Kansas health officials have issued warnings for seven lakes around the state because of toxic algae.

The Kansas Department of Health and Environment said in a release Thursday that high levels of toxic blue-green algae have been found at Chisolm Creek Park Lake in Sedgwick County, Marion Reservoir, Memorial Park Lake in Barton County, Milford Reservoir in Clay, Geary and Dickinson counties, Jewell State Fishing Lake, Lake Warnock in Atchison County and South Park Lake in Johnson County.

Warnings mean water conditions aren’t safe for direct contact and that wading, skiing and swimming should be prohibited.