Vehicle Emissions Inspection Requirements and Exemptions by State

Click on a state to view a pdf with more details.

image/svg+xml MA MN MT ND HI ID WA AZ CA CO NV NM OR UT WY AR IA KS MO NE OK SD LA TX CT NH RI VT AL FL GA MS SC IL IN KY NC OH TN VA WI WV DE MD NY PA NJ ME MI AK No Smog Requirements Smog Requirements DC

Clearing the Smog Law Haze

Everyone agrees that taking strides toward keeping our planet healthy is a noble cause, but how should the burden be shared?  Clean air is a national concern addressed by the EPA, but the laws governing how motor vehicle smog checks are performed, which vehicles are tested and how frequently is handled at the state and local level.  Maybe a daily driver needs an inspection every two years or so, but what about an infrequently driven collector car? Are the laws different for 3/4- or 1-ton trucks? And what if that truck is a diesel?  The SEMA Action Network (SAN) helps you keep track of smog check requirements in each state and the laws that exempt certain specialty vehicles.

The following information is current as of July 23, 2017 and is posted here for enthusiasts to learn more about vehicle emissions inspection laws in their states.  Please understand that state laws are subject to change, and it is important to consult the current statutes and regulations in your state to ensure accurate information.  You should not rely solely on the following information, and SEMA disclaims any responsibility for damages that arise out of reliance on the following information.  If you have further questions, please contact the SAN at san@sema.org.


AL | AK | AZ | AR | CA | CO | CT | DE | DC | FL | GA | HI | ID | IL | IN | IA | KS | KY 

LA | ME | MD | MA | MI | MN | MS | MO |MT | NE | NV | NH | NJ | NM | NY | NC | ND

OH | OKOR | PA | RI | SC | SD | TN | TX | UT | VA | VT | WA | WV | WI | WY

 

Alabama

None.

Alaska

Arizona

Arizona Revised Statues

§ 28-955. Mufflers; noise and air pollution prevention; emissions control devices; civil penalty; exception 

(a)  A motor vehicle shall be equipped at all times with a muffler that is in good working order and that is in constant operation to prevent excessive or unusual noise.

(b)  A person shall not use a muffler cutout, bypass or similar device on a motor vehicle on a highway.

(c)  The engine and power mechanism of a motor vehicle shall be equipped and adjusted to prevent the escape of excessive fumes or smoke.

(d)  Beginning with motor vehicles and motor vehicle engines of the 1968 model year, motor vehicles and motor vehicle engines shall be equipped with emissions control devices that meet the standards established by the director of environmental quality.

(e)  A person who violates this section is subject to a civil penalty of at least one hundred dollars.

(f)  This section does not apply to an electrically powered motor vehicle. 

Arkansas

None.

California

Currently, smog inspections are required for most vehicles every two years for registration renewal.

Diesel Vehicles:
All diesel vehicles 1998 model or newer or an GVWR of less than 14,000 lbs.

Exemptions:
1. Gasoline powered 1975-year model or older
2.  Electric
3.  Natural gas powered with a GVWR rating of more than 14,000 lbs.
4.  Owners of vehicles six or less model years old will pay an Annual Smog Abatement Fee for the first six registration years instead of being required to provide a biennial smog certification.

For more information visithttp://www.dmv.ca.gov/vr/smogfaq.htm#BM2543;http://www.bar.ca.gov/01_ConsumerActivities/01_GettingSmogged/index.html,

For information on Kit and Specially Constructed Vehicles visit: https://www.dmv.ca.gov/portal/dmv/detail/vr/spcnsreg

Colorado

Connecticut

Delaware

Florida

Georgia

Emissions if your vehicle is a 1993 – 2014 model year gasoline-powered car or light-duty truck (8,500 pounds gross vehicle weight rating or less) registered in Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gwinnett, Henry, Paulding or Rockdale County, it must be emissions tested. 

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles for the newest three (3) model years
2. Motor vehicles twenty-five (25) model years old and older
3. Vehicles with a GVWR of more than 8,500 lbs
4. Kit cars, hot rods, and gray market vehicles are provided with non-conforming status if they were granted non-conforming status before December 31, 1998.

For more information visit: http://www.cleanairforce.com/motorists/

Hawaii

Iowa

Illinois

Indiana

Kansas

Kentucky

Louisiana

Massachusetts

Maryland

Vehicles registered in 13 out of Maryland’s 18 counties and the city of Baltimore are required to undergo biennial emissions testing.

Counties: Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles, Frederick, Harford, Howard, Montgomery, Prince George’s, Queen Anne’s, and Washington

OBD testing is performed on vehicles model year 1996 and newer and an idle tailpipe and gas cap test is administered on model year 1977-1995 vehicles.

Diesel Vehicles:

Diesel vehicles are not tested for emissions.

Exemptions:

1. New vehicles for the first 24 months and qualified hybrids for the first 36 months after titling and registration
2. Pre-1977 model year vehicles
3. Vehicles with a GVWR of more than 26,000 lbs
4. Vehicles registered as Class N street rod vehicles
5.  Historic or Antique vehicles
6. Electric Vehicles
7. Vehicles registered to senior citizens over 70 or vehicles registered with hard metal disable tags and who drive 5,000 miles per year or less.
 

For more information visit:

 http://www.mva.maryland.gov/about-mva/info/58000VEI/58000-06T.htm#appendix_c

Maine

Michigan

Minnesota

Missouri

Mississippi

Montana

North Carolina

North Dakota

Nebraska

New Hampshire

New Jersey

Nevada

New York

Ohio

Oklahoma

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah

Virginia

Vermont

Washington

Wisconsin

Wyoming

District of Columbia