Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Standards - Federal Register Notices from Current Review
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.
Rulemaking Notices / Public Hearings
- Review of the NAAQS ,for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter, Final Decision - December 27, 2024
- Review of the NAAQS ,for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter, Proposed Decision - April 15, 2024
- Announcement of Public Hearing on Proposed Decision - April 15, 2024
Pre-Rulemaking Documents / Availability and Opportunities for Public Comment
- Notice of Availability - Policy Assessment for NAAQS for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter - January 2024
- Notice of Availability - Draft Policy Assessment for NAAQS for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter - May 31, 2023
- Notice of Proposed Consent Decree - July 5, 2022
- Request for Nominations: CASAC NOx/SOx/PM Secondary Panel - September 8, 2021
- Notice of Availability - Integrated Science Assessment for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter - Ecological Criteria- October 19, 2020
- Notice of Availability and Public Comment Period - Risk and Exposure Assessment Planning Document for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter - August 22, 2018
- Notice of Availability and Public Comment Period - Integrated Science Assessment for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter - Ecological Criteria, Second External Review Draft, - June 26, 2018
- Notice of Availability and Public Comment Period - Integrated Science Assessment for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter-Ecological Criteria, First External Review Draft - March 30, 2017
- Notice of Availability and Public Comment Period - Draft Integrated Review Plan for the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur - November 11, 2015
- Notice of Workshop and Call for Information on Integrated Science Assessment for Oxides of Nitrogen and Oxides of Sulfur (PDF)(3 pp, 255 K, August 29, 2013)
Public Meetings / Workshops
- Notice of CASAC Public Teleconference on Sept 5-6, 2023
- Notice of CASAC Public Meetings on May 31, June 28-29, 2023
- Notice of CASAC Public Teleconference on April 27, 2020
- Notice of CASAC Public Meeting on September 5-6, 2018
- Notice of CASAC Public Meeting on May 24-25, 2017
- Notice of CASAC Public Teleconference on December 1, 2015 (PDF)(2 pp, 180 K, October 26, 2015)
- Notice of Workshop and Call for Information on Integrated Science Assessment for Oxides of Nitrogen and Oxides of Sulfur (PDF)(3 pp, 255 K, August 29, 2013)
You may also be interested in other documents from the current nitrogen dioxide and sulfur dioxide secondary standards NAAQS review.