Letter to EPA on “Once In Always In” Air Quality Policy November 13, 2023

Letter signed by PSR and other health groups in support of the U.S. Environmental Protection Agency taking action to review the 2020 Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act (MM2A) rule, and asking it to restore the Once-In Always-In policy, which was successful at improving air quality.


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