Car Inspection in IllinoisPage Overview
Illinois Vehicle Emissions Test
Illinois requires most vehicles in certain areas of the state to undergo smog and emissions testing by the state's Environmental Protection Agency (EPA) every two years. (Check our "Illinois Vehicles Exempt from Emissions Testing" section below.) You'll receive a notice when it's time to get your vehicle smog checked.
On this page you'll find an overview of Illinois emissions testing program.
The State of Illinois oversees the Vehicle Emissions Testing Program. You'll receive a notice in the mail when it's time to get your vehicle smog checked.
When it's time to have your vehicle checked, drive it to your nearest emissions inspection station. Bring your test notice, if you have it. The results of the test will be automatically transmitted to the Illinois Secretary of State and the EPA.
Note that the type of test varies based on the type and age of your vehicle. Check the EPA's FAQ section for more details.
REMEMBER: While many states penalize drivers who don't bring in their vehicles for emissions testing by making it impossible and illegal to register and operate the vehicle, Illinois takes things a step further by suspending your driver's license.
Vehicles Subject to Emissions Testing
Most gasoline-powered cars model year 1996 or newer are subject to emissions testing after they turn 4 years old. Heavy-duty trucks manufactured in 2007 or later are also subject to testing if they weigh between 8,501 lbs. and 14,000 lbs.
Failing the Emissions Test
If your vehicle fails its emissions test, you'll need to try to get the associated problems repaired and return to the station for a retest.
The Illinois EPA provides a repair shop finder on its website that allows you to locate a recognized repair facility near you.
After an emissions test failure, your emissions test facility will provide you with information that will help you get the necessary repairs completed.
First, all diesel-powered vehicles and vehicles powered exclusively by electricity are exempt from emissions testing. (See "IL Incentives for Eco-Friendly Driving" below.)
(For more information about green-driving incentives, check our section on Green Driver State Incentives in Illinois.)
Second, certain ZIP codes throughout the following counties are exempt from testing:
- St. Clair.
Understand, that doesn't mean ALL vehicles in these counties are exempt; just the areas under certain ZIP codes. Check the Illinois EPA website for specific ZIP code information.
NOTE: All vehicles in the Counties of Cook, Dupage, and Lake must undergo smog testing, regardless of ZIP code.
As mentioned above, you don't have to bring in your vehicle for emissions testing if it is a diesel-powered vehicle or one powered exclusively by electricity.
There are other eco-friendly driving perks, too. For more information on how you can save money on auto insurance, federal tax credits, and more, visit our page on green driver incentives.
Reducing Emissions Pollution
Illinois doesn't currently have a program for reporting gross polluters or smoking vehicles, but you can be proactive by reducing your own impact on the environment. See the Illinois EPA's green tips to find out how you can do more to reduce pollution.Local Smog Check Stations
Choose a County
- De Kalb
- De Witt
- Du Page
Other Topics in This Section
- Jo Daviess
- La Salle
- MC Donough
- MC Henry
- MC Lean