Illinois at a glance Emissions test in some counties
| Safety inspection | No periodic safety inspection for personal vehicles. |
|---|---|
| Emissions test | 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. |
| Official emissions test | Free Free of charge Source: Illinois EPA testing FAQ (PDF) |
| Find a station / office | Illinois Air Team testing locations |
Official sources: Illinois EPA: Vehicle Emissions Testing Program · Illinois Air Team: Does my vehicle need to be tested?. Checked 2026-10-04.
Counties with an emissions test (10)
Kane, Kendall, McHenry, Will, Madison, Monroe and St. Clair are only partly covered (by ZIP code).
- Cook CountyRules, fee and stations
- DuPage CountyRules, fee and stations
- Lake CountyRules, fee and stations
- Kane CountyRules, fee and stations
- Kendall CountyRules, fee and stations
- McHenry CountyRules, fee and stations
- Will CountyRules, fee and stations
- Madison CountyRules, fee and stations
- Monroe CountyRules, fee and stations
- St. Clair CountyRules, fee and stations
Everywhere else in Illinois: no emissions test for personal vehicles.
Frequently asked
Does Illinois require a vehicle safety inspection?
No periodic safety inspection for personal vehicles.
Does Illinois require an emissions test?
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.
Which counties are covered?
Cook County, DuPage County, Lake County, Kane County, Kendall County, McHenry County, Will County, Madison County, Monroe County, St. Clair County. Kane, Kendall, McHenry, Will, Madison, Monroe and St. Clair are only partly covered (by ZIP code).