Is radon high in ZIP 51447?

High. The model's predicted long-term basement average for ZIP 51447 is 5.3 pCi/L (SD 0.06), with above-ground floors at 2.8 pCi/L. That is about 2.4× the average US ZIP code (2.2) and close to the Shelby County average of 6.1. It ranks 6 of 9 ZIPs in the county.

Do I need to test my home in 51447?

Yes, now. A predicted average at or above the EPA action level of 4 pCi/L means most homes in 51447 would qualify for mitigation. Use a short-term charcoal kit or a continuous monitor; if the result is 4 or higher, get bids for a mitigation system (typically $800-$2,500).

What EPA radon zone is ZIP 51447 in?

ZIP 51447 lies mostly in Shelby County, which the EPA classifies as Radon Zone 1 (highest potential (predicted average > 4 pCi/L)). Zones are county-wide and date from 1993; the ZIP-level prediction above is from a 2001-2021 model built on millions of tests.

Radon levels in ZIP 51447

HighEPA Zone 1

ZIP 51447 (Shelby County, Iowa): predicted long-term basement average of 5.3 pCi/L (model estimate), about 2.4× the average US ZIP (2.2) and about 1.5× the Iowa average (3.5).

Test ZIP 51447 now - and consider a continuous monitor

The model predicts a long-term basement average of 5.3 pCi/L here, at or above the EPA action level of 4. Homes in the same ZIP still vary widely, so a real test is the only way to know your number. A continuous digital monitor shows how your level swings with weather and season, which matters when you're near the action level.

Get a continuous radon monitor →Or start with a short-term test kit

Already tested at 4 pCi/L or higher? Find a certified mitigation professional (EPA). A mitigation system typically runs $800-$2,500 installed.

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Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

5.3 ± 0.06

pCi/L predicted basement mean (model SD)

2.8 ± 0.07

pCi/L predicted upstairs mean

4.6 ± 0.06

pCi/L predicted typical screening test

How 51447 compares

Within Shelby County, ZIP 51447 ranks #6 of 9 ZIPs by predicted basement level; the county average is 6.1 pCi/L and its ZIPs run from 5.1 to 6.6. The county is EPA Radon Zone 1. About 228 people lived in this ZIP at the 2010 Census.

A screening test in a typical 51447 home is predicted at 4.6 pCi/L, so first-floor living space - not just the basement - can exceed the action level here. Mitigation systems are routine in this range and typically cost $800-$2,500.

Other ZIP codes in Shelby County

515376.6
515705.1
515315.4
515305.4
515275.5
514465.2
515655.2
515625.5

ZIP 51447 radon questions

Is radon high in ZIP 51447?: High. The model's predicted long-term basement average for ZIP 51447 is 5.3 pCi/L (SD 0.06), with above-ground floors at 2.8 pCi/L. That is about 2.4× the average US ZIP code (2.2) and close to the Shelby County average of 6.1. It ranks 6 of 9 ZIPs in the county.
Do I need to test my home in 51447?: Yes, now. A predicted average at or above the EPA action level of 4 pCi/L means most homes in 51447 would qualify for mitigation. Use a short-term charcoal kit or a continuous monitor; if the result is 4 or higher, get bids for a mitigation system (typically $800-$2,500).
What EPA radon zone is ZIP 51447 in?: ZIP 51447 lies mostly in Shelby County, which the EPA classifies as Radon Zone 1 (highest potential (predicted average > 4 pCi/L)). Zones are county-wide and date from 1993; the ZIP-level prediction above is from a 2001-2021 model built on millions of tests.

ZIP pages are generated for ZIPs predicted at or above 2.5 pCi/L and for the most populous ZIP in each county; all other ZIPs appear in their county table. Methodology.