Federal Implementation Plans for Purposes of Reducing Interstate Ozone Transport

Reducing the Regional Transport of Ozone (RTO) and ozone precursors (including nitrogen oxides or NOx) is necessary to help certain States attain the health standards for ground-level ozone (smog). 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. Federal implementation plans (FIPs) may be needed if any State fails to revise its SIP to comply with the final NOx SIP call.

Notice of Proposed Rulemaking (Detailed Proposal Notice)

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