Out of 62 ZIP codes with data in Utah, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes in EPA Radon Zone 1 | All Utah Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 62 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | Utah |
62 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 84066 | Roosevelt | UT | Zone 1 (highest potential) | 51/100 |
| 2 | 84501 | Price | UT | Zone 1 (highest potential) | 58/100 |
| 3 | 84542 | Wellington | UT | Zone 1 (highest potential) | 58/100 |
| 4 | 84526 | Helper | UT | Zone 1 (highest potential) | 59/100 |
| 5 | 84078 | Vernal | UT | Zone 1 (highest potential) | 65/100 |
| 6 | 84532 | Moab | UT | Zone 1 (highest potential) | 66/100 |
| 7 | 84035 | Jensen | UT | Zone 1 (highest potential) | 67/100 |
| 8 | 84529 | Kenilworth | UT | Zone 1 (highest potential) | 67/100 |
| 9 | 84001 | Altamont | UT | Zone 1 (highest potential) | — |
| 10 | 84002 | Altonah | UT | Zone 1 (highest potential) | — |
| 11 | 84007 | Bluebell | UT | Zone 1 (highest potential) | — |
| 12 | 84008 | Bonanza | UT | Zone 1 (highest potential) | — |
| 13 | 84021 | Duchesne | UT | Zone 1 (highest potential) | — |
| 14 | 84026 | Fort Duchesne | UT | Zone 1 (highest potential) | — |
| 15 | 84027 | Fruitland | UT | Zone 1 (highest potential) | — |
| 16 | 84031 | Hanna | UT | Zone 1 (highest potential) | — |
| 17 | 84039 | Lapoint | UT | Zone 1 (highest potential) | — |
| 18 | 84051 | Mountain Home | UT | Zone 1 (highest potential) | — |
| 19 | 84052 | Myton | UT | Zone 1 (highest potential) | — |
| 20 | 84053 | Neola | UT | Zone 1 (highest potential) | — |
| 21 | 84063 | Randlett | UT | Zone 1 (highest potential) | — |
| 22 | 84072 | Tabiona | UT | Zone 1 (highest potential) | — |
| 23 | 84073 | Talmage | UT | Zone 1 (highest potential) | — |
| 24 | 84076 | Tridell | UT | Zone 1 (highest potential) | — |
| 25 | 84079 | Vernal | UT | Zone 1 (highest potential) | — |
| 26 | 84085 | Whiterocks | UT | Zone 1 (highest potential) | — |
| 27 | 84515 | Cisco | UT | Zone 1 (highest potential) | — |
| 28 | 84520 | East Carbon | UT | Zone 1 (highest potential) | — |
| 29 | 84522 | Emery | UT | Zone 1 (highest potential) | — |
| 30 | 84539 | Sunnyside | UT | Zone 1 (highest potential) | — |
| 31 | 84620 | Aurora | UT | Zone 1 (highest potential) | — |
| 32 | 84621 | Axtell | UT | Zone 1 (highest potential) | — |
| 33 | 84622 | Centerfield | UT | Zone 1 (highest potential) | — |
| 34 | 84623 | Chester | UT | Zone 1 (highest potential) | — |
| 35 | 84627 | Ephraim | UT | Zone 1 (highest potential) | — |
| 36 | 84629 | Fairview | UT | Zone 1 (highest potential) | — |
| 37 | 84630 | Fayette | UT | Zone 1 (highest potential) | — |
| 38 | 84632 | Fountain Green | UT | Zone 1 (highest potential) | — |
| 39 | 84642 | Manti | UT | Zone 1 (highest potential) | — |
| 40 | 84643 | Mayfield | UT | Zone 1 (highest potential) | — |
| 41 | 84646 | Moroni | UT | Zone 1 (highest potential) | — |
| 42 | 84647 | Mount Pleasant | UT | Zone 1 (highest potential) | — |
| 43 | 84652 | Redmond | UT | Zone 1 (highest potential) | — |
| 44 | 84654 | Salina | UT | Zone 1 (highest potential) | — |
| 45 | 84657 | Sigurd | UT | Zone 1 (highest potential) | — |
| 46 | 84662 | Spring City | UT | Zone 1 (highest potential) | — |
| 47 | 84665 | Sterling | UT | Zone 1 (highest potential) | — |
| 48 | 84667 | Wales | UT | Zone 1 (highest potential) | — |
| 49 | 84701 | Richfield | UT | Zone 1 (highest potential) | — |
| 50 | 84711 | Annabella | UT | Zone 1 (highest potential) | — |
| 51 | 84713 | Beaver | UT | Zone 1 (highest potential) | — |
| 52 | 84723 | Circleville | UT | Zone 1 (highest potential) | — |
| 53 | 84724 | Elsinore | UT | Zone 1 (highest potential) | — |
| 54 | 84730 | Glenwood | UT | Zone 1 (highest potential) | — |
| 55 | 84732 | Greenwich | UT | Zone 1 (highest potential) | — |
| 56 | 84739 | Joseph | UT | Zone 1 (highest potential) | — |
| 57 | 84740 | Junction | UT | Zone 1 (highest potential) | — |
| 58 | 84743 | Kingston | UT | Zone 1 (highest potential) | — |
| 59 | 84744 | Koosharem | UT | Zone 1 (highest potential) | — |
| 60 | 84750 | Marysvale | UT | Zone 1 (highest potential) | — |
| 61 | 84754 | Monroe | UT | Zone 1 (highest potential) | — |
| 62 | 84766 | Sevier | UT | Zone 1 (highest potential) | — |
Methodology
This ranking is limited to EPA county-level radon zone classification. Zone 1 identifies the highest county-level potential category; it does not measure a home or establish whether any building is above an action level. Within Zone 1, ZIP codes are sub-ranked by Home Safety Score to organize area context.
Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-08-31.
Frequently Asked Questions
What is EPA Radon Zone 1?
Zone 1 is the EPA highest county-level radon-potential category. It is not a measurement for a home and cannot determine whether a building is above an action level. A home test is required for that decision.
Should I test for radon?
The EPA recommends testing all homes regardless of radon zone. A DIY test kit costs $15-40. Professional testing costs $150-250. If levels exceed 4 pCi/L, mitigation systems ($800-2,500) can reduce radon by up to 99%.
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