89 FR 26817
SIP Proposal: California (revisions to meet requirements for the 1997 eight-hour ozone NAAQS in the Riverside County nonattainment area).
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89 FR 26813
SIP Proposal: Arizona (revisions concerning emissions of volatile organic compounds, nitrogen oxides, particulate matter, and sulfur oxides for the Maricopa County Air Quality Department).
89 FR 26620
EPA proposed to revise the existing secondary sulfur dioxide NAAQS, to retain the existing secondary standards for nitrogen oxides and particulate matter, and to revise the data handling requirements for the proposed secondary sulfur oxide NAAQS.
89 FR 26115
SIP Proposal: Ohio (particulate matter rules).
Ohio v. Environmental Protection Agency
The D.C. Circuit upheld EPA's 2022 decision to reinstate a prior waiver of federal preemption of two California regulations concerning automobile emissions under the CAA. States and fossil fuel groups challenged the regulations—a standard limiting greenhouse gas emissions and a requirement that a ...
89 FR 25810
SIP Approval: Virginia (second maintenance plan for the 1997 eight-hour ozone NAAQS in the Fredericksburg area).
89 FR 25841
SIP Proposal: New Jersey (partial approval and partial disapproval of revisions to 2015 ozone infrastructure requirements).
89 FR 25838
SIP Proposal: Georgia (removal of requirement for enhanced Stage I gasoline vapor recovery systems at existing gasoline dispensing facilities in Catoosa, Richmond, and Walker Counties).
89 FR 25849
SIP Proposal: North Carolina (revision to approved motor vehicle emissions budgets).