EPA proposes tightening primary ozone standards to range of 65-70 ppb; final rule by October 2015
Green Car Congress
NOVEMBER 26, 2014
Counties where measured ozone is above proposed range of standards, based on 2011-2013 monitoring data. EPA last updated these standards in 2008, setting them at 75 ppb. Local communities, states, and the federal government have made substantial progress in reducing ground-level ozone. Source: EPA. Click to enlarge.
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