Indiana Emissions Test

Through Clean Air Car Check, Indiana checks gas and hybrid cars in 2 counties. Model years 1976 to 2022 are the ones covered in 2026. Odd model years are checked in odd calendar years; even model years go in even calendar years, with 2 years between visits.

Update: A 2026 Indiana law asks EPA to stop testing in Lake and Porter counties by year's end; the test stays required until then.

What cars have to be tested?

In 2026, the green band marks which model years Indiana tests. A car is exempt if it's one of the 4 newest model years. A car 25 years or older can be exempt if it has collector insurance.

Look up your car by model year and fuel.

Indiana emissions test at a glance

Program	Clean Air Car Check
Where	2 counties: Lake County, Porter County
Fuels tested	Gas, hybrid
Model years tested in 2026	1976 to 2022
How often	Due every 2 years: cars with odd model years test in odd years, and even model years test in even ones
The test	An emissions test plus a tampering check
Fee	Free at Clean Air Car Check stations
New cars	The 4 newest model years are exempt
Older cars	Exemption possible for cars 25 years or older that carry collector insurance
Waiver	Each car gets one waiver in its lifetime, covering one test cycle, with the original repair receipts required

How the test works, and what if the car fails?

A failed test comes with a report that lists the problem. Fix the problem first, then return for another test.

Indiana offers a waiver if the car still fails after repairs: each car gets one in its lifetime, it covers a single test cycle, and the original repair receipts are required.

See what failed · Fix it, sell, or get a waiver?

Indiana rules: the source pages