EPA poised to tighten copper smelter air rule

EPA is preparing to issue a final rule tightening air toxics limits for primary copper smelters, after the regulation cleared White House Office of Management and Budget (OMB) interagency review April 26, paving the way for Administrator Michael Regan to sign the rule that will likely add limits for mercury and other harmful air pollutants. EPA is under a judicial deadline to issue the final rule by May 2, imposed in litigation brought by environmentalists to force tougher regulation in...