As a temporary solution,bottled water was trucked into the area and the Ohio National Guard was purifying(净化) water for people.But by Monday morning,the ban had been removed.“Our water is safe,” said Toledo mayor D.Michael Collins.“Families can return to normal life.”To reassure people,he took a sip from a glass of the city's tap water.
Toledo is Ohio's fourth largest city.News about the water ban came after tests at one water-treatment plant showed high levels of the toxin microcystin(微囊藻毒素).Algae(藻类) caused the toxin.Following the warning,Ohio Governor John Kasich declared a state of emergency.Drinking the contaminated water could cause vomiting,cramps,and rashes(呕吐、腹部绞痛和疹).
To try to solve the problem,city officials added carbon and chlorine(氯) to the water.Test results on Sunday showed that the toxins had probably reached a safe level,but Mayor Collins said two tests had come back “too close for comfort”.It wasn't until Monday that the mayor announced that six new water samples had come back clean and safe to drink.
Tap water accounts for two-thirds of the drinking water consumed in homes across the US.Officials test the quality of the water to make sure it is healthy for people to drink.During the emergency in Ohio and Michigan,officials began to talk about how to stop pollutants from polluting Lake Erie.The lake supplies drinking water to 11 million people and the toxins that polluted the region's drinking water didn't just suddenly appear.
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