Wehrum Said To Favor Quick Ozone NAAQS Review Over Reconsideration

March 22, 2018
EPA air chief William Wehrum is said to be leaning against reconsidering the Obama-era decision to tighten the ozone national ambient air quality standard (NAAQS) from 75 parts per billion (ppb) to 70 ppb, instead aiming to speed up the next Clean Air Act-mandated NAAQS review as a potential vehicle to weaken the limit, sources say. Pursuing a regular review of the standard rather than reconsidering the science underpinning a prior review could make it easier for EPA to rely...


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