Ozone Designations - 2015 Standards - Illinois State Recommendations and EPA Response

Ozone Designations for the 2015 Standards - Illinois

Scroll to the bottom for most recent documents. 

• Illinois State Recommendation (pdf) (41.99 KB)
• Illinois State Recommendation - Technical Support Document (pdf) (3.65 MB)
• EPA's Response to Illinois (pdf) (429.63 KB)
• EPA's Technical Support Document - Chicago (pdf) (1.64 MB)
• EPA's Technical Support Document (pdf) (2.14 MB)
• Illinois State Recommendation (April 26, 2018) (pdf) (22.06 KB)
• Final EPA Technical Support Document (Chicago, IL-IN-WI) (pdf) (4.34 MB)
• Final EPA Technical Support Document for St. Louis, MO-IL (pdf) (1.63 MB)
• May 2021 - Chicago, IL-IN-WI Nonattainment Area Final Area Designations for the 2015 Ozone National Ambient Air Quality Standards Technical Support Document (TSD) for Counties Remanded to EPA (pdf) (2.78 MB)
• May 2021 - St. Louis, MO-IL Nonattainment Area Final Area Designations for the 2015 Ozone National Ambient Air Quality Standards (NAAQS) Technical Support Document (TSD) (pdf) (1.72 MB)