However, we believed that forthcoming data in 2015 would allow the EPA to make that determination. When the EPA designated the majority of areas in the country in December 2014, and March 2015, the EPA deferred initial area designations for several locations, including all of the state of Tennessee except three counties in the Chattanooga area, because the EPA could not determine using available data whether the areas were meeting or not meeting the NAAQS. The Environmental Protection Agency (EPA) is establishing air quality designations in the United States (U.S.) for the 2012 primary annual fine particle (PM2.5) National Ambient Air Quality Standard (NAAQS) for the remaining undesignated areas in the state of Tennessee.
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