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      Custer, SD Radon Levels

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

      Custer, SD Radon Facts

      EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
      County Custer County, SD
      Zip Code 57730
      Avg. User Level 20.00 pCi/L
      User Tests 1

      Nestled in Custer County within the Rapid City Metro area near the Black Hills, Custer shows significantly elevated radon levels with an average of 20.0 pCi/L, far exceeding the EPA action threshold. This 57730 community sits on Precambrian granite and metamorphic rocks that are known radon producers in the Black Hills region. All residents should prioritize immediate radon testing and mitigation due to the area's exceptionally high radon potential.

      20.00
      pCi/L average
      Above EPA Action Level

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

      0
      4.0 EPA
      10+

      Custer, SD Radon Mitigation

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

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      Custer, SD Radon Levels

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

      Radon LevelCityHome AgeFoundation
      20 pCi/L Custer, SD 0-20 Years Full Basement

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

      Radon FAQ for Custer, SD

      What is the average radon level in Custer, SD?
      Based on 1 user-submitted test, the average radon level in Custer is 20.00 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 Custer in?
      Custer and the 57730 zip code are in Custer 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 Custer?
      Radon mitigation in Custer 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 Custer?
      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 South Dakota

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

      CityAvg User Radon LevelSubmissions
      Spearfish 7.75 pCi/L 4
      Rapid City 10.50 pCi/L 2
      Aberdeen 8.50 pCi/L 2
      Sioux Falls 6.00 pCi/L 2
      Watertown 6.00 pCi/L 2

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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