You searched for: Author United States. Environmental Protection Agency. Remove constraint Author: United States. Environmental Protection Agency. Format Shapefile Remove constraint Format: Shapefile Subject Organic compounds Remove constraint Subject: Organic compounds Subject Air quality management Remove constraint Subject: Air quality management Subject Climatology, Meteorology and Atmosphere Remove constraint Subject: Climatology, Meteorology and Atmosphere Place California Remove constraint Place: California
2011. United States. Environmental Protection Agency. . This polygon shapefile identifies areas in the U.S. where air pollution levels have not met the 2006 National Ambient Air Quality Standards (NAAQS)... California. Air Resources Board.