Residents of Toledo and environs, all 500,000 of them, have been warned not to drink or or wash with their tap water. The region’s water treatment plant found microcystin, a toxin that can cause nausea and liver damage. Boiling the water only concentrates the toxin. The source of the poison is a blue-green algae bloom on the west side of Lake Erie, thought to be caused by excessive phosphorous from agricultural runoff.
“Water crisis grips hundreds of thousands in Toledo area, state of emergency declared,” Tom Henry, Toledo Blade
“A toxic algae scare has left 500,000 people in Ohio without drinking water,” Brad Plumer , Vox
“7 Things You Need To Know About The Toxin That’s Poisoned Ohio’s Drinking Water,” Emily Atkin, Think Progress
“Cyanobacteria and Cyanotoxins: Information for Drinking Water Systems, EPA Office of Water