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A Summary of the Nonattainment Status of the Criteria Air Pollutants


As of October 31, 2018, the EPA announced that the number of nonattainment areas are 52 ozone (8-hour 2015 standard), 37 ozone (8-hour 2008 standard), 9 PM-2.5 (2012 standard), 14 PM-2.5 (2006 standard), 34 PM10 (1987), 40 sulfur dioxide (2010 standard), 9 sulfur dioxide (1971 standard), 2 lead (1978 standard), and 11 lead (2008 standard) in the United States. There are no CO and NO2 nonattainment areas in the United States. Maps of the nonattainment areas are available for review and download.

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