Fort Collins emissions testing locations and hours
Fort Collins does not operate its own municipal emissions testing facility. Instead, the city relies on private testing stations licensed by the Colorado Department of Public Health and Environment (CDPHE) to perform emissions inspections. These stations are scattered across Fort Collins and the surrounding area, and you can find current locations through the CDPHE's online station locator or by calling 303-692-3633.
Most private testing stations in Fort Collins operate during standard business hours — typically 8 a.m. to 5 p.m. on weekdays, with some offering limited Saturday hours. A few stations stay open until 6 or 7 p.m. on weekdays to accommodate working drivers. Hours vary by location, so calling ahead or checking the station's website before you visit saves a wasted trip.
The CDPHE locator tool lets you search by ZIP code and shows which stations are currently accepting vehicles. Some stations may temporarily close for equipment maintenance or staffing, so the locator reflects real-time availability rather than a static list.
Key Takeaways
- Fort Collins emissions testing is performed at private stations licensed by Colorado's Department of Public Health and Environment, not at a city-run facility.
- You can find current testing station locations and hours through the CDPHE online locator or by calling 303-692-3633.
- Testing typically costs between $20 and $30 per vehicle, though prices vary slightly by station.
- Bring your vehicle registration and photo ID; the test itself takes 10 to 20 minutes once you are in the testing bay.
- If your vehicle fails, you have 60 days to repair it and retest at no additional charge at the same station.
What happens during a Fort Collins emissions test
The emissions test in Fort Collins follows Colorado's standard protocol, which varies slightly depending on your vehicle's model year and type. For most passenger vehicles, the test is a tailpipe test that measures the exhaust coming from your car's muffler. The technician will drive your vehicle onto a dynamometer (a machine with rollers that simulate driving) or perform a simpler idle test, depending on the station's equipment and your vehicle's age.
The entire process usually takes 10 to 20 minutes. You will need to provide your vehicle registration and a photo ID. The technician will record your vehicle's odometer reading, VIN, and license plate, then run the test. You will receive a printed result when ready — either a pass, a fail, or a conditional pass (which means your vehicle barely passed and may fail next time).
If you pass, the test is valid for two years from the date of the test. If you fail, the station will give you a detailed report showing which emissions standards your vehicle did not meet. You then have 60 days to repair the vehicle and return to the same station for a retest at no additional cost.
Cost and payment methods at Fort Collins stations
Emissions testing in Fort Collins costs between $20 and $30 per test, depending on the station. Most private stations charge on the lower end of that range, though a few charge slightly more. The price is the same whether you pass or fail on your first attempt; the retest within 60 days is free.
Nearly all Fort Collins testing stations accept cash, debit cards, and credit cards. A few smaller stations may accept cash only, so calling ahead if you do not carry cash is worth doing. Some stations may offer a small discount if you pay in cash, though this is not standard practice.
If you are retesting after a repair, bring your original test report or failure notice. The station will use it to verify that you are retesting the same vehicle and that you are within the 60-day window.
When Fort Collins requires emissions testing
Colorado requires emissions testing for most vehicles registered in the Fort Collins area, with some exceptions. Vehicles model year 1981 and older are exempt. Vehicles model year 1982 through 1996 are tested every two years; vehicles 1997 and newer are tested every two years as well, though the specific testing protocol may differ slightly.
New vehicles (model year of current year or previous year) are exempt for their first four years of registration. After that, they enter the regular testing cycle. Diesel vehicles have different testing requirements than gasoline vehicles, so confirm your vehicle type when you call the station.
Your vehicle registration notice will indicate whether testing is required. If it does, you must complete testing before your registration expires. Driving without a current, passing emissions test when one is required can result in registration suspension and fines.
What to do if your vehicle fails the test
A failure means your vehicle's emissions are above Colorado's limits for one or more pollutants. The test report will specify which standards were not met — for example, nitrogen oxides (NOx), particulate matter, or hydrocarbons. This information helps a mechanic diagnose what repair is needed.
You have 60 days from the test date to repair your vehicle and return to the same station for a free retest. During those 60 days, you can still drive your vehicle, but you cannot renew your registration until you pass. If you cannot complete repairs within 60 days, you can request a one-time extension from the CDPHE, though this requires paperwork and is not automatic.
Common repairs that lead to passing retests include replacing a faulty oxygen sensor, fixing a loose gas cap, replacing a clogged air filter, or addressing issues with the catalytic converter. A mechanic familiar with emissions repairs can often diagnose the problem from the test report alone.
Preparing your vehicle for testing
Before you take your vehicle to a Fort Collins testing station, a few straightforward steps can improve your chances of passing. Make sure your engine is warm — a cold engine can produce higher emissions readings. Drive for at least 10 minutes before arriving at the station if possible.
Check that your gas cap is tight and not cracked; a loose or damaged cap can trigger an emissions failure even if your engine is fine. If your check engine light is on, have a mechanic scan the code before testing, as some codes will cause an automatic failure.
Make sure your vehicle has enough fuel to complete the test — most stations require at least a quarter tank. If your vehicle has not been driven in several weeks, the battery may be weak, which can affect the test, so drive it for a few days before testing if possible.
Retesting after a repair in Fort Collins
Once you have repaired your vehicle, return to the same station where you failed. Bring your original test report or failure notice. The technician will verify that you are within the 60-day retest window and will run the test again at no charge.
If you pass the retest, you will receive a new passing certificate valid for two years. You can then renew your vehicle registration. If you fail again, you have another 60 days to repair and retest, though a second failure may indicate a more serious problem that requires professional diagnosis.
Some stations offer a "pre-test" or diagnostic service for a small fee if you want to know whether your vehicle will pass before the official test. This can be useful if you are unsure whether your repair was successful, though it is not required.
Frequently Asked Questions
Can I test my vehicle at any station, or do I have to go back to the same one if I fail?
You must return to the same station for your free retest within 60 days. If you want to test at a different station, you will have to pay the full testing fee again. The station where you failed will have your original test data on file, which makes the retest process faster.
What if I move out of Fort Collins after I fail the test?
If you move to a different Colorado county, you can retest at a licensed station in your new county, but you will likely have to pay the full fee again rather than getting the free retest. Contact the CDPHE to confirm the rules for your specific situation before you move.
Do I need an appointment, or can I just show up?
Most Fort Collins testing stations accept walk-ins, though some accept appointments. Calling ahead to ask about wait times is a good idea, especially during busy seasons like early spring when many drivers are renewing registrations.
What if my vehicle is too old or too new to test?
Vehicles model year 1981 and older do not require testing. New vehicles are exempt for their first four years of registration. Check your registration notice or call the CDPHE to confirm whether your specific vehicle is required to test.
Can I renew my registration before I pass the emissions test?
No. Colorado law requires a passing emissions test before registration renewal if testing is required for your vehicle. You must pass the test first, then renew your registration with the passing certificate.