Gas Vehicles

Gas Emissions Program

Which counties require an emissions test to register a vehicle?

  • Boulder
  • Broomfield
  • Denver
  • Douglas
  • Jefferson
  • Portions of Adams
  • Portions of Arapahoe
  • Portion of Larimer
  • Portions of Weld

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.

  • Adams County (720) 523-6010
  • Arapahoe County (303) 795-4500
  • Larimer County (970) 498-7878
  • Weld County (970) 353-3840

AIR CARE COLORADO MAP AND PERTINANT INFORMATION

Gas Program Area Map

AirCare Colorado has a tool to view the last two emission inspections on a particular gas vehicle.

 

2021 emissions requirements for a gasoline vehicle


 

2021 Gas Emissions Requirements

Model Year

Gas or Hybrid

Frequency of Test

Testing Fee

2021

Exempt

n/a

n/a

2020

Exempt

n/a

n/a

2019

Exempt

n/a

n/a

2018

Exempt

n/a

n/a

2017

Exempt

n/a

n/a

2016

Exempt

n/a

n/a

2015

Renewals are Exempt

n/a

n/a

Need test if transfer of ownership

Every two years

$25.00

1988-2014

Need test

Every two years

$25.00

1976-1988

 

 

1976 - 1981 = $15.00

with Collector Plates

Need test

Every five years

1982 - 1987 = $25.00

1976-1988

 

  1976 - 1981 = Annually   

1976 - 1981 = $15.00

Without Collector Plates

Need test

  1982 - 1987 = Every two years

1982 - 1987 = $25.00

1976 or newer

 

 

 

Grandfathered*

Exempt

n/a

n/a

1975 and older with Collector Plates

Exempt

n/a

n/a

1975 and older without Collector Plates

Need test

Annually

$15.00

Horseless Carriage / Kit Cars / Electric Vehicles and Street Rods

No test needed

n/a

n/a

*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 or had a change of ownership.

 

  • 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.

 

Which vehicles are exempt from an emissions test?
  • Vehicles are exempt from an emissions test for the first seven model years. However, there is an exception.  If vehicle ownership is being transferred in the last year of the seven-year exemption, an emissions test will be required. For example, in 2021, an emissions test will be required if the ownership of a model year 2015 vehicle is being transferred.
  • Kit cars
  • All-electric vehicles
  • Motorcycles
  • Horseless carriages
  • Vehicles registered as street rods
Collector Vehicle

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.​

Does my hybrid require an inspection?

Yes, a law passed in, January 2015 that required Hybrid vehicles 8 years and older to pass an OBD emissions inspection. For example in,2021, gasoline/electric hybrid vehicles model year 2014,and older, will receive an OBD (On-Board Diagnostics) test.

Alternative-Fuel Vehicles

The following fuel types require a test and can be tested at Air Care Colorado:

  • Ethanol
  • Natural Gas
  • Propane
  • Methanol
  • Propane/gas
  • Methanol/gas
  • Natural gas/gas
  • Ethanol/gas
Where can I get a test?

Vehicles 1982 and Newer

1982 model-year vehicles and newer model-year vehicles require an emissions test every other year. Visit Air Care Colorado Test is $25 (Cash, Check, Visa, MasterCard, or Discover)

 

Follow this link to obtain Emissions Testing Facilities,https://aircarecolorado.com/index.php/

Vehicles 1981 and Older,

1981 model-year vehicles and older are required to have an emissions test performed each year. Visit Air Care Colorado or one of the independent stations listed below:   

Discount Auto Emissions

  • 3700 Federal Blvd, Denver, CO 80211
  • (303)458-6809
  • Test fee is $15 (Cash, Check, Visa, MasterCard, or Discover)
Econo Emissions &, Auto Service
  • 8330 E. Colfax Ave, Denver, CO 80220
  • (303)394-3196
  • Test fee is $15 (Cash, Check, Visa, MasterCard or Discover)
Seller and Dealer Requirements
The seller is required to provide the buyer with a passing emissions test at the time of sale. An emissions test that has been used previously for,the purpose of vehicle, registration cannot be transferred to the buyer.
Colorado dealers are required to provide a passing emissions test or a voucher good for one emissions test at the time of sale.
How do I renew my vehicle's registration
Obtain an emissions test if the statement "Emissions Test is Required" appears on the vehicle registration renewal notice
Submit the Certificate of Emissions Control (the bottom third of your passing emission test) with your registration fee to your county motor vehicle office. Check with your county for any additional requirements.
If you choose to register your vehicle online, you may access the registration website at: https://mydmv.colorado.gov/
Smoking Vehicle Hotline

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 cdphe.smokeline@state.co.us

 

 

 

 

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