The cases listed below appear in the most recent issue of ELR's Weekly Update. For cases previously reported, please use the filter on the left.
Volume 56, Issue 19
No(s). 25-5129 (9th Cir. Jul 2, 2026)
The Ninth Circuit, 2-1, affirmed summary judgment for the South Coast Air Quality Management District in a challenge to the district's 2022 rule phasing in zero nitrogen oxide (NOx) emission standards on certain appliances over the next decade to comply with CAA obligations.
No(s). 24-1050 (D.C. Cir. Jun 26, 2026)
The D.C. Circuit denied petitions to review a 2024 EPA rule that revised the NAAQS for fine particulate matter from 12 µg/m³ to 9 µg/m³.
No(s). 25-977 and 25-2041 (2d Cir. Jun 30, 2026)
The Second Circuit affirmed two district court rulings in challenges to laws enacted in New York City and New York State that effectively prohibit use of fossil fuel-powered appliances in new buildings.
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