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Sulfates
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Stanford
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California
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2011
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1. Annual Particulate Matter (Annual PM-2.5) Non-Attainment Designations in Region 9, 2011
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.
2. Particulate Matter (PM-10): Federal Area Designations: California, 2011
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.
3. Particulate Matter (PM-2.5) Non-Attainment Areas: California, 2011
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.