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    <titleInfo>
      <title>Carbon Monoxide (CO): Federal Non-Attainment Area Designations: U.S. Region 9, 2011</title>
    </titleInfo>
    <name type="corporate">
      <namePart>United States. Environmental Protection Agency. Region IX</namePart>
      <role>
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    <genre valueURI="http://id.loc.gov/authorities/genreForms/gf2011026297" authority="lcgft">Geospatial data</genre>
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    <abstract lang="eng" displayLabel="Abstract">This polygon shapefile represents nonattainment areas for carbon monoxide (CO) in EPA Region 9, including California, Nevada and Arizona, for 2011. Nonattainment areas are geographic areas which have not met National Ambient Air Quality Standards (NAAQS) for carbon monoxide air pollution. These standards are part of the Clean Air Act. See Code of Federal Regulations, Section 40 Part 81, for detailed information about Ambient Air Quality Standards.</abstract>
    <abstract lang="eng" displayLabel="Purpose">This data set is specifically designed for use with ArcGIS and related software. Data may be used for reference to boundaries of attainment areas in Region 9.</abstract>
    <note lang="eng" displayLabel="Preferred citation">U.S. Environmental Protection Agency. Region 9. (2011). Carbon Monoxide (CO): Federal Non-Attainment Area Designations: California, 2011. U.S. EPA. Region 9. Available at: http://purl.stanford.edu/fm609qg0766</note>
    <note displayLabel="Supplemental information">Maintenance areas updated December 19, 2011
More detailed information about NAAQS can be found on the following web page:http://www.epa.gov/airprogm/oar/oaqps/greenbk</note>
    <note displayLabel="WGS84 Cartographics">This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.</note>
    <subject authority="lcsh" lang="eng">
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    </subject>
    <subject authority="lcsh" lang="eng">
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    </subject>
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      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5551752/">Arizona</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/3687919/">California</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5509151/">Nevada</geographic>
    </subject>
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      <dateIssued encoding="w3cdtf" keyDate="yes">2011</dateIssued>
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      <place>
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      <publisher>United States. Environmental Protection Agency. Region IX</publisher>
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      <recordContentSource>Stanford</recordContentSource>
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        <title>California Air Resources Board GIS Maps &amp; Data</title>
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    <accessCondition type="useAndReproduction">This item is in the public domain.  There are no restrictions on use.</accessCondition>
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