By October 1, 2016, the governor of each state must recommend designations of attainment, nonattainment, or unclassifiable under the 2015 eight-hour ozone standard for all areas of the state. The 2015 ozone standard is exceeded with a design value greater than 70 ppb, measured over a three-year period. Based on certified air monitoring data for 2015, four areas in Texas are not meeting the revised ozone standard: Dallas-Fort Worth (DFW), HoustonGalveston-Brazoria (HGB), San Antonio (SA), and El Paso (ELP).
