An algae outbreak results in health alerts for some Nebraska lakes.
The state has issued a health alert for toxic blue-green algae at Swan Creek Lake #5A, at Willard L. Meyer Recreation Area, in Saline County and a health alert also continues to be in effect at Kirkman's Cove in Richardson County.
Weekly sampling has been conducted at 49 public lakes in Nebraska since the beginning of May.
Samples taken earlier this week at Swan Creek Lake #5A and Kirkman's Cove were above the state's health alert threshold of 20 parts per billion (ppb) of total microcystin - a toxin released by certain strains of blue-green algae.
Kirkman's Cove had also tested high last week.
The alerts will continue at the lakes for at least two more weeks, because lakes that are on health alert must have two consecutive weeks of readings below the threshold before the alert is discontinued.
Signs have been 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 avoid activities that could involve accidental ingestion of water and to avoid full immersion in water.
People can still use the public areas for camping, picnics and other outdoor activities.
The lakes will continue to be monitored weekly throughout this year's recreational season. Sampling results for toxic algae and bacteria will be updated every Friday and posted on NDEQ's web site, http://deq.ne.gov/.