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Ozone Implementation

Section 126 Petitions

Information provided for informational purposes onlyNote: EPA no longer updates this information, but it may be useful as a reference or resource.
Section 126 Petitions--Findings of Significant Contribution and Rulemakings

In accordance with section 126 of the Clean Air Act, eight Northeastern States filed petitions requesting EPA to make findings and require decreases in nitrogen oxides (NOx) emissions from certain stationary sources in upwind States that may significantly contribute to ozone nonattainment problems in the petitioning State. In a related action, certain States were required to revise their State implementation plan (SIP) measures under EPA’s NOx SIP call to ensure that emissions reductions are achieved to mitigate the Regional Transport of Ozone across State boundaries in the eastern half of the United States. Further, Federal implementation plans (FIPs) may be required if any State fails to revise its SIP to comply with the final NOx SIP call. The Ozone Transport Assessment Group (OTAG) was a partnership between the EPA, the Environmental Council of the States and various industry and environmental groups which assessed the long-range transport of ozone and ozone precursors.

  Final Rule, Fact Sheet, Figures

Notice of Proposed Rulemaking (Public Announcement)

Notice of Proposed Rulemaking (Detailed Proposal Notice)

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