EPA Chief Says All 50 States Following Lead Drinking Water Rule: All 50 states told the Environmental Protection Agency they're in line with federal standards for implementing the Lead and Copper Rule for drinking water in the wake of the crisis in Flint.  In a letter to state regulators Thursday, EPA Administrator Gina McCarthy said the agency received responses from all 50 states stating that their protocols and procedures for finding lead and copper in drinking water were consistent with EPA guidance.  McCarthy initially asked for a review in late February.  A number of states wrote of the challenges they face in trying to boost the availability of public information “because of limited information technology resources and/or concerns with privacy and security.”  Also last week, EPA sent a letter to states in response to their reports.