Is radon high in ZIP 84654?

Moderate. The model's predicted long-term basement average for ZIP 84654 is 3.5 pCi/L (SD 0.06), with above-ground floors at 2.5 pCi/L. That is about 1.6× the average US ZIP code (2.2) and close to the Sevier County average of 3.7. It ranks 3 of 7 ZIPs in the county.

Do I need to test my home in 84654?

Yes. 84654's predicted average falls in the EPA's 2-4 pCi/L "consider fixing" band, and a meaningful share of individual homes in such areas test above 4. Test with a short-term kit and confirm anything at 2 or higher with a long-term test.

What EPA radon zone is ZIP 84654 in?

ZIP 84654 lies mostly in Sevier 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 84654

ModerateEPA Zone 1

ZIP 84654 (Sevier County, Utah): predicted long-term basement average of 3.5 pCi/L (model estimate), about 1.6× the average US ZIP (2.2) and about 1.5× the Utah average (2.3).

Test ZIP 84654 - the EPA says "consider fixing" in this range

The predicted basement average here is 3.5 pCi/L, in the 2-4 pCi/L band where the EPA recommends considering mitigation. Plenty of individual homes in a moderate area test above 4. Start with a short-term test; if it comes back at 2 or higher, follow up with a long-term test or a continuous monitor.

Get a short-term test kit →Or track it with a continuous monitor

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.

3.5 ± 0.06

pCi/L predicted basement mean (model SD)

2.5 ± 0.05

pCi/L predicted upstairs mean

3.0 ± 0.05

pCi/L predicted typical screening test

How 84654 compares

Within Sevier County, ZIP 84654 ranks #3 of 7 ZIPs by predicted basement level; the county average is 3.7 pCi/L and its ZIPs run from 2.9 to 5.1. The county is EPA Radon Zone 1. About 2,689 people lived in this ZIP at the 2010 Census.

Above-ground floors are predicted at 2.5 pCi/L, below the action level, while basements sit in the 2-4 band. If you spend time in a finished basement, test there first.

Other ZIP codes in Sevier County

847013.2
847545.1
846523.2
847393.7
847303.2
847662.9

ZIP 84654 radon questions

Is radon high in ZIP 84654?: Moderate. The model's predicted long-term basement average for ZIP 84654 is 3.5 pCi/L (SD 0.06), with above-ground floors at 2.5 pCi/L. That is about 1.6× the average US ZIP code (2.2) and close to the Sevier County average of 3.7. It ranks 3 of 7 ZIPs in the county.
Do I need to test my home in 84654?: Yes. 84654's predicted average falls in the EPA's 2-4 pCi/L "consider fixing" band, and a meaningful share of individual homes in such areas test above 4. Test with a short-term kit and confirm anything at 2 or higher with a long-term test.
What EPA radon zone is ZIP 84654 in?: ZIP 84654 lies mostly in Sevier 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.