Home › Emissions testing › Davis County

Davis County emissions testing rules for 2026

What Davis County requires before you can renew your registration, which vehicles are exempt, what a test costs, and who to call.

Which model years need a test in 2026

Davis County's page says vehicles six years and older that are model year 1968 or newer (gas) or 1998 or newer (diesel) must test every year. The DMV table shows 1995 and older as not required. If your vehicle is a 1968 to 1995 model, confirm with the county. (Source: Davis County Health Department; Utah Division of Motor Vehicles)

Exempt vehicles

• New vehicles with an MSO
• Electric vehicles
• Motorcycles
• Off-highway and farm vehicles
• Custom vehicles
• Diesel vehicles with a GVWR over 14,001 lbs
• Diesel vehicles model year 1997 and older

Exemptions as listed by the Utah DMV and the county. (Source: Utah Division of Motor Vehicles; Davis County Health Department)

What a test costs

Davis County does not publish a station price cap on its emissions page. Ask the station for its posted price.

Failed in Davis County? Waivers and repair help

Davis County may issue a one-year Certificate of Waiver under financial hardship if you have already spent a minimum amount on emissions-related repairs within 60 days before an official failure: $450 for 1996 and newer, $350 for 1984 to 1995, $250 for 1968 to 1980, and $1,500 for heavy-duty diesels. Vehicles with missing emission parts, a catalyst monitor that is not ready, a prior waiver, or visible smoke do not qualify. The county also lists the Vehicle Repair Assistance Program (VRAP) and EVRAP for repair or replacement help. (Source: Davis County Health Department)

Cities in Davis County

Layton, Bountiful, Kaysville, Clearfield, Farmington, Syracuse.

What to do if you fail · How the test ties to registration

FAQ