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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.
2013. California. Office of Statewide Health Planning and Development. This point shapefile represents rural healthcare clinics in California as of August 27, 2013. This layer is part of the Healthcare Atlas of Califor... California. Office of Statewide Health Planning and Development.