The March, 2007 "Treatment of Data Influenced by Exceptional Events" final rule
provides air quality agencies the opportunity to flag air quality National Ambient
Air Quality Standards (NAAQS) exceedance data associated with "exceptional events"
and request EPA to concur with the flag and exclude the data for compliance with
One of the requirements of the rule is to provide the public an opportunity to review
and comment on the air quality agency's documentation. This webpage satisfies that
requirement. If you have any questions or comments please contact
Scott Dibiase with Pinal County Air Quality via email or phone (520) 866-6929.