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      Pasadena, CA Radon Levels

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

      Pasadena, CA Radon Facts

      EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
      County Los Angeles County, CA
      Zip Code 91101
      Avg. User Level 4.00 pCi/L
      User Tests 1

      Located in Los Angeles County within the expansive Los Angeles Metro area, Pasadena sits at the base of the San Gabriel Mountains where alluvial fan deposits over sedimentary bedrock create California's generally lower radon environment. Recent testing shows an average radon level of 4.0 pCi/L, which meets the EPA action level threshold and suggests homeowners should consider testing and potential mitigation. Despite California's typically lower radon potential, homes in zip code 91101 with basements or those built on specific geological formations can still accumulate concerning radon levels.

      4.00
      pCi/L average
      Above EPA Action Level

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

      0
      4.0 EPA
      10+

      Pasadena, CA Radon Mitigation

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

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      Pasadena, CA Radon Levels

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

      Radon LevelCityHome AgeFoundation
      4 pCi/L Pasadena, CA 51-99 Years No Basement/All Crawl Space

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

      Radon FAQ for Pasadena, CA

      What is the average radon level in Pasadena, CA?
      Based on 1 user-submitted test, the average radon level in Pasadena 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 Pasadena in?
      Pasadena and the 91101 zip code are in Los Angeles 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 Pasadena?
      Radon mitigation in Pasadena 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 Pasadena?
      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 California

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

      CityAvg User Radon LevelSubmissions
      Los Angeles 7.83 pCi/L 6
      Mammoth Lakes 10.80 pCi/L 5
      San Jose 4.20 pCi/L 5
      Rancho Palos Verdes 8.00 pCi/L 4
      Bishop 6.25 pCi/L 4
      Oakland 5.00 pCi/L 4
      Woodland Hills 7.67 pCi/L 3
      South Lake Tahoe 6.33 pCi/L 3
      Palos Verdes Peninsula 6.00 pCi/L 3
      Sacramento 4.33 pCi/L 3

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      Free Radon Mitigation Quote

      Or call for a free quote: 1-800-299-3578

      A licensed contractor will contact you immediately.

      * Required