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      Walla Walla, WA Radon Levels

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

      Walla Walla, WA Radon Facts

      EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
      County Walla Walla County, WA
      Zip Code 99362
      Avg. User Level 6.00 pCi/L
      User Tests 1

      Located in southeastern Washington's Walla Walla County, this community has recorded an average radon level of 6.0 pCi/L based on available data. This reading exceeds the EPA's 4.0 pCi/L action threshold, reflecting the area's basalt bedrock and loess soil conditions that can facilitate radon accumulation. Homeowners in zip code 99362 should prioritize radon testing and mitigation.

      6.00
      pCi/L average
      Above EPA Action Level

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

      0
      4.0 EPA
      10+

      Walla Walla, 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 Walla Walla?

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      Walla Walla, WA Radon Levels

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

      Radon LevelCityHome AgeFoundation
      6 pCi/L Walla Walla, WA 100+ Years Partial Basement

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

      Radon FAQ for Walla Walla, WA

      What is the average radon level in Walla Walla, WA?
      Based on 1 user-submitted test, the average radon level in Walla Walla is 6.00 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 Walla Walla in?
      Walla Walla and the 99362 zip code are in Walla Walla 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 Walla Walla?
      Radon mitigation in Walla Walla 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 Walla Walla?
      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

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      Free Radon Mitigation Quote

      Or call for a free quote: 1-800-299-3578 Local: 509-202-4296

      A licensed contractor will contact you immediately.

      * Required