Level 2 Fire Restrictions in effect for western areas of Boulder County. No fireworks, fires, open flame, or shooting (see map and flyer).

Many County services are being offered online. Additionally, a variety of resources are available for those impacted by COVID-19.

Emissions Testing Requirements
Vehicle exhaust pipes and clean air

Emissions Requirements

Vehicles must pass an emissions inspection in order to be registered in Boulder County. Testing is required when a vehicle changes ownership (even if there is time left on the previous test) and for registration renewal, if indicated on the renewal notice.

The following vehicle types do not require emissions testing:

  • Motorcycles
  • All-electric vehicles
  • Gas-fueled or hybrid vehicles within the first seven model years
  • Diesel-fueled vehicles with GVWR under 26,000 pounds are exempt for the first four model years
  • Diesel-fueled vehicles with GVWR 26,000 pounds or more are exempt for the first six model years
  • Vehicles 1975 and older with collector plates
  • Kit cars
  • Horseless carriages
  • Vehicles registered as farm trucks
  • Vehicles registered as street rods

Testing requirements, locations, and exemptions for gas, hybrid, and alternative-fuel vehicles

Learn More

Testing requirements, locations, and exemptions for diesel vehicles

Learn More

There are three situations where emissions requirements may temporarily be extended or waived:

  1. Emissions Extension – for vehicles that are temporarily located out-of-state
  2. Hardship Waiver – for vehicles that have recently failed an emissions test and the owner is unable to obtain necessary repairs due to a financial hardship
  3. Repair Waiver – for vehicles that have failed an emissions test after undergoing emissions-related repairs

Out-of-State Emissions ExtensionFinancial Hardship/Repair Waiver

Contact Us

Motor Vehicle Division

Hours: 8 a.m. – 4:30 p.m. M-F

Phone: 303-413-7710

Fax: 303-413-7725 (Boulder office)
Fax: 303-413-7002 (Lafayette office)
Fax: 303-678-6126 (Longmont office)


Boulder: 1750 33rd Street
Map & Directions

Longmont: 529 Coffman Street
Map & Directions

Lafayette: 1376 Miners Drive
Map & Directions

Mailing Address

1750 33rd Street, Suite 100
Boulder, CO 80301