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      Olympia, WA Radon Levels

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

      Olympia, WA Radon Facts

      EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
      County Thurston County, WA
      Zip Code 98501
      Avg. User Level 7.00 pCi/L
      User Tests 5

      Washington's capital city in Thurston County shows an average radon level of 5.0 pCi/L, which exceeds the EPA action threshold of 4.0 pCi/L. Based on 4 test submissions across multiple zip codes, Olympia's glacial soils and underlying bedrock contribute to elevated radon potential. Residents should prioritize radon testing and mitigation, particularly in homes with basements or crawl spaces typical of Pacific Northwest construction.

      7.00
      pCi/L average
      Above EPA Action Level

      Based on 5 user-submitted radon tests for homes in Olympia, WA. The EPA recommends taking action at or above 4.0 pCi/L.

      0
      4.0 EPA
      10+

      Olympia, WA 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 Olympia?

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      Olympia, WA Radon Levels

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

      Radon LevelCityHome AgeFoundation
      15 pCi/L Olympia, WA 51-99 Years Full Basement
      5 pCi/L Olympia, WA 0-20 Years No Basement/All Crawl Space
      5 pCi/L Olympia, WA 51-99 Years No Basement/All Slab
      5 pCi/L Olympia, WA 51-99 Years Partial Basement

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

      Radon FAQ for Olympia, WA

      What is the average radon level in Olympia, WA?
      Based on 5 user-submitted tests, the average radon level in Olympia is 7.00 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 Olympia in?
      Olympia and the 98501 zip code are in Thurston County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.
      How much does radon mitigation cost in Olympia?
      Radon mitigation in Olympia 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 Olympia?
      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 Washington

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

      CityAvg User Radon LevelSubmissions
      Vancouver 6.56 pCi/L 9
      Kent 3.50 pCi/L 6
      Olympia 7.00 pCi/L 5
      Seattle 5.25 pCi/L 4
      Bellevue 3.75 pCi/L 4
      Spokane 11.67 pCi/L 3
      Camas 8.00 pCi/L 3
      Centralia 7.00 pCi/L 3
      Bellingham 4.50 pCi/L 2
      Kirkland 4.50 pCi/L 2

      Free Radon Mitigation Quote

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      Free Radon Mitigation Quote

      Or call for a free quote: 1-800-299-3578 Local: 206-973-0096

      A licensed contractor will contact you immediately.

      * Required