Cobb County Tax Commissioners Office

Emission Testing

Pursuant to Georgia law, the Cobb County Tax Commissioner enforces emissions testing requirements prior to issuing tags or renewal decals; however, program requirements, regulations and rules are the sole responsibility of Georgia’s Clean Air Force. Questions or concerns pertaining to this program should be directed to them via phone at 1 (800) 449-2471 or through their website,

Effective January 1, 2024, in Cobb County, passing vehicle emissions tests are required for 2000 – 2021 model year gasoline-powered cars and light-duty trucks (8,500 lbs gross vehicle weight rating or less). The three most recent model year vehicles are exempt from emissions testing in 2024 include all 2022 and newer model-year vehicles (2022, 2023 and 2024).

2000 - 2021 model year vehicles that are newly acquired or recently moved into the county must have proof of passed inspection within the last 12 months and must be registered within 30 days (seven days if purchased from a non-registered dealer). 

Possible Exemptions


Vehicle Year: All vehicle model years 1998 and older are exempt from emissions testing.


Senior Exemption: The vehicle owner must be 65 years old or older, the vehicle must be 10 model years old or older, and the vehicle must be driven less than 5,000 miles per year. You may apply for this exemption either through Georgia’s Clean Air Force online form or through your local tag office.


Out-of-Area Extension: Available for vehicle owners who meet all requirements (the requirements can be found at; vehicle must be tested upon return to the area. Vehicles can be tested well in advance if the driver will be out of the area at the time of registration. You must apply through and be approved by Georgia’s Clean Air Force before renewing or applying for a new tag. 


Repair Waiver: Available if emission-related repairs meet or exceed the Repair Waiver limit amount (changes year-to-year); other qualifications based on vehicle model year apply. You must apply through and be approved by Georgia’s Clean Air Force before renewing or applying for a new tag.

Inspection Cost  

A test costs up to $25; for more details please visit Stations must post the testing fee on their official GCAF sign.