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Vehicle Inspection Program

Contact Air Pollution Control

Barry R. Stephens, Director
William R. Snodgrass Tennessee Tower
312 Rosa L. Parks Avenue, 15th Floor
Nashville, TN 37243
(615) 532-0554
APC Contact List
Questions? Ask APC

Vehicle Inspection Links


Vehicle Testing Questions?

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 andHours of Operation:
Call the Middle TN Envirotest
Information Hotline: 615-399-8995
Or Call the toll-free Envirotest
Information Hotline: 1-877-477-0800

EFFECTIVE APRIL 1, 2005, Gasoline and Diesel Vehicles with a GVWR up to 10,500 lbs. must pass an emissions test prior to registration renewal if registering in Hamilton, Davidson, Rutherford, Sumner, Williamson or Wilson Counties.

Davidson County

If you have a vehicle registered in Davidson County, go to Metro Public Health Department of Nashville/Davidson County, Vehicle Inspection.

Shelby County

If you have a vehicle registered in Shelby County, go to City of Memphis, Motor Vehicle Inspection Bureau.
Shelby County offers online registration.

Hamilton, Rutherford, Sumner, Williamson and Wilson Counties

If you have a vehicle registered in Hamilton, Rutherford, Sumner, Williamson, or Wilson County, see testing information and station schedules

IMPORTANT INFORMATION: The State of Tennessee developed more restrictive regulations to control air pollution from mobile sources in counties that were not meeting the new 8-hour ozone Federal Standards for air quality. As a result, certain vehicles registered in Hamilton, Davidson, Rutherford, Sumner, Williamson and Wilson counties are required to pass a vehicle emission test. Gasoline and diesel vehicles with a model year of 1975 and newer and a Gross Vehicle Weight Rate (GVWR) of 10,500 lbs or less must pass an emission test before the vehicle’s registration can be renewed. Motorcycles are exempt.

Inspection programs such as the one implemented in Tennessee have proven to be very beneficial in reducing harmful ozone air pollution. Emissions from an individual car are generally low, relative to the smokestack image many associate with air pollution. But in numerous cities across the country, the personal automobile is the single greatest polluter, as emissions from millions of vehicles on the road add up. Driving a private car is probably a typical citizen’s most "polluting" daily activity. Ozone levels in many cities have been reduced with the introduction of lower volatility gasoline, and as newer cars with improved emission control systems replaced older models. There has been significant progress in reducing vehicle emissions, but the number of cars on the road and the miles they travel make mobile sources an ongoing problem. Unless we dramatically reduce the amount of pollution vehicles emit in actual use, or drastically cut back on the amount we drive, smog-free air may become a problem for many of our cities. Our Thanks to those driving clean vehicles, and helping us keep our air clean for this and future generations.

**Effective July 1, 2002, 1996 and newer model vehicles will undergo an Onboard Diagnostics test, and a gas cap leak check instead of the traditional tailpipe and tampering test.

Some Important Facts

You should know that . . .

Due to Safety Considerations your vehicle may not be tested if:

• It has fuel, oil or coolant leaks
• It has visible smoke
• It has excessive exhaust leaks
• The idle is not set to factory specifications
• The inspector would have to reach more than an elbow length under the vehicle to insert the sampling probe.

Your vehicle will undergo a 2 point tampering check prior to the emissions test. The emission control devices subject to inspection are:

• a catalytic converter (Only if your vehicle was manufactured with a catalytic converter)
• and a fuel gas cap

If you fail the emissions test, the Department has an ASE certified mechanic on staff to assist you. He provides free diagnostic information and can help determine why the vehicle is not passing. If you are registered in Hamilton, Rutherford, Sumner, Williamson, or Wilson county please call 532-8378 or toll-free 1-866-329-9632 for more information.

You can have your vehicle tested at any station regardless of where the vehicle is registered.

The last week in the month is the busiest. Emission tests are good for 90 days, so come early and save yourself some time.

The overall average waiting time at stations is approximately 5 minutes.

• Tuesdays and Wednesdays continue to be unusually high volume inspection days compared to the rest of the week.
• Thursday or Friday afternoon, and Saturday’s are the best times to visit a station, unless it happens to be the end of the month.

The cost of an inspection is only $10.00. No checks or bills over $20.00 accepted.