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Which counties require an emissions test to register a vehicle?
If you are unsure if a test is required in your area, please contact your local county motor vehicle office. If you have a question about whether you need a test in Adams, Arapahoe, Larimer, or Weld County contact your local DMV office at the number below.
Gas Program Area Map
AirCare Colorado has a tool to view the last two emission inspections on a particular gas vehicle.
Renewals are Exempt
with Collector Plates
without Collector Plates
1976-1981 = Annually
1976-1981 = $15.00
1982-1986 = Every two years
1982-1986 = $25.00
1976 or newer
1975 and older
*Vehicles model year 1976 or newer that have been registered as a "collector's item" prior to September 1, 2009, and the registration has never lapsed or expired.
1982-and-newer vehicles: An emissions test is required every two years for vehicles more than seven model years old. Your vehicle registration renewal postcard will state whether or not a test is required, or if your vehicle has qualified for the roadside emissions test. The fee is $25.
1981-and-older vehicles without collector plates: A two-speed idle test is required every year at an Air Care Colorado station or at an independent, licensed test station. The fee is $15.
Change of ownership: An emissions test is required when a vehicle is sold or its ownership changes. The seller is responsible or obtaining the test. A vehicle dealer may offer customers a voucher enabling the buyer to obtain a test. The dealer is responsible for repairing or repurchasing the vehicle if it fails the emissions test, but the consumer must return the vehicle to the dealer within 3 days of the purchase.
Commuters: Vehicles registered outside the region but driven into the nine-county area for 90 or more days per year for work or school must have an emissions test.
New MSO (Manufacturer Statement of Origin) vehicles purchased from a dealer are exempt from emissions testing for seven years.
Important Notice: Be sure your vehicle is due for an emissions test before going to an Air Care Colorado testing station.
State regulation requires testing stations to test all vehicles that are presented for testing. If you are not sure if your vehicle needs an emissions test, call the State Emissions Program at (303)205-5603.
Vehicles model years 1975 and older
Vehicles model years 1975-and-older can be registered as "collector's items" with no emissions inspection requirement or mileage restriction. However, if the vehicle is not specifically registered as a "collector's item," an emissions inspection is required every year.
Vehicles model year 1976 to 1984
Vehicles model year 1976 to 1984 that have been registered as a "collector's item" prior to Sept. 1, 2009, and the registration has never lapsed or expired, do not require an emissions inspection and there is no mileage restriction. If the vehicle has not previously been registered as a "collector's item," an emissions inspection is required every year.
Vehicles 32 years old
Vehicles at least 32 years old are eligible for "collector's item" registration. However, in order to register as a "collector's item," these vehicles will require an initial emissions inspection and then must be inspected every five years thereafter at the time of registration renewal. These vehicle have a mileage restriction limiting driving to no more than 4,500 miles per year. If the vehicle is being registered in a county that does not require an emissions inspection, only the mileage restriction applies.
Yes, as of January 2018, gasoline/electric hybrid vehicles model year 2011 and older are inspected.
The following fuel types require a test and can be tested at Air Care Colorado:
Vehicles 1982 and Newer
Vehicles 1981 and Older
How do I report a smoking vehicle?
If you have seen a vehicle emitting excessive smoke you may report it to the Colorado Department of Public Health and Environment by calling the smoking vehicle hotline at 303-692-3211 or via email at firstname.lastname@example.org