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
Note: 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) |