2018•Unpublished venueRequires access
Lead (Pb) NAAQS Designations, Region 9, 2008, US EPA Region 9
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Abstract
polygon esri shapefile of designated areas for lead pb areas designated nonattainment are geographic areas which have not met the 2008 national ambient air quality standards nnaqs for lead pb 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 more detailed information about naaqs can be found on the following web page http www epa gov ttn naaqs