April 30, 2018 - Highlighting its commitment to collaborating with states, tribes, and localities to protect air quality, EPA is taking the next step in the Clean Air Act process to implement the national air quality standards for ozone that were issued in 2015. After designating most of the U.S. as meeting the standards in November 2017, the Agency is now completing nearly all remaining area designations. Eight counties in the San Antonio, Texas area will be designated by July 17, 2018.
Read communications between EPA and states and tribes as well as technical support documents.
Read the Federal Register Notice: Additional Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards
See other area designations for the 2015 Ozone Standards
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Fact Sheet: Additional Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards (PDF)(8 pp, 191 K)
- Summary Table: Additional Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards (PDF)(4 pp, 108 K)
- Map: Nonattainment Area Designations for the 2015 Ozone Standards (April 30, 2018) (PDF)(1 pg, 475 K)
- Response to Comments: Additional Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards (PDF)(82 pp, 888 K)