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      Mason City, IA Radon Levels

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

      Mason City, IA Radon Facts

      EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
      County Cerro Gordo County, IA
      Zip Code 50401
      Avg. User Level 5.00 pCi/L
      User Tests 1

      Northern Iowa's Cerro Gordo County seat sits atop thick glacial deposits that contribute to Iowa's reputation for elevated radon levels statewide. Testing data shows an average indoor radon concentration of 5.0 pCi/L, which slightly exceeds the EPA's 4.0 pCi/L action threshold and reflects the area's geological radon risk. The prevalence of full basement foundations in zip code 50401's mix of historic and modern homes makes professional radon testing essential for all residents.

      5.00
      pCi/L average
      Above EPA Action Level

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

      0
      4.0 EPA
      10+

      Mason City, IA Radon Mitigation

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

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      Mason City, IA Radon Levels

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

      Radon LevelCityHome AgeFoundation
      5 pCi/L Mason City, IA 21-50 Years Full Basement

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

      Radon FAQ for Mason City, IA

      What is the average radon level in Mason City, IA?
      Based on 1 user-submitted test, the average radon level in Mason City is 5.00 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 Mason City in?
      Mason City and the 50401 zip code are in Cerro Gordo 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 Mason City?
      Radon mitigation in Mason City 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 Mason City?
      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 Iowa

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

      CityAvg User Radon LevelSubmissions
      Waterloo 8.50 pCi/L 4
      Ames 9.67 pCi/L 3
      Fairfield 14.00 pCi/L 2
      Mount Pleasant 12.00 pCi/L 2
      Ottumwa 5.50 pCi/L 2
      Iowa City 7.00 pCi/L 1
      Muscatine 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