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).
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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).
National Parks Conservation Ass'n v. United States Department of the Interior
A district court granted in part and denied in part summary judgment for a conservation group in a challenge to the National Park Service's (NPS') delayed implementation of a marine reserve zone and commercial fishing phaseout in Biscayne National Park in Florida. The group argued NPS violated the A...
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 ...