Emissions Testing Updated September 23, 2017
Many states require that your vehicle undergo either a safety inspection or an emission controls system inspection, or both. If your car or truck has failed inspection, you are probably frustrated. The first thing you need to do is to read up on your state's laws and criteria for failing the test. It varies from state to state, and some of the problems that get flagged may be relatively easy to fix.
Other problems may require in-depth work by an automotive mechanic, but either way, you will need to understand the problems, fix them, and then get the vehicle reinspected and passed if you expect to license it for road use.
Your car may fail an inspection for something as simple as a dangling muffler, for example. Whether your car's OBD (on board diagnostics) system is showing a fault code or if it's your check engine light causing you to fail, you need to know what things need to be remedied and what to expect when you bring the car back for reinspection.
Also, if you are buying a car it is a good idea to first find out whether your state requires safety inspections. Many states have no inspection requirement at all, while others are very strict regarding this.
Following is a list of states and links to contact information pertaining to each state's vehicle emissions testing and safety inspection requirements:
Alabama - No Testing Required
Alaska - Testing No Longer Required
Arizona - for information visit
http://www.myazcar.com/
Arkansas - for information visit
https://www.adeq.state.ar.us/air/planning/ozone/cars.aspx
California - for information visit
https://www.smogcheck.ca.gov/Consumer/index.html?3
Colorado - for information visit
www.aircarecolorado.com/
Connecticut - for information visit
www.ctemissions.com/
Delaware - for information visit
www.dmv.de.gov/services/vehicle_services/reg/ve_reg_emissions.shtml
Florida - Testing No Longer Required
Georgia - for information visit
www.cleanairforce.com/
Hawaii - for information visit
www.dmv.org/hi-hawaii/car-registration.php
Idaho - Testing Required Only in Ada County - for information visit
www.emissiontest.org/
Illinois - for information visit
www.epa.state.il.us/air/vim
Indiana - for information visit
www.in.gov/bmv/2665.htm
Iowa - No Testing Required
Kansas - No Testing Required
Kentucky - No Testing Required
Louisisana - for information visit
www.lsp.org/lse_form4.html
Maine - for information visit
www.maine.gov/dep/air/mobile/enhancedautoinsp.html
Maryland - for information visit
www.mva.maryland.gov/MVA-Programs/VEIP/veipinfo.htm
Massachusetts - for information visit for more info visit
http://www.mass.gov/rmv/stations
Michigan - No Testing Required
Minnesota - No Testing Required
Mississippi - for information visit
https://www.dmv.com/ms/mississippi/emissions-testing
Missouri - for more information visit
www.dnr.mo.gov/gatewayvip
Montana - No Testing Required
Nebraska - for more information visit
www.dmv.ne.gov/dvr/mvtitles/inspect.html
Nevada - Some Areas Require Testing - for more information visit
www.dmvnv.com/emission_areas.htm
New Hampshire - for information visit
www.nh.gov/safety/divisions/dmv/registration/inspections-emissions/index.htm
New Jersey - for information visit
www.state.nj.us/mvc/Inspections/
New York - for information visit dmv.ny.gov/inspection/inspection-requirements
North Dakota - No Testing Required
Ohio - for information visit epa.ohio.gov/dapc/echeck/testing_info/tips_for_smooth_testing.aspx
Oklahoma - No Testing Required
Oregon - for information visit
http://www.dmv.org/or-oregon/smog-check.php
Pennsylvania - for information visit
www.drivecleanpa.state.pa.us/
Rhode Island - for information visit
www.dmv.ri.gov/inspections
South Carolina - No Testing Required
South Dakota - No Testing Required
Tennessee - for more info visit
http://www.state.tn.us/environment/apc/vehicle
Texas - for information visit
www.txdps.state.tx.us/rsd/vi/consumerinfo/emissionTesting.htm
Utah - for more info visit
http://dmv.utah.gov/safety-and-emissions-inspections#emission
Vermont - for information visit dmv.vermont.gov/safety/laws/emissions
Virginia - for information visit
www.dmv.virginia.gov/webdoc/citizen/vehicles/emissions.asp
Washington - for information visit
www.dol.wa.gov/vehicleregistration/emissions.html
Washington DC - for information visit
https://dmv.dc.gov/service/vehicle-inspections
West Virginia - No Testing Required
Wisconsin - Some Counties Require Testing - for information visit
www.dot.wisconsin.gov/drivers/vehicles/im.htm
Wyoming - No Testing Required