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Testing Boundaries

Is your vehicle required to pass the emissions test?

Oregon's federally enforced State Implementation Plan requires that non-exempt passenger vehicles are tested, every two years, in the Portland and Medford metropolitan areas. This testing is part of the state's compliance with current standards for Criteria Air Pollutants.

Your renewal registration form mailed to you from the DMV may state if your vehicles needs to test.

To determine if your vehicle is registered within a DEQ emissions testing boundary visit our VIP Boundary Lookup tool below:

Vehicle Inspection Program Boundary Lookup



boundary map Portland
Medford map

To determine if your vehicle is registered within a DEQ emissions testing boundary visit our VIP Boundary Lookup tool.

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For questions or feedback on the Vehicle Inspection Program, visit our Questions and Comments page, or call one of our area contact numbers below:

  • Portland Area: 503-229-5066
  • Medford Area: 541-776-6145
  • Toll-Free in Oregon: 877-476-0583
  • Hearing Impaired: 711​


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