• 22 S. State St. Clearfield, UT 84015
  • Main : (801) 525-5000
  • M-F 8am to 5pm

Vehicle Emissions Information

Emissions Inspection Requirements

Vehicles registered in Davis County, less than six (6) years old, are required to have an emissions test once every two (2) years. Any vehicle older than six (6) years old, and that is model year 1968 or newer for non-diesel vehicles, or 1998 and newer diesel vehicles, must receive an emissions test yearly.  Diesel vehicles 1997 & older and Heavy Duty Diesels (>14,000lbs GVWR) are exempt from emissions testing.

Visit the Utah Department of Motor Vehicles (DMV) website for information and assistance with vehicle registration renewals.

Emissions Inspection Locations

All vehicles may be tested at any permitted station.  To find an approved testing location near you, visit the Aircheck Davis County  "Find an Inspection Station" webpage.

Financial Assistance for Repairing or Replacing Failing Vehicles

The Vehicle Repair and Replacement Assistance Program (VRRAP) provides financial assistance toward the repair or replacement of vehicles that are unable to pass current emission standards. Financial assistance can be awarded to individuals with household incomes at or below 300% of the federal poverty guidelines. Visit our VRRAP webpage for more information.

Emissions Test Waivers

Under some instances of financial hardship, you may be eligible to obtain a one year, Certificate of Waiver that will allow you to register your vehicle despite it failing emissions testing. In order to qualify for a Certificate of Waiver, you must show proof that you have spent money on repairs. Repairs must have been performed no more than 60 days prior to an official test failure, and the repairs must have been appropriate to the cause of the test failure.

The dollar amount required to be spent on emissions-related repairs in order to qualify for a waiver is:

  • $450.00 for 1996 and newer model year vehicles;
  • $350.00 for 1984 - 1995 model year vehicles;
  • $250.00 for 1968 - 1980 model year vehicles; and
  • $1,500.00 for heavy duty diesel vehicles.

Please be aware, a vehicle will not be eligible for a Certificate of Waiver if it:

  • has missing emission control components;
  • has had a waiver previously in its lifetime; or
  • has any visible emissions (smoking).

Out-of-State Vehicle Registration

An emissions deferral may be requested for vehicles that are located out-of-state, and cannot not be tested in Utah.  To request an emissions deferral the Out of State Emissions Deferral Application must be submitted to the Department along with any required documentation.

Registering a Vehicle Purchased in a County That Does Not Require Emissions Testing

A TC-820 form is required in order to register a vehicle in Davis County that was purchased without obtaining an emissions test. Davis County still requires an emissions test be completed on these vehicles. Vehicle owners are notified that they must receive a passing emissions test within 10 days of returning to Davis County. The results of the emissions test must be submitted to:

Davis County Environmental Health Division
Davis County Health Department PO Box 618 Farmington, UT 84025

Farm Truck Registration

A truck with a GVWR of 12,000lbs or less may be exempted from an emissions inspection if you submit a completed Farm Truck Plate Application to the Department. In order to qualify, you must own or operate a farm that is located on agricultural property with a minimum of 5.25 acres, and the vehicle must be used exclusively to transport farm products or supplies.

This plate is issued to a farm vehicle used exclusively to transport farm products or supplies and is only issued to trucks. To qualify for a farm plate you must have at least 5.25 acres of owned or leased property. If this requirement is met, submit the parcel number for the property to Davis County Vital Records located at  22 South State Street in Clearfield, Utah. 

Becoming a Permitted Davis County Emissions Inspector

To become a permitted inspector, applicants must complete an online training course and written exam, followed by an in person practical exam at the Technical Center.  To sign up for the online course, register through Davis Technical College and pay the $100 course fee.  Upon completion of the online course and exam, further instructions are given on how to schedule and complete the practical exam and receive ones permit.

Prospective inspectors can review these inspection demonstration videos to help prepare for the practical exam:

For further information, call 801-525-4975.