Note: EPA no longer updates this information, but it may be useful as a reference or resource.
Please see www.epa.gov/airtrends for the latest information on Air Quality Trends.
This is the twenty-third annual report on air pollution trends in the United States issued by the U.S. Environmental Protection Agency. The report is directed toward both the technical air pollution audience and other interested parties and individuals.
This report has been reviewed and approved for publication by the U.S. Environmental Protection Agency's Office of Air Quality Planning and Standards. Mention of trade names or commercial products are not intended to constitute endorsement or recommendation for use.