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      Phoenix, AZ Radon Levels

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

      Phoenix, AZ Radon Facts

      EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
      County Maricopa County, AZ
      Zip Code 85003
      Avg. User Level 5.40 pCi/L
      User Tests 10

      Arizona's capital city in Maricopa County shows an average radon level of 5.4 pCi/L across multiple Phoenix zip codes, moderately exceeding the EPA's 4.0 pCi/L action threshold. Desert soil conditions and the prevalence of slab-on-grade construction throughout the Phoenix Metro area create varied radon entry patterns. Even in Arizona's arid climate, radon testing remains important for homeowners across all Phoenix neighborhoods.

      5.40
      pCi/L average
      Above EPA Action Level

      Based on 10 user-submitted radon tests for homes in Phoenix, AZ. The EPA recommends taking action at or above 4.0 pCi/L.

      0
      4.0 EPA
      10+

      Phoenix, AZ Radon Mitigation

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

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      Phoenix, AZ Radon Levels

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

      Radon LevelCityHome AgeFoundation
      6 pCi/L Phoenix, AZ 51-99 Years No Basement/All Slab
      4 pCi/L Phoenix, AZ 21-50 Years No Basement/All Slab
      3 pCi/L Phoenix, AZ 0-20 Years No Basement/All Slab
      4 pCi/L Phoenix, AZ 0-20 Years No Basement/All Slab
      5 pCi/L Phoenix, AZ 21-50 Years No Basement/All Slab

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

      Radon FAQ for Phoenix, AZ

      What is the average radon level in Phoenix, AZ?
      Based on 10 user-submitted tests, the average radon level in Phoenix is 5.40 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 Phoenix in?
      Phoenix and the 85003 zip code are in Maricopa 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 Phoenix?
      Radon mitigation in Phoenix 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 Phoenix?
      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 Arizona

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

      CityAvg User Radon LevelSubmissions
      Prescott 6.79 pCi/L 14
      Scottsdale 7.75 pCi/L 12
      Phoenix 5.40 pCi/L 10
      Mesa 6.40 pCi/L 5
      Flagstaff 6.00 pCi/L 5
      Tucson 5.25 pCi/L 4
      Payson 6.67 pCi/L 3
      Glendale 6.50 pCi/L 2
      Peoria 3.00 pCi/L 2
      Prescott Valley 4.00 pCi/L 1

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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