Short answer: Yes for most vehicles
| Emissions | Emissions test in the Chicago area (Cook, DuPage, Lake and parts of Kane, Kendall, McHenry and Will) and Metro East (parts of Madison, Monroe and St. Clair) for most 1996+ gasoline vehicles once they are four years old. The official test is free. |
|---|---|
| Safety | No periodic safety inspection for personal vehicles. |
| Official emissions test | Free Free of charge Source: Illinois EPA testing FAQ (PDF) |
| Find a station | Illinois Air Team testing locations |
Sources: Illinois EPA: Vehicle Emissions Testing Program · Illinois Air Team: Does my vehicle need to be tested?. Checked 2026-10-04.
Stations in Cook County
Use the official Illinois Air Team testing locations to find a licensed station near you.
Featured stations: none yet. Paid listings are labeled "Featured · paid placement".
Frequently asked
Do I need an emissions test in Cook County, Illinois?
Yes, for most covered vehicles. Emissions test in the Chicago area (Cook, DuPage, Lake and parts of Kane, Kendall, McHenry and Will) and Metro East (parts of Madison, Monroe and St. Clair) for most 1996+ gasoline vehicles once they are four years old. The official test is free.
Do I need a safety inspection in Cook County?
No periodic safety inspection for personal vehicles.