Call For A Free Quote: 1-800-299-3578 (toll free)

      Simi Valley, CA Radon Levels

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

      Simi Valley, CA Radon Facts

      EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
      County Ventura County, CA
      Zip Code 93063
      Avg. User Level 7.00 pCi/L
      User Tests 1

      Simi Valley in Ventura County sits within the Oxnard Metro area, where local testing reveals an average radon level of 7.0 pCi/L for zip code 93063. This reading significantly exceeds EPA action levels, reflecting the area's unique geology of sedimentary formations and valley topography. Homeowners in this suburban community should prioritize professional radon mitigation given these elevated readings.

      7.00
      pCi/L average
      Above EPA Action Level

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

      0
      4.0 EPA
      10+

      Simi Valley, CA 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 Simi Valley?

      • 100% Free, No-Obligation Quotes
      • Matches You with State-Licensed Ventura County Pros
      1-800-299-3578 Toll-free · Mon–Fri 8am–6pm ET

      Simi Valley, CA Radon Levels

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

      Radon LevelCityHome AgeFoundation
      7 pCi/L Simi Valley, CA 21-50 Years No Basement/All Slab

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

      Radon FAQ for Simi Valley, CA

      What is the average radon level in Simi Valley, CA?
      Based on 1 user-submitted test, the average radon level in Simi Valley 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 Simi Valley in?
      Simi Valley and the 93063 zip code are in Ventura County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
      How much does radon mitigation cost in Simi Valley?
      Radon mitigation in Simi Valley 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 Simi Valley?
      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

      Free Radon Mitigation Quote

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

      A licensed contractor will contact you immediately.

      * Required

      Free Radon Mitigation Quote

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

      A licensed contractor will contact you immediately.

      * Required