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Regulatory Development and Retrospective Review Tracker

Review of the National Ambient Air Quality Standards for Ozone

a.k.a. Ozone NAAQS Review

RIN: 2060-AP38 (What's this?)

Docket No.: EPA-HQ-OAR-2008-0699 (What's this?)

Current Phase: Proposal (What's this?)

Under the Clean Air Act, the EPA is required to review and, if appropriate, revise the air quality criteria for the primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS) every 5 years. On March 23, 2008, the EPA published a final rule to revise the primary and secondary NAAQS for ozone to provide increased protection of public health and welfare.

With regard to the primary standard for ozone, the EPA revised the level of the 8-hour ozone standard to 0.075 ppm. With regard to the secondary ozone standard, the EPA made it identical in all respects to the primary ozone standard, as revised. The D.C. Circuit upheld the primary standard, but remanded the secondary standard back to the EPA. The EPA initiated the current review in October 2008 with a workshop to discuss key policy-relevant issues around which EPA would structure the review. This review includes the preparation of an Integrated Science Assessment, Risk/Exposure Assessment, and a Policy Assessment Document by the EPA, with opportunities for review by EPA's Clean Air Scientific Advisory Committee and the public.

NODA: Published in FR04/28/2011
NPRM: Sent to OMB for Regulatory Review10/07/2014
NPRM: Received by OMB10/08/2014
NPRM: Regulatory Review Concluded11/25/2014
NPRM: Comment Period Open12/17/2014
NPRM: Published in FR12/17/2014
NPRM: Public Meeting01/29/2015
NPRM: Public Meeting01/29/2015
NPRM: Public Meeting02/02/2015
NPRM: Comment Period Closed03/17/2015
Final Rule: Published in FR11/2015 (projected)

Potential Effects

Children's Health
This rule is likely to address an adverse impact on childhood lifestages, including prenatal (via exposure to women of childbearing age). The potential adverse impacts are expected to be due to exposure (i.e., children and/or women of childbearing age are more likely to be highly exposed than other lifestages).

  • This topic is likely to impact the health of vulnerable populations.
  • This topic is likely to impact the environmental conditions of vulnerable populations.
  • This topic is likely to present an opportunity to address an existing disproportionate impact on vulnerable populations.
  • This topic is likely to result in the collection of information or data that could be used to assess potential impacts on the health or environmental conditions of vulnerable populations.
  • This topic is likely to affect the availability of information to vulnerable populations.
  • Federal Government - other agencies
    Likely to be involved in the implementation of this rule.

    Local Governments
    Likely to be involved in the implementation of this rule.

    State Governments
    Likely to be involved in the implementation of this rule.

    Tribal Governments
    Likely to be involved in the implementation of this rule.

    Participate / Learn More

    Comment Period Open (12/17/2014 until 03/17/2015) - Click to access the document on Regulations.gov and comment by clicking "Submit Comment" near the top of the Regulations.gov page.

    Learn More

    Regulatory Review

    Some of EPA's rulemakings undergo regulatory review (What's this?), as prescribed by Executive Order 12866 and coordinated by the Office of Management and Budget (OMB). The following list describes which of this rulemaking's stages have completed review and published in the Federal Register, if any, and provides links to the review documents where available. Consult the "Timeline" section of this Web page for the dates of each review.

    • NPRM - No Information Available.
    • NPRM - No Information Available.
    Citations & Authorities

    Federal Register Citations

    Code of Federal Regulations (CFR) Citation
    40 CFR 50

    Legal Authority
    42 USC 7408;42 USC 7409


    This site provides summaries of priority rulemakings and priority retrospective reviews of existing regulations. We update most of the site at the beginning of each month, though some data is updated more frequently if it is time sensitive. The information on this site is not intended to and does not commit EPA to specific conclusions or actions. For example, after further analysis, EPA may decide the effects of a rule would be different or it may decide to terminate a rulemaking.

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