This summer, 81,000 homes in Pittsburgh received a worrisome letter about their water. The local utility “has found elevated levels of lead in tap water samples in some homes,” it said. Seventeen percent of samples had high levels of the metal, which can cause “serious health problems.”
The situation was bad enough to attract the attention of Marc Edwards, the Virginia Tech professor who helped expose the water crisis in Flint, Michigan. “The levels in Pittsburgh are comparable to those reported in Flint,” he said in an interview with local TV station WPXI.
This was surprising because until this year, Pittsburgh’s lead levels had always been normal. So what happened?
First, a bit of background: In 2012, the city faced a dilemma. Though it had clean water, its century-old water system desperately needed […]