EPA withdraws ozone NAAQS 'classifications' rule

EPA has withdrawn from White House Office of Management and Budget (OMB) review its proposed “classifications” rule defining the severity of areas' “nonattainment” with the 2015 federal ozone standard, suggesting the agency could fall further behind in its already delayed efforts to implement the standard. The ozone classifications rule, which EPA sent to OMB Sept. 21 , is part of the package of measures EPA must publish to enable states to plan their implementation of its 2015 ozone national ambient...