Public Health Advisories for Kansas Lakes Due to Blue-Green Algae

TOPEKA – The Kansas Department of Health and Environment (KDHE) and the Kansas Department of Wildlife and Parks (KDWP) has issued several public health advisories for Kansas lakes due to blue-green algae.

Active Advisories


  • Gathering Pond at Milford, Geary County
  • Milford Lake Zone C, Geary County
  • Harvey County East Lake, Harvey County
  • Altamont City Lake β€œIdle Hour” Main Lake, Labette County
  • Big Hill Lake, Labette County
  • Parsons Lake, Labette County (new)
  • Marion County Lake, Marion County (upgraded 7/22)
  • Melvern Outlet Pond, Osage County (upgraded 7/22)
  • ebster Reservoir, Rooks County
  • Jerry Ivey Pond, Saline County
  • Hargis Lake, Sumner County (new)
  • Big Eleven Lake, Wyandotte County


  • Brown State Fishing Lake, Brown County
  • Mission Lake Horton, Brown County
  • Milford Lake Zones AΒ andΒ B, Geary County
  • South Lake, Johnson County
  • Altamont City Lake β€œIdle Hour” North Lake, Labette County
  • Marion Reservoir, Marion County (downgraded 7/22)
  • Overbook City Lake, Osage County
  • Agra City Lake, Phillips County
  • Atwood Township Lake, Rawlins County

Advisories Lifted 7/22/21

  • Herington Reservoir (New City Lake), Dickinson County
  • Herington City Lake (Old Lake), Dickinson County
  • Geary State Fishing Lake, Geary County
  • Horsethief Reservoir, Hodgeman County
  • Linn Valley Lake, Linn County
  • River Pond below Tuttle Reservoir, Riley County

When a warning is issued, KDHE recommends the following precautions be taken:

  • Lake water is not safe to drink for pets or livestock.
  • Lake water, regardless of blue-green algae status, should never be consumed by humans.
  • Water contact should be avoided.
  • Fish may be eaten if they are rinsed with clean water and only the fillet portion is consumed, while all other parts are discarded.
  • Do not allow pets to eat dried algae.
  • If lake water contacts skin, wash with clean water as soon as possible.
  • Avoid areas of visible algae accumulation.

A watch means that blue-green algae have been detected and a harmful algal bloom is present or likely to develop. People are encouraged to avoid areas of algae accumulation and keep pets and livestock away from the water.

During the watch status, KDHE recommends the following precautions be taken:

  • 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.

KDHE investigates publicly-accessible bodies of water for blue-green algae when the agency receives reports of potential algae blooms in Kansas lakes. Based on credible field observation and sampling results, KDHE reports on potentially harmful conditions.

Signs of a possible bloom include if there is scum, a paint-like surface or the water is bright green, avoid contact and keep pets away. These are indications that a harmful bloom may be present. Pet owners should be aware that animals that swim in or drink water affected by a harmful algal bloom or eat dried algae along the shore may become seriously ill or die.

For information on blue-green algae and reporting potential harmful algal blooms, please visitΒ

Derek Nester
Derek Nester
Derek Nester was born and raised in Blue Rapids and graduated from Valley Heights High School in 2000. He attended Cowley College in Arkansas City and Johnson County Community College in Overland Park studying Journalism & Media Communications. In 2002 Derek joined Taylor Communications, Inc. in Salina, Kansas working in digital media for 550 AM KFRM and 100.9 FM KCLY. Following that stop, he joined Dierking Communications, Inc. stations KNDY AM & FM as a board operator and fill-in sports play-by-play announcer. Starting in 2005 Derek joined the Kansas City Chiefs Radio Network as a Studio Coordinator at 101 The Fox in Kansas City, a role he would serve for 15 years culminating in the Super Bowl LIV Championship game broadcast. In 2020 he moved to Audacy, formerly known as Entercom Communications, Inc. and 106.5 The Wolf and 610 Sports Radio, the new flagship stations of the Kansas City Chiefs Radio Network, the largest radio network in the NFL. Through all of this, Derek continues to serve as the Digital Media Director for Sunflower State Radio, the digital and social media operations of Dierking Communications, Inc. and the 6 radio stations it owns and operates across Kansas.

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