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      Portland, OR Radon Levels

      Check local Portland radon levels and find certified testing and mitigation professionals to keep your home safe

      Portland, OR Radon Facts

      EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
      County Multnomah County, OR
      Zip Code 97201
      Avg. User Level 4.00 pCi/L
      User Tests 1

      Located in Clackamas County within the greater Portland metro, this 97222 zip code area shows radon levels averaging 4.0 pCi/L, exactly at EPA action guidelines. The Pacific Northwest's volcanic soils and Columbia River basin geology create variable radon conditions throughout the region. Homeowners should maintain regular testing protocols given the area's complex geological foundation and diverse housing stock.

      4.00
      pCi/L average
      Above EPA Action Level

      Based on 1 user-submitted radon test for homes in Portland, OR. The EPA recommends taking action at or above 4.0 pCi/L.

      0
      4.0 EPA
      10+

      Portland, OR Radon Mitigation

      Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

      Need Radon Mitigation or Testing in Portland?

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      Portland, OR Radon Levels

      User-submitted radon test readings from homes in the Portland area.

      Radon LevelCityHome AgeFoundation
      4 pCi/L Portland, OR 51-99 Years Partial Basement

      Have a radon test result for Portland? Submit your reading to help other homeowners.

      Radon FAQ for Portland, OR

      What is the average radon level in Portland, OR?
      Based on 1 user-submitted test, the average radon level in Portland is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
      What EPA Radon Zone is Portland in?
      Portland and the 97201 zip code are in Multnomah County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
      How much does radon mitigation cost in Portland?
      Radon mitigation in Portland typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
      Should I test for radon if I'm buying a home in Portland?
      Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

      Most Active Radon Markets in Oregon

      Cities in Oregon with the most user-submitted radon test data, ranked by number of submissions.

      CityAvg User Radon LevelSubmissions
      Corvallis 5.60 pCi/L 5
      Astoria 9.25 pCi/L 4
      La Grande 10.67 pCi/L 3
      Bend 3.33 pCi/L 3
      Salem 9.00 pCi/L 2
      Eugene 7.00 pCi/L 2
      Medford 7.00 pCi/L 1
      Dundee 6.00 pCi/L 1
      Ashland 4.00 pCi/L 1
      Portland 4.00 pCi/L 1

      Free Radon Mitigation Quote

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      Free Radon Mitigation Quote

      Or call for a free quote: 1-800-299-3578 Local: 503-308-8909

      A licensed contractor will contact you immediately.

      * Required