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Implementation Rule for the 1997
8-hour Ozone Standard:
Air Quality Data — 1-hour and 8-hour Ozone Design Values

Information provided for informational purposes onlyNote: EPA no longer updates this information, but it may be useful as a reference or resource. See the latest information at the Ozone Implementation web site
This page links you to brief summaries of EPA's ozone air quality monitoring data. The tables contained in the summaries list 1-hour ozone design values for areas and 8-hour ozone design values for counties.

Air Quality Data
1999-2001 (PDF)
1998-2000 (HTM)
1997-1999 (HTM)

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