Canyon County


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Emissions Testing
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The Idaho Department of Environmental Quality has required that emissions testing begin June of 2010 in Canyon County.   If after reading the information provided below you still have comments, questions, or complaints please contact the Governor's office (334-2100) or the DEQ (373-0550).  The county  has no authority over any aspect of this program.  To see which of your representatives voted for this bill see House Bill No. 586

A completed emissions test will cost  $11.00.  Vehicles need to be emission inspected every other year.  Motorists will receive a notice in the mail when it is time to have their vehicle emissions inspected.

There is no need to obtain an inspection before the notice is received. 

How and Where

The Idaho Department of Environmental Quality has selected a contractor, Applus Technologies, Inc., to provide and maintain computerized inspection equipment to conveniently located automotive businesses throughout Canyon County and Kuna.  Each inspection system will be linked online to a central computer database to ensure that vehicle inspections are performed fairly and accurately.  Applus Technologies will also provide inspector training, customer support and other services to help make the inspection program effective and consumer friendly.

Motorists will have an opportunity to request an extension or exemption from the emission inspections requirements according to the program rules.  The forms can be found at

Notification of Emissions Test and Deadline

Motorists will be given no less than two notices to complete an emission test for their applicable vehicle before the registration is revoked. 

  • 1st notice will detail which vehicle needs testing and options to complete the test.  Motorists will have until the end of the designated month to complete the test.

  • 2nd notice will be sent at the end of the 30 day testing period reminding the motorist that they failed to complete the test and if they do not complete the test within the 35 days from the date of the notice their vehicle registration will be revoked by ITD.

Re-Registering a Vehicle that has had the Registration Revoked

In the event that the motorist fails to complete the test within the allotted time and fails to receive an approved waiver, exemption or extension - ITD will revoke the vehicle's registration.  After revocation, if the motorist completes a passing emissions test or receives an approved waiver, exemption or extension, the registration will be reinstated at no additional cost to the motorist. If the registration is revoked and expired, then the motorist will need to complete a passing emissions test or receive an approved waiver, exemption or extension in order to purchase a new or renew a registration.

About the Test

Vehicles will be tested for appropriate levels of volatile hydrocarbons (HC), carbon monoxide (CO), and carbon monoxide plus carbon dioxide (CO +CO2).  Two methods will be used: Two-Speed Idle (TSI) and On-Board Diagnostic (OBD).  The TSI method samples a vehicle's exhaust to see if it is above or below certain limits, while the OBD system looks for broken or malfunctioning emissions control components and systems.  The type of test required will depend on the age of the vehicle.  A snap acceleration test using a smoke meter at the end of the exhaust pipe will be used to test diesel vehicles.

When a Vehicle Fails the Emissions Test

Vehicles not passing the inspection will receive a vehicle inspection report with the reason(s) the vehicle is failing.  The inspection station that performed the initial test is not permitted, by state rules, to make repairs related to the emission test failure.  Motorists are free to select a qualified repair technician or repair the vehicles themselves.  See Possible Causes for Emission Test Failure

After appropriate repairs are made motorists are entitled to one free retest within 30 days of the initial inspection at any of the official vehicle inspection stations in Canyon County or Kuna.  When returning for a retest, 1981 - 1995 gasoline vehicles and all diesel vehicles will be subject to the entire anti-tampering and appropriate emissions test. 1996 and newer gasoline and 1998 and newer diesel vehicles will only be subject to the portion of the inspection for which the vehicle originally failed.  Vehicles subject to emissions inspection must pass the test before the deadline indicated in the official notice.  Not passing the test by the deadline will result in the vehicle's registration being canceled.

When a vehicle fails and appropriate repairs are conducted and the vehicle still does not pass, a Repair Waiver can be granted if a minimum of $200 has been spent towards failure related repairs.  Repairs for certain vehicles may be under warranty.

Motorists who want to dispute their emission inspection results may be able to obtain a free diagnostic and confirmatory testing service from Applus Technologies, Inc.  This free service will be offered by appointment only.  Applus Technologies will not repair the vehicle. 

Hardship Waiver

When a vehicle fails and the motorist can prove their income is at or below the current published poverty threshold as defined by the U.S. Department of Health and Human Services - Assistant Secretary for Planning and Evaluation they can apply for a hardship.  The following documentation is required to be granted a hardship status.

  • Completion of Hardship Waiver

  • Last two years of household Federal tax returns

  • If no Tax returns are available, provide entire household bills and paystubs for the past two months

  • If no income has changed substantially since submittal of last tax return (loss of job, etc.), motorists must provide a written description and documentation of current situation and inability to pay.

  • Other documentation identifying extenuating circumstances, which show a Hardship. i.e. Medical bills not covered by insurance, loss of unemployment benefits etc.

Vehicles Requiring Emissions Testing

  • Model Year 1981-1995 gas-powered vehicles, using the TSI method

  • Model year 1996 and newer vehicles more than five years old, using the OBDII method

  • Model year 1981-1997 diesel-powered vehicles, using the snap acceleration method

  • Model year 1998 and newer diesel vehicles more than five years old, using the OBD method

Vehicles Exempt from Testing

  • Electric or hybrid motor vehicles

  • Motor vehicles with a model year less than five years old

  • Motor vehicles with a model year older than 1981

  • Classic automobiles as defined by Idaho Code

  • Motor vehicles with a maximum vehicle gross weight of less than 1,500 pounds

  • Motor vehicles registered as motor homes as defined by Idaho Code

  • Motorized farm equipment

  • Registered motor vehicles engaged solely in the business of agriculture

Vehicle Exemption Form

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