"I'm waiting for two or three days," said Aretha Howard, of Toledo. "I have a pregnant daughter at home. She can't drink this water."
Drinking the tainted water could cause vomiting, cramps and rashes. No serious illnesses had been reported, health officials said Monday.
Tap water accounts for two-thirds of the drinking water consumed in homes across the U.S., according to a study released by the U.S. Department of Agriculture three years ago, while research from the Beverage Marketing Corporation shows that bottled water makes up half of all water consumed nationwide.
Combating the toxins in Toledo's water was a challenge because of the size of the system and a lack of standards on how to test the water.
"We knew we had a problem," Kasich said. "The question was how do we measure it, and what do we about it?"
Carbon was added to the water at the point of intake and chlorine was also dumped into the system to help clean the water, the mayor said.
"This isn't an exact science," said Collins, who took a drink of the tap water Monday morning, saying it tasted great.
Regulators monitoring the situation ran a variety of samples before settling on one of four tests available. They plan on using the test recommended by the U.S. Environmental Protection Agency going forward, the governor said. The state EPA, according to Kasich, also will be looking at setting rules on how often the water should be tested — something that isn't in place now.