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Figures depicting changes in New England's air quality over the past 2-3 decades:
More detailed records of New England's changing air quality are available in the archived data section of the AIRMAP web page.
EPA National Air Pollutant Emission Trends Report, 1900 - 1995 Trends Report, 1999.
Daily ozone maps and lots of other ozone data for New England, as well as a vareity of information on ozone and smog, can be viewed at the EPA Region 1 ozone web page.
Explanation of National Ambient Air Quality Standards (NAAQS).
Final report of the Ozone Transport Assessment Group to EPA, 1997.
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