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United States. Environmental Protection Agency. Region IX
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Climatology, Meteorology and Atmosphere
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1. Lead (Pb): Federal Area Designations: California, 2011
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.
2. Particulate Matter (PM-10): Federal Non-Attainment Area Designations, U.S. Region 9, 2013
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.