An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Sulfur Dioxide (SO2) Pollution

1‐Hour SO2 NAAQS Implementation: Final Data Requirements Rule, Webinar Slides

Presentation Overview:

  • SO2 NAAQS Data Requirements Rule (DRR)
    • Final rule was signed on August 10, 2015.
    • Information available on: http://www.epa.gov/oaqps001/sulfurdioxide/implement.html
  • The DRR was developed to address the need for additional air quality data to be used for implementing the 2010 1‐hour SO2 NAAQS.
    • The existing SO2 monitoring network characterizes localized SO2 source impacts in a limited set of areas.
    • Under the DRR, air agencies will provide additional air quality data characterizing 1‐hour peak concentrations and source‐oriented impacts.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.