NEW : ` ` The families can return to normal ##cy , '' the mayor said of the pollution . As many as 400,000 people were told not to consume , cook with or boil the tap water after a toxin called microcystin was found Friday in the water supply . Tests showed high levels of toxins in two Toledo neighborhoods . Microcystin , a toxin produced by algae species , found in the sewage system .
NEW : ` ` The families can return to normal ##cy , '' the mayor said of the pollution . Tests showed high levels of toxins in two Toledo neighborhoods . Microcystin , a toxin produced by algae species , found in the sewage system .