Area Designations Maps / State and National
This page last reviewed September 22, 2009
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This web site provides area designation maps of California for all criteria pollutants that are designated for
the State and National standards. These maps are updated annually for the State area designations,
as required by the Health and Safety Code (H&SC) section 39608. The Board makes State area designations for
ten criteria pollutants: ozone, suspended particulate matter (PM10), fine suspended particulate matter (PM2.5),
carbon monoxide, nitrogen dioxide, sulfur dioxide, sulfates, lead, hydrogen sulfide, and visibility reducing particles.
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2006 State Area DesignationsThese changes became effective on July 26, 2007. There have been no regulatory changes to the State Area Designations since that time. These maps are the most current available.
National Area DesignationsThe following maps were current as of February 2009. Please refer to the U.S. EPA website to see if any changes have been made since that time. The new PM2.5 National Area Designations will be posted as soon as they become finalized. The National 1-Hour Ozone Standard was revoked in June 2005.
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For comments on page, email: tnajita@arb.ca.gov
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Area Designations Activities and Maps
