In 2009 the U.S. Environmental Protection Agency (EPA) initiated a reconsideration of the ozone standard that was promulgated in 2008. Today President Obama directed the EPA Administrator to withdraw the reconsideration.
The current 8-hour ozone standard was set in 2008 at 75 parts per billion despite a Clean Air Scientific Advisory Committee recommendation of a standard between 60-70 parts per billion. The EPA Administrator indicated that the ozone standard will be revisited in 2013 according to Clean Air Act timelines.
For more information on ozone, please visit EPA’s website at http://www.epa.gov/air/ozonepollution/.