Knoxville, IA Radon Levels
Check local Knoxville radon levels and find certified testing and mitigation professionals to keep your home safe
Knoxville, IA Radon Facts
EPA Radon Zone
Zone 1 — High Risk
> 4.0 pCi/L (Zone 1)
County
Marion County, IA
Zip Code
50138
Positioned in Marion County in south-central Iowa, Knoxville lies within glacial till deposits characteristic of the Des Moines Lobe region. Although testing data for zip code 50138 remains limited, homeowners should test their properties given Iowa's typically elevated radon potential from the combination of radium-rich glacial soils and the region's limestone bedrock foundation.
Knoxville, IA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Radon FAQ for Knoxville, IA
What EPA Radon Zone is Knoxville in?
Knoxville and the 50138 zip code are in Marion 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 Knoxville?
Radon mitigation in Knoxville 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 Knoxville?
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.