EPA Reclassifies Missouri Portion of St. Louis Nonattainment Area as Serious for 2015 Ozone NAAQS

Summary

The Environmental Protection Agency (EPA) has determined that the Missouri portion of the St. Louis, MO-IL bi-State nonattainment area failed to meet the 2015 ozone National Ambient Air Quality Standards (NAAQS) by the applicable attainment date, leading to its reclassification as