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Technology Transfer Network / NAAQS
Ozone Implementation

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.
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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