Possible cost to replace Chicago’s lead water lines: $10 billion – Crain’s

A 2018 Tribune analysis discovered that 30 percent of 2,797 homes where tap water was sampled had lead concentrations higher than 5 parts per billion. That’s the highest level the U.S. Food & Drug Administration allows in bottled water. Tests of park drinking fountains in 2016 “found dangerously high lead-levels in 452” fountains, WBEZ reported, “some 80 times higher than the EPA limit."