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D.C. Circuit Keeps 9-µg PM2.5 Rule, Blocking EPA Rollback

6/27/2026

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Summary

Story summary

A three-judge D.C. Circuit panel unanimously rejected the EPA’s request to rescind the 2024 fine-particle rule that caps pollution at 9 micrograms per cubic meter.
The EPA said the rule would cost hundreds of millions to billions of dollars and exceeded its authority.
Earthjustice and the Natural Resources Defense Council praised the ruling, saying it will prevent hundreds of thousands of asthma cases and thousands of premature deaths.

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Story summary

A three-judge D.C. Circuit panel unanimously rejected the EPA’s request to rescind the 2024 fine-particle rule that caps pollution at 9 micrograms per cubic meter.
The EPA said the rule would cost hundreds of millions to billions of dollars and exceeded its authority.
Earthjustice and the Natural Resources Defense Council praised the ruling, saying it will prevent hundreds of thousands of asthma cases and thousands of premature deaths.