Exceptional Events

The South Coast Air Quality Management District (SCAQMD) is seeking public comments on the flagging of ambient air quality data influenced by exceptional events.  The purpose of this request for public comment is to seek input on whether certain days should be flagged for exclusion from consideration in deciding attainment of the federal clean air standards for PM10 particulate matter.  Exceptional events that influence air quality include natural events, such as high winds, volcanic activity and wildfires, as well as national or cultural traditions like Independence Day fireworks displays. Please see the notice for further information.