EPA Retains Obama-Era Ozone NAAQS, Rejects Push For Reconsideration

EPA has decided against reconsidering the Obama-era decision to tighten the ozone national ambient air quality standard (NAAQS) from the 2008 limit of 75 parts per billion (ppb) down to 70 ppb, opting instead to consider the issue as part of an expedited review of the 2015 standard that the agency is slated to conclude in October 2020. The decision was not unexpected, as Inside EPA had reported that EPA air chief William Wehrum was said to favor focusing instead...