State officials have issued a health alert for toxic blue-green algae at Lone Star Lake in Fillmore County, the first health alert issued this summer.
Samples taken at Lone Star this week registered higher than the state health alert threshold of 20 parts per billion (ppb) of total microcystin (a toxin released by certain strains of blue-green algae), according to the Nebraska Department of Environmental Quality.
Lone Star will have to register two consecutive weeks of readings below the threshold for the alert to be lifted. Signs have been posted warning the public. Designated swimming beaches have been closed. Boating and fishing are permitted as well as use of the public areas for camping, picnics and other outdoor activities.
State officials take weekly samplings at 50 public lakes in Nebraska during the summer recreation season.
Sampling results for toxic algae and bacteria will be updated every Friday and posted on NDEQ’s web site, deq.ne.gov.