Area Designations for 1997 Ground-level Ozone Standards
Where You Live
The links on this page will direct you to information about ozone conditions and about ozone designation recommendations for the region, state and/or county where you live.
State Designations
EPA issued official designations for the 8-hour ozone standard on April 15, 2004.
They are summarized here.
Tribal Designations
EPA issued official designations for the 8-hour ozone standard on April 15, 2004. The designations impacting federally-recognized tribal lands are summarized
here.
Reclassifications
The Clean Air Act authorizes EPA to reclassify an ozone nonattainment area to the next higher or lower classification under certain conditions. EPA received nine requests for reclassification to a lower category - a "bump down." No areas requested reclassification to a higher category - a "bump up." This page includes the requests.
State Recommendations
EPA asked the states to recommend whether or not areas were in attainment for ozone in 2000. Because of continuing litigation, the Agency deferred designation action. With litigation resolved, EPA asked the states to, by July 15, 2003, either reaffirm or revise their 2000 recommendations or submit new recommendations. State recommendations for both 2000 and 2003 are presented here.
Tribal Recommendations
EPA asked the tribes to recommend whether or not areas were in attainment for ozone in 2000. Because of continuing litigation, the Agency deferred designation action. With litigation resolved, EPA asked the tribes to, by July 15, 2003, either reaffirm or revise their 2000 recommendations or submit new recommendations. Tribal recommendations for both 2000 and 2003 are presented here.
EPA Response to State Recommendations
EPA examined state recommendations for nonattainment and attainment area boundaries and issued its responses. In most cases, the Agency agreed with state's proposals. In some cases, however, EPA did not agree and outlines the Agency's recommendations in the response letters. Click on the link above to read the letters by state.
EPA Response to Tribal Recommendations
EPA examined tribal recommendations for nonattainment and attainment area boundaries and issued its responses. In most cases, the Agency agreed with tribes' proposals. If EPA disagreed, the Agency outlined its recommendations in the response letters. Click on the link above to read the read the letters by tribe.
Ozone Conditions
Map animation displays progressive ozone conditions for today and yesterday for most regions of the nation.
Frequent Questions
Answers to common questions regarding ozone and the designations process.
Air Quality Forecast
Air quality forecasts for today and tomorrow are presented for hundreds of American cities.