Defiance, IA resides in Shelby 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. Testing is recommended for all homes in the 51527 zip code area.
Defiance, IA Radon Mitigation
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Defiance, IA Radon Testing
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Defiance Radon Facts
Key details about the radon risk profile for Defiance and the 51527 zip code area.
EPA Radon Zone
Zone 1 — High Risk
County
Shelby County, IA
Zip Code
51527
Predicted Screening Level
> 4.0 pCi/L (Zone 1)
Defiance and the 51527 zip code are located in Shelby County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Defiance, IA
What EPA Radon Zone is Defiance in?
Defiance and the 51527 zip code are in Shelby 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 Defiance?
Radon mitigation in Defiance 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 Defiance?
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.
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