On Monday, March 25, 2019, the public comment period begins on the addendum to an Exceptional Event in the Maricopa County (Greater Phoenix) O₃ nonattainment area. The comment period ends April 23, 2019. 

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Comments may be submitted as follows:
     Email | Send Email > 
     Mail: (Must be postmarked or received by April 23, 2019)

      ADEQ
      Air Assessment Section
      1110 W. Washington Street, 3415A-1
      Phoenix, AZ  85007