{"id":85482,"date":"2023-06-30T04:55:16","date_gmt":"2023-06-30T11:55:16","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=85482"},"modified":"2023-09-08T21:37:08","modified_gmt":"2023-09-09T04:37:08","slug":"what-you-need-to-know-about-state-emissions-testing","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-you-need-to-know-about-state-emissions-testing\/","title":{"rendered":"What You Need To Know About State Emissions Testing"},"content":{"rendered":"\nReading Time: <\/span> 3<\/span> minutes<\/span><\/span>\n\n\n

Vehicle emissions have a lot of negative effects on the environment. Modern emissions laws try to ensure vehicles today have cleaner emissions than ever. One way to monitor this is through emissions testing<\/a>.<\/p>\n\n\n\n

What Is Emissions Testing?<\/h2>\n\n\n\n

Emissions testing, also known as smog testing, measures your vehicle’s emissions and the accuracy of the onboard computer when tracking the pollutants the vehicle is releasing. The tests review the levels of carbon dioxide (CO2), carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and other gases that your vehicle produces.<\/p>\n\n\n\n

Licensed inspection stations for emissions testing can be found in select repair shops and dealerships, as well as dedicated emissions testing centers.<\/p>\n\n\n\n

Why Do Vehicles Need Emissions Tests?<\/h2>\n\n\n\n

Emissions tests are often mandatory in particularly polluted areas to ensure the air quality doesn’t continue to deteriorate. The US government implemented the Clean Air Act in 1990, which set pollution-level requirements for states and local municipalities. The areas that didn’t reach these requirements were ordered to implement mandatory vehicle emissions testing as a  result.<\/p>\n\n\n\n

\"emissions
Emissions testing or smog testing measures your vehicle’s emissions and the accuracy of the onboard computer when tracking the pollutants the vehicle is releasing.<\/figcaption><\/figure>\n\n\n\n

Types of Emissions Tests<\/h2>\n\n\n\n

There are different types of emissions tests out there, and states with emissions testing often have different types available. However, these two particular tests are the most common and will show up in most states:<\/p>\n\n\n\n

Onboard Diagnostic (OBD ) Inspection<\/h3>\n\n\n\n

The OBD II inspection is usually conducted on vehicles made from 1996 onwards. This test takes information from your vehicle’s internal emissions diagnostic system and verifies its accuracy. It also makes sure the onboard computer isn’t flagging any problems in the emissions systems<\/a> or the related components.<\/p>\n\n\n\n

Acceleration Simulation Mode (ASM) Test<\/h3>\n\n\n\n

The ASM test is a type of tailpipe test conducted on older vehicles manufactured from 1995 and earlier. It’s also used for vehicles without an OBD-II installed. During the test, a tailpipe sensor is used alongside a dynamometer, which is basically a treadmill for cars. The vehicle then runs at a steady speed while its emissions are measured. The acceptable limits for these emissions are adjusted based on the weight of the vehicle.<\/p>\n\n\n\n

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What States Require Emissions Testing?<\/h2>\n\n\n\n

Now, you’ll likely notice that there are a number of states without required emissions testing in their laws. You can find out what states require smog tests here:<\/p>\n\n\n\n

State<\/strong><\/td>Requirement<\/strong><\/td><\/tr>
Alabama<\/td>Select cities and municipalities only<\/td><\/tr>
Alaska<\/td>Not required<\/td><\/tr>
Arizona<\/td>Initial registration for drivers residing in or commuting into Tucson and Phoenix

Annually for registration renewal for drivers residing in or commuting into Tucson and Phoenix<\/td><\/tr>
Arkansas<\/td>Not required<\/td><\/tr>
California<\/a><\/td>Initial registration

Every two years<\/td><\/tr>
Colorado<\/td>Every two years in counties under the Automobile Inspection and Readjustment (AIR) Care Program <\/td><\/tr>
Connecticut<\/td>Every other year<\/td><\/tr>
Delaware<\/td>Biannually

When acquiring a new vehicle title<\/td><\/tr>
Florida<\/td>Not required<\/td><\/tr>
Georgia<\/td>Annually in select counties for gasoline cars or light-duty trucks (weighing 8,500 lbs or less) made between 1994 and 2014<\/td><\/tr>
Hawaii<\/td>Not Required<\/td><\/tr>
Idaho<\/td>Before registration in the Treasure Valley Airshed (City of Kuna and Ada and Canyon counties)<\/td><\/tr>
Illinois<\/td>Select municipalities that don’t meet federal air quality standards<\/td><\/tr>
Indiana<\/td>Initial registrations

Biannually for vehicle owners in Porter and Lake counties<\/td><\/tr>
Iowa<\/td>Not required<\/td><\/tr>
Kansas<\/td>Not required<\/td><\/tr>
Kentucky<\/td>Not required<\/td><\/tr>
Louisiana<\/td>Every two years for vehicles in certain parishes and cities

Vehicles of new Louisiana residents

Vehicles with a break tag or emission sticker about to expire

Upon registration with the Office of Motor Vehicles

When ordered by a Louisiana law enforcement officer<\/td><\/tr>
Maine<\/td>Required for residents of Cumberland County<\/td><\/tr>
Maryland<\/td>Vehicles of new Maryland residents

Every two years for all Maryland-registered vehicles<\/td><\/tr>
Massachusetts<\/td>Annually<\/td><\/tr>
Michigan<\/td>Not required<\/td><\/tr>
Minnesota<\/td>Not required<\/td><\/tr>
Mississippi<\/td>Not required<\/td><\/tr>
Missouri<\/td>Every two years for gasoline vehicles made in 1996 or later and diesel vehicles made in 1997 or later that weigh under 8,500 lbs

Every time the vehicle’s title is transferred<\/td><\/tr>
Montana<\/td>Not required<\/td><\/tr>
Nebraska<\/td>Not required<\/td><\/tr>
Nevada<\/td>Initial registration

Annually for registration renewal<\/td><\/tr>
New Hampshire<\/td>Initial registration

Annually for registration renewal<\/td><\/tr>
New Jersey<\/td>Every two years and for initial registrations<\/td><\/tr>
New Mexico<\/td>Annual and initial registration in Bernalillo County <\/td><\/tr>
New York<\/td>Initial registration

Annually for registration renewal<\/td><\/tr>
North Carolina<\/td>Vehicles in certain counties before their registration renewal deadline<\/td><\/tr>
North Dakota<\/td>Not required<\/td><\/tr>
Ohio<\/td>Every two years for certain counties<\/td><\/tr>
Oklahoma<\/td>Not required<\/td><\/tr>
Oregon<\/td>Every two years for vehicle owners in Portland and Medford<\/td><\/tr>
Pennsylvania<\/td>Initial registration <\/td><\/tr>
Rhode Island<\/td>Within 5 days of original registration

Every two years for gasoline passenger vehicles that weigh less than 8,500 lbs<\/td><\/tr>
South Carolina<\/td>Not required<\/td><\/tr>
South Dakota<\/td>Not required<\/td><\/tr>
Tennessee<\/td>Initial registration in select counties

Annually before registration renewal in select counties<\/td><\/tr>
Texas<\/td>Annually in select counties and areas<\/td><\/tr>
Utah<\/td>Every two years in select counties for vehicles less than six years old

Annually before registration in select counties for vehicles more than six years old<\/td><\/tr>
Vermont<\/td>Initial registration

Annually for registration renewal<\/td><\/tr>
Virginia<\/td>Initial registration in select counties and cities

Every two years for registration renewal in select counties and cities<\/td><\/tr>
Washington<\/td>Initial registration for certain vehicles in select counties

Every two years for certain vehicles in select counties<\/td><\/tr>
Washington DC
(District of Columbia)<\/td>		Initial registration

Every two years for registration renewal for vehicles made in 1968 and later

Annually for most commercial and free-for-hire vehicles<\/td><\/tr>
West Virginia<\/td>Not required unless part of the annual safety inspection<\/td><\/tr>
Wisconsin<\/td>Initial registration and every two years for registration renewal<\/td><\/tr>
Wyoming<\/td>Not required<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

As you can see, there are still a good number of states without smog check laws in place. Those that do have these laws often require that the checks be conducted around a vehicle’s registration period. Be sure to check the rules in your area to make sure you aren’t missing any required tests.<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"

Reading Time: <\/span> 3<\/span> minutes<\/span><\/span>Vehicle emissions have a lot of negative effects on the environment. Modern emissions laws try to ensure vehicles today have… Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":85564,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[267],"tags":[],"ppma_author":[2607,3269],"class_list":{"0":"post-85482","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-guides","8":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"\nWhat You Need To Know About State Emissions Testing - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Emissions testing is handy for checking if your vehicle is in good working order. 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