( KLZA)-- The Nebraska State Health Department has issued a health alert for toxic blue-green algae for Iron Horse Trail Lake (Wildlife Management Area) in Pawnee County.

Health alerts have been lifted for Kirkman's Cove Lake in Richardson County, Big Indian Lake in Gage County and Rockford Lake in Gage County in southeast Nebraska after being on alert last week.

When a health alert is issued, signs are posted to advise the public to use caution, and designated swimming beaches are closed during the alert. Recreational boating and fishing are permitted, but the public is advised to use caution and avoid exposure to the water, particularly avoiding any activity that could lead to swallowing the water.

Also you should not let pets get in the water or drink from the lake.

People can still use the public areas for camping, picnics and other outdoor activities.