The Portland Cement Association, in conjunction with other groups, filed a motion to intervene in the U.S. Court of Appeals for the D.C. Circuit in a lawsuit from several special interest groups. The groups are trying to make the EPA lower the National Ambient Air Quality Standard (NAAQS) for ground-level ozone below the 70 parts per billion (ppb) level set in 2015.
Vice President and Counsel of Government Affairs at PCA Michael Schon spoke on the issue:
“Ozone levels continue to drop, and today most areas meet or exceed the requirements set by EPA in 2008. Although this should be considered a great success, EPA is resetting the game by lowering ozone limits even further. This will likely make it impossible for the most difficult areas to comply.