Ground-level Ozone Standards Designations
Where You Live
The links on this page will direct you to information about ozone conditions and about ozone designations for the region, state and/or county where you live.
Area Designations for the 1997 Ground-level Ozone Standards
EPA issued these designations on April 15, 2004. They are summarized here.
Area Designations for the 2008 Ground-level Ozone Standards
EPA is in the process of determining compliance with this standard. The status of this effort is summarized here.
Map animation displays progressive ozone conditions for today and yesterday for most regions of the nation.
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.
Related sites offering further information and assistance including a SIP Toolkit, control measure guidance, and easy access to the Ozone Designations Docket.