Health Alert issued at Merritt Reservoir; alerts continue at Rockford Lake, Willow Creek Lake

The state has issued a health alert at Merritt Reservoir in Cherry County. Alerts continue at Rockford Lake in Gage County and Willow Creek Lake in Pierce County. An alert has ended at Big Indian Creek Lake in Gage County. Samples taken earlier this week at Merritt Reservoir 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.) Although readings were below the threshold at Rockford Lake and Willow Creek Lake, the lakes will continue to be on alert for one more week. Lakes that are on health alert must have two consecutive weeks of readings below the threshold before the alert is discontinued. Since this was the final week of sampling for 2016, all alerts will end in two weeks.


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