Lake Erie Toledo water crisis (2014)
A massive harmful algal bloom in Lake Erie produced microcystin that contaminated Toledo's drinking water. The city told 400,000 residents not to use tap water for drinking, cooking, or bathing for three days.
Toledo issued a 'do not drink' advisory for three days while the water system was flushed. The National Guard delivered bottled water to residents.
The crisis spurred new state and federal efforts to reduce phosphorus runoff into Lake Erie and improve algal bloom monitoring.
Shows the potential severity of microcystin-producing blooms and why health officials act quickly when the toxin is detected.
