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U.S. EPA Revises Ozone NAAQS


On October 1, 2015, the U.S. Environmental Protection Agency (U.S. EPA) lowered the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb), from 75 ppb. For more information, including a version of the final rule, see:http://www3.epa.gov/ozonepollution/actions.html#stand.