Strategic Measure_HE.D.2 Number of Days Per Year in Which Ground Level Ozone Concentration Exceeds EPA Standard
The EPA standards used to measure compliance of air pollutants are the National Ambient Air Quality Standards (NAAQS). The standard for ground level ozone is 70 parts per billion (ppb). The ground level ozone standard is calculated by the annual fourth-highest daily maximum 8-hour concentration, averaged over 3 years. …