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Start Over You searched for: Year 2013 Remove constraint Year: 2013 Resource Class Datasets Remove constraint Resource Class: Datasets Subject Air quality management Remove constraint Subject: Air quality management

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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.