EPA Staff Revising Ozone Assessment, Opening Door To Tougher Limits

January 12, 2023
EPA staff is re-writing a draft policy assessment (PA) that is a key component of the agency’s reconsideration of national ambient air quality standards (NAAQS) for ozone, raising the possibility that EPA might opt to tighten the standards, and likely advancing the review faster as EPA seeks to avoid falling further behind schedule. In a Jan. 3 letter to the Clean Air Scientific Advisory Committee (CASAC), recently uploaded to the agency’s website, EPA Administrator Michael Regan says agency staff is...

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