U.S. Supreme Court Stays EPA Ozone Interstate Transport Rule
On Thursday, in Ohio v. Environmental Protection Agency, the U.S. Supreme Court stayed an Environmental Protection Agency (EPA) rule that would have required the implementation of additional, significant emissions controls in power plants, pipelines, cement factories, glass factories, iron and steel mills, paper mills, and other industrial facilities across 23 states. The stay provides relief to those industries as they challenge various aspects of the rule in the U.S. Court of Appeals for the D.C. Circuit — challenges on which the Supreme Court found the states and industries were likely to succeed.
D.C. Circuit Upholds U.S. EPA’s 2021 Interstate Ozone Transport Rule
On March 3, 2023, the D.C. Circuit Court of Appeals rejected an industry challenge to the April 2021 Revised Cross-State Air Pollution Rule (CSAPR) Update Rule from the Environmental Protection Agency (EPA or Agency), which required power plants in 12 “upwind” states to reduce nitrogen oxide (NOx), an ozone precursor, emissions such that those states did not inhibit downwind states’ ability to comply with the 2008 Ozone National Ambient Air Quality Standard (NAAQS).
EPA Acts on Interstate Transport Requirements for Ozone Under State Implementation Plans
On Tuesday, January 31, EPA Administrator Michael Regan finalized EPA’s disapproval of State Implementation Plan (SIP) submissions for 19 states regarding the interstate transport of ozone under the 2015 eight-hour ozone national ambient air quality standards (NAAQS) of 70 parts per billion. Under the Clean Air Act, states were required to submit SIPs for the 2015 eight-hour ozone standard by October 1, 2018. The Clean Air Act required the SIPs to include “good neighbor” provisions, which prohibit emissions that either significantly contribute to nonattainment in a neighboring state or interfere with maintenance of the NAAQS in a neighboring state.
