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3. Particulate Matter (PM-10): Federal Area Designations: California, 2011

Polygon Stanford University Public content
2011. United States. Environmental Protection Agency. Region IX. This polygon shapefile shows designated areas for particulate matter < 10 microns according to the 24-Hour National Ambient Air Quality Standard... California. Air Resources Board.

4. Particulate Matter (PM-2.5) Non-Attainment Areas: California, 2011

Polygon Stanford University Public content
2011. United States. Environmental Protection Agency. . This polygon shapefile identifies areas in the U.S. where air pollution levels have not met the 2006 National Ambient Air Quality Standards (NAAQS)... California. Air Resources Board.

5. Federal Particulate Matter (PM10) Area Designations: California, 2003

Polygon Stanford University Public content
2003. California Air Resources Board. Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). . This polygon shapefile displays particulate matter < 10 microns (PM 10) area designations pursuant to 40CFR81.305, the federal national ambient ... California. Air Resources Board.