On November 16, 2015 the EPA proposed an update to the Cross-State Air Pollution Rule (CSAPR) ozone season program by issuing the CSAPR Update Rule. Starting in 2017, this proposal would reduce summertime emissions of oxides of nitrogen (NO_X) from power plants in 23 states in the eastern half of the U.S., providing $1.2 billion in health benefits to millions of Americans. The CSAPR Update Rule would reduce air quality impacts of the interstate transport of air pollution on downwind areas’ ability to meet the 2008 ozone standard, and it also responds to the July 2015 remand of certain CSAPR budgets by the United States Court of Appeals for the D.C. Circuit. This proposal supports states’ obligations to address the problem of air pollution that is transported across state lines and helps address the Agency’s role in backstopping states’ obligations under the Clean Air Act.

• CSAPR Update Rule Fact Sheet (PDF)(7 pp, 513 K)