Emissions Testing in Oregon
Oregon requires emissions testing for vehicles registered in the Portland and Medford metropolitan areas. The program is administered by the Oregon Department of Environmental Quality (DEQ) through the Vehicle Inspection Program. Testing is biennial, tied to the two-year registration renewal cycle. In the Portland area, all 1975 and newer gasoline, alternative fuel, hybrid, and light-duty diesel vehicles must test. In the Medford area, vehicles 20 years old or newer must test. New vehicles are exempt for their first four model years. Oregon does not require safety inspections for passenger vehicles. Testing is performed at DEQ-operated Clean Air Stations (six in Portland, one in Medford) and approximately 200 private DEQ Too service providers. Vehicles registered outside the Portland and Medford testing boundaries are not required to test. Drivers should confirm current requirements with the Oregon DEQ at oregon.gov/deq or by calling 877-476-0583.
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Testing stations
Testing Requirements
Current Testing Requirements in Oregon
Oregon operates the Vehicle Inspection Program covering the Portland and Medford metropolitan areas. The program began in the mid-1970s after both areas failed to meet federal Clean Air Act standards for ozone and carbon monoxide. The Oregon DEQ administers the program in partnership with the Oregon DMV (Driver and Motor Vehicle Services). Testing is performed at seven DEQ-operated Clean Air Stations (six in Portland, one in Medford) and about 200 private DEQ Too locations. For 1996 and newer vehicles, the test is an OBD-II diagnostic scan. For pre-1996 vehicles still within the testing window, a tailpipe emissions measurement is performed. A visual inspection checks for the presence of emissions control equipment, and a gas cap test may be included. Oregon does not require safety inspections for passenger vehicles.
Who Needs an Emissions Test
In the Portland area, all 1975 and newer gasoline-powered cars, trucks, vans, motor homes, and buses must test. All 1975 and newer alternative fuel and hybrid vehicles in the Portland area must also test. All 1975 and newer diesel-powered vehicles with a GVWR of 8,500 pounds or less in the Portland area must test. In the Medford area, all gasoline, alternative fuel, hybrid, and light-duty diesel vehicles 20 years old or newer must test. New vehicles are exempt for the first four model years. Motorcycles, low-speed vehicles (mopeds, golf carts, ATVs), and fully electric vehicles are exempt. Diesel vehicles over 8,500 pounds are exempt. Vehicles registered outside the Portland and Medford testing boundaries are exempt. Vehicle owners can verify whether their address falls within the testing boundaries using the DEQ's VIP Boundary Address Matching Tool online.
How Often Tests Are Required
Emissions testing is required biennially, aligned with Oregon's two-year registration renewal cycle. The Oregon DMV mails inspection notices indicating when the test must be completed. A passing test certificate is valid for 180 days for registration purposes. An emissions test is also required when a new resident registers a vehicle in Oregon within the testing boundaries.
Where Emissions Testing Is Required
Emissions testing is required in two areas: the Portland metropolitan area and the Medford-Ashland area (Rogue Valley). The Portland testing area includes parts of Clackamas, Multnomah, and Washington counties. The Medford testing area covers the Medford-Ashland urban growth boundary in Jackson County. Vehicles registered outside these boundaries are not required to test, including those in Salem, Eugene, Bend, Corvallis, Albany, Springfield, Grants Pass, Roseburg, and all other Oregon communities.
What Happens During the Test
For 1996 and newer vehicles, a technician or DEQ Too provider connects to the OBD-II port and runs a diagnostic scan checking for stored trouble codes, readiness monitor status, and the check engine light. A visual inspection confirms the presence of emissions control devices. A gas cap test may be performed. For pre-1996 vehicles still within the testing window, a tailpipe emissions measurement checks hydrocarbon and carbon monoxide levels. A lit check engine light causes automatic failure. Incomplete readiness monitors may require additional driving before retesting. The test typically takes 10 to 15 minutes at a Clean Air Station.
Areas in Oregon That Require Emissions Testing
In the Portland testing area, cities and communities where testing is required include Portland, Beaverton, Hillsboro, Gresham, Lake Oswego, Tigard, Tualatin, Oregon City, West Linn, Milwaukie, Gladstone, Wilsonville, and Sherwood. In the Medford testing area, communities include Medford, Ashland, Central Point, Phoenix, Talent, and Jacksonville. Cities outside the testing boundaries do not require emissions testing. Salem, Eugene, Bend, Corvallis, Albany, Springfield, Grants Pass, Roseburg, Coos Bay, Klamath Falls, McMinnville, Pendleton, The Dalles, and Astoria are all exempt.
How the Emissions Test Works in Oregon
Drivers can visit any of the seven DEQ Clean Air Stations or approximately 200 DEQ Too private service providers. Clean Air Stations are operated by the DEQ. No appointment is needed. Bring your signed registration renewal form (Sections 1 and 2 completed). The testing fee is $25 in the Portland area and $20 in the Medford area. The fee is charged only if the vehicle passes. There is no charge for a failing test. DEQ Too locations may charge an additional device-usage or service fee. Payment options at Clean Air Stations include cash, debit/credit card (Visa, MasterCard, Discover), and money order. If the vehicle fails, the owner receives a test results document explaining the reasons. Unlimited free retests are available at DEQ stations after repairs are made. A 21-day trip permit ($35) is available for vehicles that fail but need to be driven while awaiting repairs. Low-income residents in the Portland area may be eligible for the Clean Air Partners Program, which provides financial assistance for emissions-related repairs on 1996 and newer vehicles. The DEQ can be reached at 877-476-0583 or 971-673-1630.
FAQ
Common questions
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Does Oregon require emissions testing?
Does Oregon require emissions testing?
Yes, but only in the Portland and Medford metropolitan areas. Vehicles registered outside those boundaries are not required to test. Oregon does not require safety inspections for passenger vehicles.
Which vehicles need an emissions test in Oregon?
Which vehicles need an emissions test in Oregon?
In the Portland area, all 1975 and newer gasoline, alternative fuel, hybrid, and light-duty diesel vehicles under 8,500 pounds. In the Medford area, vehicles 20 years old or newer of the same types. New vehicles are exempt for four model years. Motorcycles, fully electric vehicles, and diesel vehicles over 8,500 pounds are exempt.
How often do I need an emissions test in Oregon?
How often do I need an emissions test in Oregon?
Every two years, aligned with the registration renewal cycle. The Oregon DMV mails an inspection notice before the test is due. New residents registering in a testing area must also test.
Which areas in Oregon require emissions testing?
Which areas in Oregon require emissions testing?
The Portland metropolitan area (parts of Clackamas, Multnomah, and Washington counties) and the Medford-Ashland area (Jackson County). All other Oregon counties and cities are exempt.
Are electric or hybrid vehicles exempt from emissions testing in Oregon?
Are electric or hybrid vehicles exempt from emissions testing in Oregon?
Fully electric vehicles are exempt. Hybrid vehicles that use gasoline or alternative fuel are subject to the same testing requirements as other gasoline vehicles if registered in a testing area.
Do diesel vehicles need emissions testing in Oregon?
Do diesel vehicles need emissions testing in Oregon?
Light-duty diesel vehicles with a GVWR of 8,500 pounds or less registered in a testing area must test. Diesel vehicles over 8,500 pounds are exempt. In the Portland area, diesel testing applies to 1975 and newer vehicles. In Medford, it applies to vehicles 20 years old or newer.
What happens if my vehicle fails the emissions test in Oregon?
What happens if my vehicle fails the emissions test in Oregon?
Unlimited free retests are available at DEQ stations after repairs. A 21-day trip permit ($35) allows driving while awaiting repairs. Low-income Portland-area residents may qualify for the Clean Air Partners Program for repair assistance.
How much does emissions testing cost in Oregon?
How much does emissions testing cost in Oregon?
$25 in the Portland area and $20 in the Medford area. The fee is charged only upon passing. There is no charge for a failing test. DEQ Too locations may charge an additional service fee.
Do I need an appointment for emissions testing in Oregon?
Do I need an appointment for emissions testing in Oregon?
No appointment is needed at DEQ Clean Air Stations or most DEQ Too locations. The DEQ recommends checking hours before visiting.
Where can I find emissions test locations in Oregon?
Where can I find emissions test locations in Oregon?
Seven DEQ Clean Air Stations (six in Portland, one in Medford) and approximately 200 DEQ Too private providers are available. The Oregon DEQ website at oregon.gov/deq lists all locations. The DEQ can be reached at 877-476-0583.
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