Ozone NAAQS Review - Analyses and Data Sets
The Clean Air Act requires EPA to set national air quality standards for ozone and five other pollutants considered harmful to public health and the environment (the other pollutants are carbon monoxide, lead, nitrogen oxides, particulate matter and sulfur dioxide). The law also requires EPA to periodically review the standards to ensure that they provide adequate health and environmental protection, and to update those standards as necessary. Learn more about this process
Contact: Ben Wells
wells.benjamin@epa.gov
(919) 541-7507
- Overview of Ozone (O3) Air Quality in the U.S.
- Analyses and Data Sets from Review Completed in 2020
- Air Quality Data Sets Developed for the Exposure/Risk Analyses
- Related Links
Overview of Ozone (O3) Air Quality in the U.S.
The documents in this section present an overview of the current state of ozone air quality in the U.S. based on recent air pollutant emissions and air quality monitoring data.
- Overview of Ozone (O3) Air Quality in the United States, based on data through 2023 (pdf)
- Overview of Ozone (O3) Air Quality in the United States, based on data through 2022 (pdf)
- Overview of Ozone (O3) Air Quality in the United States, based on data through 2021 (pdf) (4.72 MB)
Analyses and Data Sets from Review Completed in 2020
- Design Values and W126 Values for all U.S. ozone monitoring sites, 2000-2018 (XLSX) (xlsx)
- Design Values and W126 Values for ozone monitoring sites in or near Class I areas, 2000-2018 (XLSX) (xlsx)
- Daily Maximum 1-hour ozone concentrations reported at U.S. monitoring sites, 2000-2018 (ZIP) (zip)
- Daily Maximum 8-hour Ozone concentrations reported at U.S. monitoring sites, 2000-2018 (ZIP) (zip)
Air Quality Data Sets Developed for the Exposure/Risk Analyses
See the Policy Assessment (Appendix 3C) for a description of exposure/risk analysis.
- APEX air quality inputs for Atlanta, Observed 2015-2017 (ZIP) (zip)
- Data for Atlanta were not adjusted to meet 75 ppb because the observed 2015-2017 design value was equal to 75 ppb.
- APEX air quality inputs for Atlanta, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Atlanta, Adjusted to meet 65 ppb (ZIP) (zip)
- APEX air quality inputs for Boston, Observed 2015-2017 (ZIP) (zip)
- APEX air quality inputs for Boston, Adjusted to meet 75 ppb (ZIP) (zip)
- APEX air quality inputs for Boston, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Boston, Adjusted to meet 65 ppb (ZIP) (zip)
- APEX air quality inputs for Dallas, Observed 2015-2017 (ZIP) (zip)
- APEX air quality inputs for Dallas, Adjusted to meet 75 ppb (ZIP) (zip)
- APEX air quality inputs for Dallas, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Dallas, Adjusted to meet 65 ppb (ZIP) (zip)
- APEX air quality inputs for Detroit, Observed 2015-2017 (ZIP) (zip)
- APEX air quality inputs for Detroit, Adjusted to meet 75 ppb (ZIP) (zip)
- APEX air quality inputs for Detroit, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Detroit, Adjusted to meet 65 ppb (ZIP) (zip)
- APEX air quality inputs for Philadelphia, Observed 2015-2017 (ZIP) (zip)
- APEX air quality inputs for Philadelphia, Adjusted to meet 75 ppb (ZIP) (zip)
- APEX air quality inputs for Philadelphia, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Philadelphia, Adjusted to meet 65 ppb (ZIP) (zip)
- APEX air quality inputs for Phoenix, Observed 2015-2017 (ZIP) (zip)
- APEX air quality inputs for Phoenix, Adjusted to meet 75 ppb (ZIP) (zip)
- APEX air quality inputs for Phoenix, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Phoenix, Adjusted to meet 65 ppb (ZIP) (zip)
- APEX air quality inputs for Sacramento, Observed 2015-2017 (ZIP) (zip)
- APEX air quality inputs for Sacramento, Adjusted to meet 75 ppb (ZIP) (zip)
- APEX air quality inputs for Sacramento, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Sacramento, Adjusted to meet 65 ppb (ZIP) (zip)
- APEX air quality inputs for Saint Louis, Observed 2015-2017 (ZIP) (zip)
- APEX air quality inputs for Saint Louis, Adjusted to meet 75 ppb (ZIP) (zip)
- APEX air quality inputs for Saint Louis, Adjusted to meet 70 ppb (ZIP) (zip)
- APEX air quality inputs for Saint Louis, Adjusted to meet 65 ppb (ZIP) (zip)
Related Links
Data resources related to the W126 exposure index
View technical information on Ozone NAAQS Review
View general public information on air quality standards, trends, health and environmental effects, and programs to reduce Ozone