Suit Targets EPA’s ‘Exceptional Events’ Waiver As Officials Vow Greater Use

The Sierra Club is asking a federal appellate court to reverse EPA’s redesignation of Detroit into attainment for ozone, a challenge to the agency’s implementation of its “exceptional events” policy -- just as the Biden administration is stepping up its use of the policy to ease states’ attainment of imminent new particulate matter (PM) standards. In a Jan. 9 opening brief , the group urged the U.S. Court of Appeals for the 6th Circuit to reverse EPA’s 2023 decision to...