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The Green Book Nonattainment Areas
for Criteria Pollutants

What's New

The State Implementation Plan Status Website is now available.

PM-2.5 Areas for the 2006 Standard were designated, effective Dec 14, 2009.

GIS area shapefile and external data file downloads for 8-hour Ozone and PM-2.5 are available.


NAAQS information can be found by clicking on the "Standards Review" and "Basic Info" sidebar links.

Questions concerning the status of nonattainment areas, their classification and EPA policy should be directed to the appropriate Regional Office. EPA Headquarters should be contacted only when the Regional Office is unable to answer a question.

Areas of the country where air pollution levels persistently exceed the national ambient air quality standards may be designated "nonattainment." To view a list of areas designated nonattainment, select one of the pollutants below:

Federal Register Notices published or due to become effective after this Green Book was posted.
List of new Federal Register Notices included this version of the Green Book since last publication.

Information on the National Ambient Air Quality Standards can be found at http://www.epa.gov/ttn/naaqs/

Other Related Information:


If you have questions for State or Local Air Pollution Agencies contact:
The National Association of Clean Air Agencies (formerly STAPPA and ALAPCO) at
http://www.4cleanair.org Exit EPA disclaimer and http://www.4cleanair.org/DirectoryAlapco.asp.Exit EPA disclaimer
State and Local Agency Web pages and other contacts are available
at the Partners-Working Together for Clean Air site.

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