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      Houston, TX Radon Levels

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

      Houston, TX Radon Facts

      EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
      County Harris County, TX
      Zip Code 77002
      Avg. User Level 3.50 pCi/L
      User Tests 2

      America's fourth-largest city spans across Harris County on Gulf Coast prairie sediments and clay soils that typically produce lower radon levels. The metropolitan area's diverse housing stock includes high-rise apartments, suburban subdivisions, and historic neighborhoods, with slab-on-grade foundations predominating due to the flat terrain and high water table. Current testing data shows an average radon level of 3.5 pCi/L across multiple zip codes, which falls within EPA recommended ranges, though individual homes can still benefit from testing to confirm safe levels.

      3.50
      pCi/L average
      Below EPA Action Level

      Based on 2 user-submitted radon tests for homes in Houston, TX. The EPA recommends taking action at or above 4.0 pCi/L.

      0
      4.0 EPA
      10+

      Houston, TX 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 Houston?

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      Houston, TX Radon Levels

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

      Radon LevelCityHome AgeFoundation
      6 pCi/L Houston, TX 21-50 Years No Basement/All Slab
      1 pCi/L Houston, TX 0-20 Years No Basement/All Slab

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

      Radon FAQ for Houston, TX

      What is the average radon level in Houston, TX?
      Based on 2 user-submitted tests, the average radon level in Houston is 3.50 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.
      What EPA Radon Zone is Houston in?
      Houston and the 77002 zip code are in Harris County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.
      How much does radon mitigation cost in Houston?
      Radon mitigation in Houston 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 Houston?
      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 Texas

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

      CityAvg User Radon LevelSubmissions
      Lubbock 12.70 pCi/L 10
      San Antonio 6.57 pCi/L 7
      Austin 6.14 pCi/L 7
      Dallas 8.00 pCi/L 5
      Abilene 4.50 pCi/L 2
      Houston 3.50 pCi/L 2
      Plano 6.00 pCi/L 1
      Frisco 3.00 pCi/L 1
      Nacogdoches No submissions 0

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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