Search results with tag "Ozone air quality standards"

Ozone Air Quality Standards: EPA’s 2015 Revision

Ambient Air Quality Standards (NAAQS) for ground-level ozone3 from the then-current level of 75 parts per billion (ppb) to 70 ppb. The revised standards are based on a review of 2,300

  Standards, Quality, 2015, Revisions, Ozone, Ambient, Ambient air quality standards, Ozone air quality standards, Epa s 2015 revision