A law signed by Gov. Tom Wolf on Nov. 3 encourages doctors to test pregnant women, and children up to 2 years old, who they believe have been exposed to lead. Act 150 is a smart move, but it doesn’t go far enough. Lead is everywhere — especially in industrial regions with older housing, which means Pittsburgh and vast swaths of Pennsylvania. Sen. Lisa Baker, R.-Luzerne, wanted Act 150 to make testing mandatory, but it was watered down in the amendment process. Now she’s reintroducing a bill to switch “encourage” back to “require,” making lead testing mandatory for all young...