Northeast states back Illinois’ suit over ozone NAAQS designations

Northeastern and other states are backing a suit from Illinois, the city of Chicago and environmentalists over EPA’s final designation of areas as either meeting or violating the 2015 federal ozone standard, faulting the agency for what they say is its failure to designate enough areas in “nonattainment,” which threatens air quality “downwind.” In an amicus brief filed Feb. 1 in the U.S. Court of Appeals for the District of Columbia Circuit suit Clean Wisconsin, et al. v. EPA,...