The Environmental Protection Agency (EPA) is making determinations under the Clean Air Act (CAA) that the Chicago, Illinois and Eagan, Minnesota nonattainment areas (hereafter also referred to, respectively, as the "Chicago area," "Eagan area," or "areas") have attained the 2008 lead (Pb) national ambient air quality standard (NAAQS or standard). These determinations of attainment are based upon complete, quality-assured, and certified ambient air monitoring data for the 2012-2014 design period showing that the areas have achieved attainment of the 2008 Pb NAAQS. Additionally, as a result of these determinations, EPA is suspending the requirements for the areas to submit attainment demonstrations, and associated reasonably available control measures (RACM), reasonable further progress (RFP) plans, contingency measures for failure to meet RFP, and attainment deadlines, for as long as the areas continue to attain the 2008 Pb NAAQS. This action does not constitute a redesignation of the areas to attainment of the 2008 Pb NAAQS; the areas remain designated nonattainment until such time as EPA determines that the areas meet the CAA requirements for redesignation to attainment and takes action to redesignate the areas.