March 31, 2015 - EPA is establishing or revising initial area designations and a technical amendment to correct an inadvertent error in the initial designation for one area for the 2012 annual national ambient air quality standards for fine particle pollution. 

• Federal Register Notice (pdf) (17 pp, 289 KB) - April 7, 2015

See other area designations for the 2012 Annual Fine Particle Standard

• Fact Sheet (pdf) (107.44 KB)
• Map Showing Designated and Deferred Areas (pdf) (69.39 KB)