An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Sulfur Dioxide (SO2) Pollution

Sulfur Dioxide (SO2) Primary Standards Documents from Current Review - Federal Register Notices

Over the course of each NAAQS review, EPA publishes notices in the Federal Register for a variety of activities:  the kick-off workshop and call for information, CASAC meetings, availability of pre-rulemaking documents and opportunities for comment on these documents, as well as proposed and final rulemaking decisions and public hearings on a proposed rulemaking decision. 

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Federal Register Notices
Date(yyyy.mm.dd) Type Title

2015.11.24

Pre-Rulemaking

Notice of Availability and Public Comment Period - Integrated Science Assessment: External Review Draft (PDF)(2 pp, 197 K)

2014.11.10 Pre-Rulemaking

Notice of Availability - Final Integrated Review Plan (PDF)(2 pp, 218 K)

2014.03.12 Pre-Rulemaking

Notice of Availability and Public Comment Period - Draft Integrated Review Plan (PDF)(3 pp, 154 K)

2015.12.21 CASAC Meeting

Notice of CASAC Public Meeting - January 27-28, 2016 (PDF)(2 pp, 192 K)

2014.06.18 CASAC Meeting

Notice of CASAC Teleconference - June 18, 2014 (PDF)(2 pp, 213 K)

2014.05.27 CASAC Meeting

Notice of CASAC Teleconference - May 27, 2014 (PDF)(2 pp, 214 K)

2014.03.25 CASAC Meeting

Notice of CASAC Consultation - April 22, 2014 (PDF)(2 pp, 214 K)

2013.05.10 Call for Information/Workshop

Notice of Workshop and Call for Information on Integrated Science Assessment (PDF)(2 pp, 216 K)

You may also be interested in other documents from the current ozone NAAQS review.