Exceptional Events

An exceptional event is an unusual or naturally occurring event that can affect air quality but is not reasonably controllable. Occasionally, an exceptional event can cause an exceedance of the standards of air quality. The Environmental Protection Agency promulgated the Exceptional Events Rule on March 22, 2007 to treat data influenced by exceptional events that result in violations of the NAAQS. The Rule allows states to "flag" air quality monitoring data as an exceptional event and exclude that data from use in determining a violation of the NAAQS, if the U. S. EPA concurs with the demonstration submitted.

State of Nevada Exceptional Event Demonstrations

Analysis of the King Fire as an exceptional event and its contribution to hight PM2.5 concentrations in Carson City, Nevada

king-fire-exceptional-event-package

Analysis of the trailhead wildfire in California as an exceptional event and its contribution to high ozone concentrations in Fernley, Nevada


Analysis of 2016 California wildfires as an exceptional events and their contribution to high ozone concentrations in Fallon, Nevada


 

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