Lincoln, NE – Nebraska has issued a health alert for Harmful Algal Blooms (HABs), also known as toxic blue-green algae, at Rockford Lake in Gage County. Samples taken earlier this week at Rockford Lake 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 a...