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      Santa Clara, CA Radon Levels

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

      Santa Clara, CA Radon Facts

      EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
      County Santa Clara County, CA
      Zip Code 95050
      Avg. User Level 4.00 pCi/L
      User Tests 1

      Located in the heart of Santa Clara County within the San Jose Metro area, Santa Clara sits on alluvial soils and marine sediments typical of the Silicon Valley floor. Testing data shows an average radon level of 4.0 pCi/L, which equals the EPA action threshold, making professional radon testing essential for homeowners in zip code 95050. The area's predominantly slab-on-grade homes and modern construction help limit radon entry points compared to homes with basements.

      4.00
      pCi/L average
      Above EPA Action Level

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

      0
      4.0 EPA
      10+

      Santa Clara, CA Radon Mitigation

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

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      Santa Clara, CA Radon Levels

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

      Radon LevelCityHome AgeFoundation
      4 pCi/L Santa Clara, CA 51-99 Years No Basement/All Slab

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

      Radon FAQ for Santa Clara, CA

      What is the average radon level in Santa Clara, CA?
      Based on 1 user-submitted test, the average radon level in Santa Clara 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 Santa Clara in?
      Santa Clara and the 95050 zip code are in Santa Clara 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 Santa Clara?
      Radon mitigation in Santa Clara 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 Santa Clara?
      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