This blog entry provides an update to our November 26, 2014 entry on U.S. EPA’s proposal for a reduced national ambient air quality standard for ozone. The official version of U.S. EPA’s proposal was published in today’s Federal Register. Comments on the proposed rule must be submitted by March 17, 2015.

Click here to view a table of counties that would be in violation of the proposed ozone standard (based on monitored air quality from 2011-2013). Additional information on the proposed ozone standard is available on U.S. EPA’s website.