 According to the EPA, lead poisoning is the number one environmental health threat in the U.S. for children ages 6 and younger.No new standards have been set since 2001, though it is agreed that the old standards need to be updated.In December 2017, after Pruitt requested six more years to regulate lead levels, a divided federal appeals court issued a writ of mandamus ordering Pruitt to regulate lead within the next 90 days.