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Division of Air Pollution Control


Vehicle Inspection Program

Contact Air Pollution Control

Barry R. Stephens, Director
9th Floor, L & C Annex, 401 Church Street
Nashville, TN 37243-1531
(615) 532-0554
APC Contact List
Questions? Ask APC

Helpful Links

Vehicle Inspection Program Home
Williamson County CleanScreen Pilot Program
Williamson County CleanScreen Van Schedule
How To Renew Your Vehicle License
Emissions Testing Station Schedules
On-Board Diagnostics Testing Program
How To Apply For An Exemption
Important Facts To Know
Air Pollution Control Home

Questions About Vehicle Testing?

For Questions Including What To Do If You Fail Your Emissions Test:
Call the toll-free TDEC Vehicle Testing Information Hotline: 1-866-329-9632

For Questions Regarding Middle Tennessee and Hamilton County Testing Station Locations and Hours of Operation:
Call the Middle TN Envirotest Information Hotline: 615-399-8995
Or Call the toll-free Envirotest Information Hotline: 1-877-477-0800

Division Resources

APC Home
Air Quality Forecasting
Asbestos Information
EWS Landfill Monitoring (Camden)
General Information on Essex Group, Inc.
Ozone Early Action Compacts
PM 2.5
Public Participation Opportunities
Vehicle Inspection Program
Visible Emissions Evaluation (Smoke School)

How To Apply For A Vehicle Exemption

If you have a vehicle that is out of the State or the testing area when tags are due for renewal, you can apply for a vehicle exemption from the emissions testing requirement. To receive an exemption, a completed application form with documentation must be submitted to the Division of Air Pollution Control for processing.


When the vehicle returns to the testing area, you must have the vehicle tested, and pass an emissions test. Failure to do so may result in no future exemption being granted for the vehicle. For more details, you can call (615) 532-8378 or toll-free 1-866-329-9632.


Please review instructions before submitting your application form.


Application Form & Instructions