EPA Reclassifies Areas in Midwest as Serious Nonattainment for 2015 Ozone NAAQS

Summary

The Environmental Protection Agency (EPA) has determined that eight areas in Illinois, Indiana, Michigan, Ohio, and Wisconsin failed to meet the 2015 ozone National Ambient Air Quality Standards (NAAQS) by the applicable attainment date, leading to reclassification as 'Serious' nonattainment areas by January 16, 2025.