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EPA/AR

RIN: 2060-AO19

Publication ID: Spring 2009

Title: Review of the Primary National Ambient Air Quality Standard for Nitrogen Dioxide
Abstract: The Clean Air Act Amendments of 1977 require EPA to review and, if appropriate, revise the primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS) periodically. On October 8, 1996, the EPA published a final rule not to revise either the primary or secondary NAAQS for nitrogen dioxide (NO2). That action provided the Administrator's final determination, after careful evaluation of comments received on the October 1995 proposal, that revisions to neither the primary nor the secondary NAAQS for NO2 were appropriate at that time. On December 9, 2005, EPA's Office of Research and Development (ORD) initiated the current periodic review of NO2 air quality criteria, the scientific basis for the NAAQS, with a call for information in the Federal Register. This regulatory action is for the Agency's review of the primary NO2 NAAQS. Review of the secondary NO2 NAAQS will be part of a separate regulatory action combined with review of the sulfur dioxide NAAQS. As part of the review process, the Agency will prepare an Integrated Review Plan, an Integrated Science Assessment, and a Risk/Exposure Assessment. These documents will be reviewed by the public and by the Clean Air Scientific Advisory Committee (CASAC), an independent science advisory committee established to review the scientific and technical basis of the NAAQS. The final documents will reflect the input received through these reviews. The Administrator's proposal to retain or revise the NO2 NAAQS will be published with a request for public comment. Input received during the public comment period will be considered in the Administrator's final decision.
Agency: Environmental Protection Agency(EPA)	Priority: Economically Significant
RIN Status: Previously published in the Unified Agenda	Agenda Stage of Rulemaking: Proposed Rule Stage
Major: Yes	Unfunded Mandates: No
CFR Citation: 40 CFR 50
Legal Authority: 42 USC 7408 and 7409

Legal Deadline:

Action	Source	Description	Date
Other	Judicial	Integrated Science Assessment to be issued	07/11/2008
Final	Judicial		01/22/2010
NPRM	Judicial		06/26/2009

Timetable:

Action	Date	FR Cite
NPRM	07/00/2009
Final Action	02/00/2010

Additional Information: SAN No. 5111; EPA Docket information: EPA-HQ-OAR-2006-0922
Regulatory Flexibility Analysis Required: No	Government Levels Affected: Federal, Local, State, Tribal
Small Entities Affected: No	Federalism: No
Included in the Regulatory Plan: Yes
RIN Data Printed in the FR: No
Agency Contact: Scott Jenkins Environmental Protection Agency Air and Radiation 109 T.W. Alexander Drive, Mail Code C445-01, Research Triangle Park, NC 27711 Phone:919 541-1167 Email: jenkins.scott@epa.gov Karen Martin Environmental Protection Agency Air and Radiation C504-06, Research Triangle Park, NC 27711 Phone:919 541-5274 Fax:919 541-0237 Email: Martin.Karen@epamail.epa.gov