2013. United States. Environmental Protection Agency. Region IX. This polygon shapefile contains nonattainment areas for particulate matter < 10 microns. Nonattainment areas are geographic areas which have not... United States. Environmental Protection Agency. Region IX.
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2011. United States. Environmental Protection Agency, Region IX. This polygon shapefile contains designated areas for particulate matter < 2.5 microns, according to the annual National Ambient Air Quality Stan... United States. Environmental Protection Agency, Region IX.
2011. United States. Environmental Protection Agency. This polygon shapefile contains area designations of lead attainment (Pb) in California (Region 9). There are three categories of designations: : n... United States. Environmental Protection Agency. Region IX.
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.
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.
2011. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This polygon shapefile shows area designations in California as required under Health and Safety Code section 39608 for ozone, nitrogen dioxide, su... California. Air Resources Board.
2010. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the sulfur diox... United States. Bureau of Transportation Statistics.
2008. California. Air Resources Board. Planning and Technical Support Division and United States. Environmental Protection Agency. This polygon shapefile contains area designations of carbon monoxide (CO) levels in California as required under Health and Safety Code section 396... California. Air Resources Board.
2008. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This polygon shapefile contains area designations of hydrogen sulfide levels in California as required under Health and Safety Code section 39608. ... California. Air Resources Board.
2008. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the lead (Pb) 3... United States. Bureau of Transportation Statistics.
2008. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) ... United States. Bureau of Transportation Statistics.
2006. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.
2004. California. Air Resources Board. Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). . The California Air Basins layer is a polygon shapefile coverage representing the 15 California air basins, as defined in state statute and regulati... California. Air Resources Board.
2004. California Air Resources Board. Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). . The California Air Districts layer is a polygon shapefile coverage representing the California air pollution control and air quality management dis... California. Air Resources Board.
2003. California Office of Statewide Health Planning and Development. This polygon shapefile displays federal Nitrogen Oxide (NO2), Sulfur Dioxide (SO2), and Carbon Monoxide (CO) area designations contained in 40CFR81... California. Air Resources Board.
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.
2003. California Air Resources Board. Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). . This polygon shapefile contains federal one-hour ozone area designations and their classifications as per 40CFR81.305, part of the National Ambient... California. Air Resources Board.
2002. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This point shapefile represents all air monitoring stations active in California from 2001 until 2003. The data within the shapefile was obtained f... California. Air Resources Board.
2001. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This point shapefile represents all air monitoring stations active in California from 2001 until 2003. The data within the shapefile was obtained f... California. Air Resources Board.
1997. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) ... United States. Bureau of Transportation Statistics.
1997. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.
1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.
1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the nitrogen di... United States. Bureau of Transportation Statistics.
1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3)1... United States. Bureau of Transportation Statistics.
1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.
1987. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.
1979. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) ... United States. Bureau of Transportation Statistics.
1978. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the lead (Pb) 3... United States. Bureau of Transportation Statistics.
1978. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the sulfur diox... United States. Bureau of Transportation Statistics.
1971. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.
1971. Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the nitrogen di... United States. Bureau of Transportation Statistics.
1971. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the sulfur diox... United States. Bureau of Transportation Statistics.
