Judge gives EPA deadline to issue PM2.5 designations

By Alex Guillén | 07/20/2026 01:38 PM EDT

The Trump administration has been dragging its feet on implementing the Biden-era standard, which recently survived legal challenges.

One of the Guardians of Traffic on the Hope Memorial bridge is seen in the foreground, as smoke from Canadian wildfires blankets downtown Cleveland in Friday, July 17, 2026.

One of the Guardians of Traffic on the Hope Memorial Bridge is seen in the foreground, as smoke from Canadian wildfires blankets downtown Cleveland on July 17. Sue Ogrocki/AP

A federal judge Friday ordered EPA to act relatively quickly to decide which parts of the U.S. do not meet the 2024 particulate matter standard.

Those decisions — on which the Trump administration had been dragging its feet — will require EPA to act by Feb. 7 and trigger additional deadlines for states with poor air quality to curb pollution.

The ruling comes as much of the U.S. faces air quality alarms due to soot from Canadian wildfires, though the currently choked skies from the Midwest to the East Coast won’t factor into EPA’s decision-making here, which is based on air quality through 2025.

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The order from Judge Haywood Gilliam Jr. of the U.S. District Court for the Northern District of California firmly rejected arguments from EPA that it shouldn’t be forced to act right now, and in any event would need another year and a half to get the job done.

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