the state officials, the Marion Reservoir is at a Hazard level due to high toxins and high cell count. 

Authorities are asking the public to avoid Marion Reservoir and is closing all parks, boat ramps and recreation areas on the reservoir until conditions improve to acceptable levels.

A harmful algal bloom may look like foam, scum or paint floating on the water and be colored blue, bright green, brown or red.

Blooms can develop rapidly; if the water appears suspicious or there is decaying algae on the shore, avoid contact and keep dogs away.

 These toxins can be absorbed by ingestion, inhalation of aerosols and even skin contact.

Active Advisories 


  • Marion Reservoir, Marion County


  • Big Eleven Lake, Wyandotte County 
  • Colwich City Lake, Sedgwick County 
  • Gathering Pond, Geary County 
  • Herington City Lake, Dickinson County (Added on June 3)
  • Jerry Ivey Pond, Saline County 
  • Lake Shawnee, Shawnee County (Added on June 3)
  • Marion County Lake, Marion County (Added on June 3)


  • Garnett Lake (north), Anderson County (Added on June 3)