First, in October 2014, just six months after the switch, General Motors stopped using the water at its engine plant. The company got a waiver to go back to the Lake Huron water as its source. “You don’t want the higher chloride water (to result in) corrosion,” the GM spokesperson said. “We noticed it some time ago.” If the water was corroding metal engine parts, what was it doing to the ancient lead pipes under the city?
