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Ozone Standards Review: Progress Report and Future Plans December 2011

This report provides an overview of the current status of 8-hour ozone standards, including multi-factor analysis, air quality, emissions data, and SIP requirements. It outlines timelines for ozone classification, designations, and SIP requirements for nonattainment areas. The review of the Ozone NAAQS, Section 109(d) requirements, planning, integrated science assessment, risk assessment, policy assessment, and rulemaking processes are discussed.

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Ozone Standards Review: Progress Report and Future Plans December 2011

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  1. 8-Hour Ozone Status(where we are and what’s next)December 2011 Air Planning Section EPA Region 6

  2. Ozone NAAQS Tentative Schedule

  3. Ozone Classification Timelines

  4. SIP Requirements for Ozone Nonattainment Areas

  5. Designations • Multi-factor analysis • Air quality data • Emissions data • Population density and degree of urbanization • Traffic and commuting patterns • Growth rates and patterns • Level of control of emissions sources • Geography/Topography • Meteorology • Jurisdictional boundaries

  6. Review of the Ozone NAAQS • Section 109(d) - review of NAAQS every 5 years • Planning • Final review plan published 4/2011 • Integrated Science Assessment (ISA) • 2nd External Review Draft published 9/2011 • Risk Exposure/Assessment • Policy Assessment • drafts expected mid-2012/early 2013 • Rulemaking • To view documents from current review: http://www.epa.gov/ttn/naaqs/standards/ozone/s_o3_index.html

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