The state of Nebraska has issued a health alert for Harmful Algal Blooms (HAB), also known as toxic blue-green algae, at Rockford Lake in Gage County, Fremont Lake No. 9 in Dodge County, and Bluestem Lake in Lancaster County.
Maple Creek Recreation Area Lake in Colfax County has been removed from health alert after being on alert last week.
Samples taken earlier this week at the lakes on alert measure above the threshold of eight parts per billion (ppb) of total microcystin, which is a toxin released by certain strains of blue-green algae.
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. Do 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.
Weekly sampling has been conducted at 56 public lake sites since the first week of May. The lakes will continue to be monitored weekly through the end of September. To view the weekly data for the lakes sampled, go to https://deq-iis.ne.gov/zs/bw/.
The state’s monitoring is conducted early in the week at public lakes with swimming beaches and high public activity. Sampling results for HAB and bacteria are updated every Friday and posted on the Nebraska Department of Environment and Energy’s website, http://dee.ne.gov. HAB may potentially develop in the time between sample collection and sample reporting, so the public should use caution if they see signs of algal blooms. HAB may also be present in other lakes in Nebraska that are not sampled. For more information about what to look for, potential health effects from HAB, and steps to avoid exposure, please refer to the HAB Fact Sheet on NDEE’s website at http://deq.ne.gov/NDEQProg.nsf/OnWeb/ENV042607.
NDEE’s sampling partners include the Central District Health Department, Nebraska Public Power District, Upper Republican Natural Resources District, Lower Republican NRD, South Platte NRD, Middle Niobrara NRD, Lower Loup NRD, Nemaha NRD, Lower Elkhorn NRD, and the United States Army Corps of Engineers.