Emission Control:Smog Emission Requirements Per State

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 information contained herein is current as of March 20, 2011. Please be advised that these state laws and regulations are subject to change. Please consult the current statutes and regulations for your state of interest to ensure the accuracy of the information contained within this volume.
MightyRam50.net disclaims any responsibility for any claims that might result from reliance on the contents of the material.

ALABAMA
None.
ALASKA
Emissions inspections are performed at the local level by the Municipality of Anchorage. Vehicles are only tested if they are registered in Fort Richardson, Elmendorf AFB, Indian, Chugiak, Eagle River, Girdwood and Eklutna or within the Municipality of Anchorage. Emissions inspections are normally required for vehicles biennially at registration renewal. The emissions inspection program in the Fairbanks North Star Borough (FNSB) was discontinued on January 1, 2010. Kit Cars, show cars, grey market vehicles, vehicles that have undergone engine change, and other non-standard vehicles may need to be tested by a referee in the Anchorage area. Visit http://doa.alaska.gov/dmv/reg/imtest.htm and http://anchoragereferee.org/ for more information.
Diesel Vehicles:
Diesel vehicles are subject to a one-time per owner emissions inspection.
Exemptions:
1. New vehicles for the newest six (6) model years
2. Pre-1968 model year vehicles
3. Gasoline-powered motor vehicles with an unladen weight of 12,001 pounds or heavier
4. Vehicles registered as "historic" or "custom collector" vehicles with current, valid special registration and plates
ARIZONA
Emissions inspections are required for vehicles registered in the metro Phoenix area (Area A) and the metro Tuscon area (Area B) and must be inspected for emissions no more than 90 days prior to registration. Registration renewal applications issued by the MVD will include the statement “Emission Test Required” when the vehicle is required to be tested. Visit http://www.azdot.gov/mvd/RegRenewal/RenewalInfo.asp, http://www.azdeq.gov/environ/air/vei/, and http://www.myazcar.com/ for more information.
Diesel Vehicles:
Diesel vehicles are required to be tested annually, but are provided with the same exemptions as gasoline powered vehicles. Visit http://www.azdeq.gov/environ/air/vei/diesel.html for more information on diesel requirements.
Exemptions:
1. New vehicles for the newest five (5) model years (reconstructed vehicles are NOT included in this exemption)
2. Pre-1967 model year vehicles (a new pre-1975 model year exemption is effective pending EPA approval--check back for updates!)
3. Vehicles registered as “collectible” with collectible vehicle insurance
ARKANSAS
None.
CALIFORNIA
Emissions (smog) inspections are required for all vehicles registered in the state of California, with vehicles registered in areas subject to the biennial smog certification program required to undergo testing for every other registration renewal. Vehicles in these areas are exempted for the newest six registration model years (excepting diesels), but are required to pay an annual “smog abatement fee” during those years. Visit http://www.dmv.ca.gov/vr/smogfaq.htm#BM2543, http://www.bar.ca.gov/01_ConsumerActivities/
01_GettingSmogged/index.html, and http://dmv.ca.gov/vr/spcns.htm for more information.
Diesel Vehicles:
Diesel vehicles model year 1998 and newer with a GVWR of 14,000 lbs or less are required to be tested, and are not provided with the same “new car” exemption as gasoline powered vehicles.
Exemptions:
1. New vehicles for the newest six (6) model years (must pay an annual "smog abatement" fee)
2. Pre-1976 model year vehicles
3. Vehicles registered as “specially constructed” that have received an emissions waiver
Image of an Emission Info Sticker Placed Under the Hood of a California Vehicle - 1986 Mitsubishi Mighty Max
http://www.mightyram50.net/vbulletin...1&d=1368118657
COLORADO
Emissions inspections are conducted in the Denver Metropolitan area and surrounding counties. A two-speed idle test is required for pre-1982 model year vehicles, while an I/M 240 test is required for model year 1982 and newer vehicles. This test expanded into parts of Larimer and Weld Counties in November of 2010. Visit http://www.aircarecolorado.com/about...er/exemptions/ and http://www.colorado.gov/cs/Satellite...MV%2FRMVLayout for more information.
Diesel Vehicles:
Diesel vehicles are required to undergo emissions testing in the Denver Metropolitan area and surrounding counties, as well as in Weld, Larimer and El Paso counties and are exempted for their newest four (4) model years. Whether the test is required every year or every other year depends on the vehicle's model year and weight.
Exemptions:
1. New vehicles for the newest four (4) model years (unless there is a change in ownership in that four year period, at which time the vehicle would require an emissions test, or if the vehicle was previously registered in a part of Colorado without emissions testing or in another state, the vehicle will only be exempted for the newest three model years)
2. Pre-1976 vehicles registered as collector vehicles
3. Pre-1943 vehicles registered as horseless carriage vehicles
4. Vehicles with a two-stroke engine manufactured prior to 1980
5. Kit cars
6. Vehicles registered as street rods
7. Customs, reconstructed, rebuilt, and gray market vehicles must be evaluated by an emissions technical center prior to bringing the vehicle into an emissions testing station. The evaluation paperwork should be saved for future emissions tests.
CONNECTICUT
Emissions inspections are to be conducted when registering a vehicle for the first time and when purchasing a used vehicle. Other emissions inspections are conducted based on a testing cycle and the state notifies vehicle owners of an upcoming test date far in advance of when the test is to be conducted. Visit http://www.ctemissions.com/exempt.html for more information.
Diesel Vehicles:
Diesel vehicles are required to be tested in the same manner as gasoline powered vehicles and are provided with the same exemptions.
Exemptions:
1. New vehicles for the newest four (4) model years
2. Motor vehicles twenty-five (25) model years old and older
3. Vehicles with a GVWR of more than 10,000 lbs
4. Vehicles registered as composite vehicles
5. Vehicles registered but not designed primarily for highway use
DELAWARE
Emissions inspections are required for vehicles being registered or titled for the first time in Delaware and biennially based on their model year (during registration renewals). Visit http://www.dmv.de.gov/services/vehic...missions.shtml for more information.
Diesel Vehicles:
Model year 1997 and newer diesel-powered vehicles are required to be tested in New Castle and Kent Counties.
Exemptions:
1. New vehicles for the newest five (5) model years
2. Pre-1968 model year vehicles and pre-1970 model year light-duty trucks in New Castle and Kent Counties
3. Pre-1968 model year vehicles in Sussex County
3. Vehicles with a GVWR of more than 8,500 lbs
4. All historic vehicles, kit cars or antique vehicles displaying antique vehicle registration plates in Sussex County
5. Vehicles manufactured and registered as kit cars in New Castle and Kent Counties
DISTRICT OF COLUMBIA
Emissions inspections are required for vehicles prior to registration and every two years thereafter.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles are exempt from the initial inspection, but are required to display the inspection sticker that is provided by the DMV upon initial titling/registration
2. Pre-1968 model year vehicles
FLORIDA
None.
GEORGIA
Emissions inspections are required for vehicles registered in Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gwinnett, Henry, Paulding and Rockdale Counties and are tested at the time that the vehicle is registered or re-registered. Visit http://www.cleanairforce.com/docs/Wh..._2012FINAL.pdf and http://www.cleanairforce.com/motoris...exemptions.php for more information.
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 and must only meet the exhaust emissions standards for 1975 model year vehicles and pass a two-speed idle inspection
5. Kit cars newly registered in an enhanced inspection area after December 31, 1998 must have all required emission control systems for the model year shown on the vehicle’s registration card; the model year is the year listed in the vehicle registration database maintained by the Georgia Department of Motor Vehicle Safety
6. Hot rods are not eligible for non-conforming status if registered for the first time in an enhanced inspection area after December 31, 1998 and must adhere to the EPA policy on engine switching; vehicles which do not have the original engine are considered to be the model year of the vehicle's chassis [Ga. Comp. R. & Regs. r. 391-3-20-.03(6)]
7. Gray market vehicles newly registered in an enhanced inspection area after December 31, 1998 must apply for non-conforming status
HAWAII
None.
IDAHO
Vehicles registered in Ada County and Canyon County are required to undergo emissions testing for registration and registration renewal. Visit http://www.idahovip.org/ or http://www.emissiontest.org/faq.htm for more information.
Diesel Vehicles:
Diesel vehicles are required to be tested in the same manner as gasoline powered vehicles and are provided with the same exemptions.
Exemptions:
1. New vehicles for the newest four (4) model years
2. Pre-1981 model year vehicles
3. Vehicles registered with “Old-Timer” and “Classic” plates
4. Vehicles with a GVWR of less than 1,500 lbs
5. Vehicles with a GVWR of greater than 14,000 lbs
6. In Canyon County, a vehicle that has undergone an engine change is considered the model year of the chassis or the engine, whichever is newer
ILLINOIS
Vehicles registered in specific ZIP codes in the Northeastern Illinois and Metro-East St. Louis areas are subject to testing every two years. Visit http://www.epa.state.il.us/air/vim/faq/exempt.html for more information.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles for the newest three (3) model years
2. Pre-1968 model year vehicles
3. Vehicles registered as antiques, expanded use antiques, customs and street rods
4. Vehicles operated exclusively in organized amateur or professional sporting activities as defined in the Environmental Protection Act (415 ILCS 5/1 et seq.); Race Car/Show Car affidavits are available at test stations, the affidavit must be resubmitted every two years to retain the exemption
5. Vehicles of model year 1995 or before that were in compliance with the Illinois Vehicle Emissions Inspection Law on February 1, 2007
6. Vehicles operated exclusively for parade or ceremonial purposes by any veterans, fraternal, or civic organization, organized on a not-for-profit basis
INDIANA
Vehicles registered in Lake County and Porter County (Chicago metropolitan area) are required to undergo emissions testing biennially. Visit http://www.in.gov/bmv/2655.htm, http://www.cleanaircarcheck.com/abou...ns_testing.php and http://www.cleanaircarcheck.com/waiv...exemptions.php for more information.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles for the newest four (4) model years
2. Pre-1976 model year vehicles
3. Kit cars and dune buggies that meet established criteria for a “Specialty Exemption”; specialty exemptions must be applied for and granted every two years
4. Show cars that meet established criteria for a “Show Car Exemption”; show car exemptions must be applied for and granted every two years
5. Ceremonial vehicles
6. Vehicles with a GVWR of more than 9,000 lbs
IOWA
None.
KANSAS
None.
KENTUCKY
None.
LOUISIANA
Vehicles registered in the five-parish area around Baton Rouge consisting of Ascension, East Baton Rouge, Iberville, Livingston, and West Baton Rouge parishes are subject to emissions testing during an annual combined safety/emissions inspection. Visit http://www.deq.louisiana.gov/portal/...0/Default.aspx for more information.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles for the newest two (2) model years
2. Pre-1980 model year vehicles
3. Vehicles with a GVWR of more than 10,000 lbs
4. Vehicles with antique registration and plates
MAINE
Vehicles registered in the Cumberland County are subject to annual emissions testing that is performed at the same time as the state’s safety inspection. The emissions inspection includes an equipment check, a gas cap pressure test for 1974 and newer vehicles and an Onboard Diagnostics (OBD) inspection for 1996 and newer vehicles.
Diesel Vehicles:
Only diesel vehicles with a GVWR of more than 18,000 lbs are tested for emissions.
Exemptions:
1. Vehicles with antique registration and plates
MARYLAND
Vehicles registered in 13 out of Maryland’s 18 counties and the city of Baltimore are required to undergo biennial emissions testing. 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. Visit http://www.mde.state.md.us/programs/Air/MobileSources/
VehicleEmissionsInspectionProgram/AboutOurProgram/Pages/index.aspx and http://www.mva.maryland.gov/MVA-Prog...IP/default.htm for more information.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles for the newest two (2) model years
2. Pre-1977 model year vehicles
3. Vehicles with a GVWR of more than 26,000 lbs
4. Vehicles registered as Class L historic vehicles
5. Vehicles registered as Class N street rod vehicles
MASSACHUSETTS
Massachusetts performs an OBD emissions test annually on model year 1998 and newer vehicles. Vehicles manufactured before model year 1998 no longer receive tailpipe emissions tests, but fail their safety inspections if they produce visible smoke. Visit http://massvehiclecheck.state.ma.us/...basicinfo.html for more information.
Diesel Vehicles:
Diesel vehicles are required to undergo emissions testing based on their weight and model year. Pre-1984 diesel vehicles are exempt. Pre-1997 (or 15 or more model years old) light duty diesel vehicles and pre-2007 (or 15 or more model years old) medium duty diesel vehicles are exempt.
Exemptions:
1. New vehicles being registered in their first model year
2. Vehicles 15 years old and older
3. Pre-1996 model year light duty vehicles
4. Medium duty (weighing 8,501 to 14,000 pounds GVWR) vehicles manufactured before model year 2008 and medium duty vehicles 15 years old or older
5. Heavy duty vehicles not equipped with an OBD or that are 15 years old or older
6. As of April 30, 2011, street rods and custom vehicles
7. Specially constructed and replica vehicles until April 30, 2012, at which time they will be tested based on the model year of the engine installed
MICHIGAN
None.
MINNESOTA
None.
MISSISSIPPI
None.
MISSOURI
Missouri requires biennial emissions testing (combined with the state’s biennial safety inspection) on vehicles registered in the St. Louis ozone nonattainment area, which includes St. Louis City and Franklin, Jefferson, St. Charles and St. Louis counties. Visit http://dor.mo.gov/motorv/help.php#emissions and http://www.dnr.mo.gov/gatewayvip/ for more information.
Diesel Vehicles:
Diesel vehicles must undergo OBD emissions testing in the same way as gasoline powered vehicles. Pre-1997 model year diesel vehicles are exempt.
Exemptions:
1. Pre-1996 model year vehicles
2. Certain new vehicles (see http://www.dnr.mo.gov/gatewayvip/v-o...est.htm#exempt for details)
5. Vehicles registered as historic vehicles
4. Specially constructed vehicles
5. Kit cars
6. Vehicles driven fewer than 12,000 miles between biennial safety inspections (must submit a mileage based exemption request)
7. Vehicles with a GVWR of over 8,500 lbs
MONTANA
None.
NEBRASKA
None.
NEVADA
Nevada requires emissions testing on vehicles registered in Clark County (Las Vegas) and Washoe County (Reno) before the vehicle can be registered or its registration renewed. Visit http://www.dmvnv.com/emission.htm for more information.
Diesel Vehicles:
Diesel vehicles with a GVWR of 14,000 or less must undergo emissions testing, but are provided with the same exemptions provided to gasoline powered vehicles.
Exemptions:
1. New vehicles for their first and second registration
2. Pre-1968 model year vehicles
3. Vehicles registered as replicas
4. Vehicles registered as old timers, classic rods or classic vehicles that are driven 5,000 miles or less per year
NEW HAMPSHIRE
New Hampshire requires emissions testing on vehicles that are model year 1996 and newer with a GVWR of 8,500 lbs and less.
Diesel Vehicles:
Model year 1997 and newer diesel vehicles with a GVWR of 8,500 lbs or less must undergo emissions testing.
Exemptions:
1. Pre-1996 model year vehicles
2. Vehicles with a GVWR of more than 8,500 lbs
3. Vehicles 20 model years old or older
4. Street rods, if equipped with an engine manufactured prior to the year 1996 (new engines, as specified by the manufacturer, built to replicate older model vehicle engines, shall be considered to be the year of the engine being replicated)
6. Replicas, if equipped with an engine manufactured prior to the year 1996 (new engines, as specified by the manufacturer, built to replicate older model vehicle engines, shall be considered to be the year of the engine being replicated)
NEW JERSEY
New Jersey requires emissions testing every two years. Visit http://www.state.nj.us/mvc/Inspectio...clesExempt.htm for more information.
Diesel Vehicles:
Light duty (8,500 lbs or less) diesel powered vehicles model year 1997 and later are required to undergo diesel emissions testing.
Exemptions:
1. New vehicles for the newest five (5) model years
2. Vehicles registered as “historic vehicles”
3. Vehicles that qualify for the designation “Collector Motor Vehicle” (visit http://www.state.nj.us/mvc/Vehicle/c...r_vehicles.htm for more information)
4. The model year of vehicles that have undergone an engine change is based on the chassis type and model year of the motor vehicle, not on the engine model year
NEW MEXICO
New Mexico requires emissions testing at the time of registration for vehicles registering in Bernalillo County.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles sold by a dealer with a MCO document
2. Pre-1975 model year vehicles
3. Vehicles with a GVWR of more than 26,000 lbs
NEW YORK
New York requires annual emissions testing in conjunction with the state’s annual safety inspection. Vehicles that weight 8,500 lbs or less which are model year 1996 or newer must undergo an OBD-II inspection. Vehicles manufactured prior to 1996 are subject to a low enhanced inspection.
Diesel Vehicles:
Diesel-powered vehicles that weigh more than 8,500 lbs. and are registered in the New York Metropolitan Area (NYMA) counties of Nassau, Suffolk, Rockland, Westchester, and the five counties within New York City, are subject to annual emissions inspection.
Exemptions:
1. New vehicles for the newest two (2) model years
2. Vehicles that are 26 model year old or older
3. Vehicles registered with historical plates
4. Homemade vehicles or custom vehicles are required to be tested, but only must pass a gas cap inspection
NORTH CAROLINA
North Carolina requires OBD emissions inspections annually in 48 counties. The inspections are performed in conjunction with the state’s safety inspections and must be performed prior to a vehicle’s registration or registration renewal. Visit http://www.ncdot.org/dmv/vehicle/reg...on/inspection/ and http://www.ncdot.gov/dmv/vehicle/title/vehicles/ for more information.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. Current model year vehicles
2. Pre-1996 model year vehicles
3. Vehicles that are 35 model years old or older
4. Vehicles with a GVWR of 8500 pounds and greater
NORTH DAKOTA
None.
OHIO
Ohio requires emissions tests for vehicles every other year in Cuyahoga, Geauga, Lake, Lorain, Medina, Portage, and Summit counties (Cleveland Metropolitan area), Franklin County (Columbus), and Hamilton County (Cincinnati). Even model year vehicles must be tested during even-numbered years and odd model year vehicles must be tested during the odd-numbered years.
Diesel Vehicles:
Diesel vehicles must undergo emissions testing in the same way as gasoline powered vehicles, and are provided with the same exemptions provided to gasoline powered vehicles.
Exemptions:
1. New vehicles for the newest four (4) model years
2. Vehicles that are 26 model year old or older
3. Vehicles with a GVWR of more than 10,000 lbs
4. Vehicles registered as “historical” or “collector” vehicles
5. Parade and exhibition vehicles
OREGON
Oregon’s Department of Environmental Quality requires emissions testing in the Portland and Medford metropolitan areas prior to registration and as a part of the registration renewal process.
Diesel Vehicles:
Diesel vehicles in the metropolitan areas of Portland and Medford with a GVWR of 8,500 lbs or less are required to undergo emissions testing, but are provided with the same exemptions provided to gasoline powered vehicles in those area.
Exemptions:
1. Pre-1975 model year vehicles (Portland)
2. Vehicles that are 21 model year old or older (Medford)
PENNSYLVANIA
Pennsylvania requires emissions inspections annually the counties of Allegheny, Beaver, Berks, Blair, Bucks, Cambria, Centre, Chester, Cumberland, Dauphin, Delaware, Erie, Lackawanna, Lancaster, Lebanon, Lehigh, Luzerne, Lycoming, Mercer, Montgomery, Northampton, Philadelphia, Washington, Westmoreland and York. The emissions inspection is to be completed before or with the annual safety inspection.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles with less than 5,000 miles on the odometer is exempt for one year after the first registration.
2. Pre-1975 model year vehicles
3. Vehicles with a GVWR of more than 9,000 lbs
4. Vehicles registered as classics, antiques, collectibles, street rods, and specially constructed.
RHODE ISLAND
Rhode Island requires biennial emissions inspections to be conducted in conjunction with safety inspections.
Diesel Vehicles:

Light duty diesel powered vehicles weighing 8500 pounds or less are tested for emissions at 25 stations throughout Rhode Island that are equipped to perform diesel inspections. Heavy duty diesel powered vehicles (weighing over 8500 pounds) must be inspected annually at an "A" Class inspection station.
Exemptions:
1. New vehicles for first (2) model years or 24,000 miles, whichever comes first
2. Vehicles registered as antiques
3. Motor vehicles 25 years old or older must undergo inspection for safety and emissions, but are not failed if they do not pass emissions standards
4. Vehicles insured as classic vehicles may receive an alternate type of inspection.
5. Vehicles manufactured as kit cars may receive an alternate type of inspection.
6. Reconstructed and homemade vehicles are inspected for emissions compliance using the standards and test procedures applicable for exhaust emission, functional emissions control devices, and visual inspection for each individual vehicle - based on the engine year of the engine installed in the vehicle
7. Vehicles with exchanged engines are inspected for emissions compliance based on the chassis model year of the vehicle, but if the engine is newer than the chassis model year, the emissions inspection is based on the model year of the engine
SOUTH CAROLINA
None.
SOUTH DAKOTA
None.
TENNESSEE
Annual emissions inspections must be passed prior to registration and registration renewal in the counties of Hamilton, Davidson, Rutherford, Sumner, Williamson and Wilson and in the city of Memphis.
Diesel Vehicles:
Diesel vehicles are treated the same as gasoline powered vehicles for emission inspection purposes.
Exemptions:
1. Pre-1975 model year vehicles
2. Vehicles with a GVWR of more than 10,500 lbs
3. Vehicles with antique registration and plates
TEXAS
Annual emissions inspections must be passed prior to registration and registration renewal in the counties of Brazoria, Fort Bend, Galveston, Harris, Montgomery, Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, Travis, Williamson and El Paso.
Diesel Vehicles:
Diesel vehicles are not tested for emissions.
Exemptions:
1. New vehicles for the newest two (2) model years
2. Vehicles with antique registration and plates
3. Vehicles 25 years old or older
UTAH
All vehicles registered in Davis, Salt Lake, Utah and Weber counties with model years less than six years old are required to have an emission test once every two years. Vehicles in this category that have even-numbered model years must have an emission test in even-numbered years, and vehicles that have odd-numbered model years must have an emission test in odd-numbered years. Vehicles with model years six years old and older (to 1967) must have an emission test every year.
Diesel Vehicles:
Diesel vehicles are treated the same as gasoline powered vehicles for emission inspection purposes.
Exemptions:
1. New Vehicles with an MSO
2. Pre-1968 model year vehicles
3. Vehicles registered as "vintage vehicles" or "custom"
VERMONT
On-board diagnostic systems (OBD) on 1996 and newer vehicles are checked as part of Vermont’s annual vehicle safety inspection.
Diesel Vehicles:
Diesel vehicles with a GVWR of 8,500 lbs or less with a model year of 1997 or newer are required to undergo emissions testing.
Exemptions:
1. Pre-1996 model year vehicles
2. Vehicles with a GVWR of more than 8,500 lbs
VIRGINIA
Annual emissions inspections are required for vehicles registered in the counties of Arlington, Fairfax, Loudoun, Prince William, and Stafford and cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park and must be passed prior to vehicle registration and registration renewal.
Diesel Vehicles:
All 1997 model year and newer diesel powered vehicles with a gross vehicle weight rating up to and including 8,500 pounds are required to undergo emissions inspections.
Exemptions:
1. New vehicles being titled for the first time for the first two years of registration
1. A vehicle with a model year of 25 years old or older
2. Vehicles with a GVWR of more than 10,000 lbs
WASHINGTON
Washington requires emissions testing in the year that a vehicle license is to expire (every other year) in certain zip codes within Clark, Snohomish, Spokane, King and Pierce counties. A test is also required for a transfer of ownership of a vehicle, unless the vehicle was tested within 365 days of the transfer.
Diesel Vehicles:
Diesel vehicles under 8,501 lbs GVWR with two-wheel or part-time four wheel drive receive a smoke opacity test, the vehicle is also tested on a dynamometer. Diesel vehicles under 8,501 lbs GVWR with constant 4x4 (all wheel drive) or traction control receive a smoke opacity test, but the vehicle will not be driven on a dynamometer and will instead undergo a two-speed idle test. Diesel vehicles over 8,500 lbs GVWR receive a snap acceleration test, a smoke opacity test and a two-speed idle test (are not tested on a dynamometer).
Exemptions:
1. Motor vehicles that are less than five years old or more than 25 years old
2. Motor vehicles that are a 2009 model year or newer
WEST VIRGINIA
None.
WISCONSIN
Emissions inspections are required for vehicles registered in Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington and Waukesha counties of Wisconsin every other year at the time of license plate renewal. Vehicles more than five model years old require inspection within 45 days following registration by a new owner.
Diesel Vehicles:
All 2007 model year and newer diesel powered vehicles with a GVWR of up to 14,000 lbs are required to undergo emissions inspections.
Exemptions:
1. New vehicles for the newest three (3) model years in
2. New vehicles for the first five (5) model years in in New Castle and Kent Counties
1. Pre-1996 model year vehicles
2. A motor vehicle of a model year of 2006 or earlier that has a GVWR exceeding 8,500 pounds, and a motor vehicle of a model year of 2007 or later that has a GVWR exceeding 14,000 pounds
WYOMING
None.

Street Rod/Custom Vehicle Legislation http://www.semasan.com

SEMA has produced model legislation to create titling and registration classifications for street rods and custom vehicles, including kit cars and replicas. Under the SEMA model, eligible vehicles are titled as the production year they most closely resemble, are required to meet the equipment standards for that model year and are exempt from periodic vehicle inspections and emissions inspections.

SEMA.jpg