Cross-State Air Pollution Rule (CSAPR)

On July 6, 2011, the EPA issued the Cross-State Air Pollution Rule (CSAPR) to comply with the July 11, 2008, vacatur and the December 23, 2008, Court of Appeals remand of the Clean Air Interstate Rule.

However, on August 21, 2012, the U.S Court of Appeals for the DC Circuit issued a ruling vacating CSAPR. On June 24, 2013, the U.S. Supreme Court granted the EPA's petition asking the court to review the DC Circuit court's decision. For updates on this case, see EPA's CSAPR webpage .