EPA has made the determination to reconsider the December 2020 decision to retain the ozone National Ambient Air Quality Standards (NAAQS). These standards were last revised in 2015. The CASAC Ozone Review Panel has requested a briefing from EPA on the 2020 Ozone Integrated Science Assessment and will discuss scientific issues related to it.
On this page:
See EPA’s PDF page to learn more about PDF files.
Top of Page