Out of 80 ZIP codes with data in North Carolina, these are mapped to counties in EPA Radon Zone 1. See also: National ZIP Codes in EPA Radon Zone 1 | All North Carolina Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 80 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | North Carolina |
ZIP Codes in EPA Radon Zone 1
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 27048 | Stoneville | NC | Zone 1 (highest potential) | 50/100 |
| 2 | 27320 | Reidsville | NC | Zone 1 (highest potential) | 50/100 |
| 3 | 28787 | Weaverville | NC | Zone 1 (highest potential) | 51/100 |
| 4 | 28701 | Alexander | NC | Zone 1 (highest potential) | 54/100 |
| 5 | 27288 | Eden | NC | Zone 1 (highest potential) | 56/100 |
| 6 | 28711 | Black Mountain | NC | Zone 1 (highest potential) | 59/100 |
| 7 | 28778 | Swannanoa | NC | Zone 1 (highest potential) | 61/100 |
| 8 | 28801 | Asheville | NC | Zone 1 (highest potential) | 63/100 |
| 9 | 28804 | Asheville | NC | Zone 1 (highest potential) | 63/100 |
| 10 | 28806 | Asheville | NC | Zone 1 (highest potential) | 63/100 |
| 11 | 28803 | Asheville | NC | Zone 1 (highest potential) | 64/100 |
| 12 | 28704 | Arden | NC | Zone 1 (highest potential) | 65/100 |
| 13 | 28715 | Candler | NC | Zone 1 (highest potential) | 65/100 |
| 14 | 28730 | Fairview | NC | Zone 1 (highest potential) | 65/100 |
| 15 | 28805 | Asheville | NC | Zone 1 (highest potential) | 65/100 |
| 16 | 28777 | Spruce Pine | NC | Zone 1 (highest potential) | 67/100 |
| 17 | 27025 | Madison | NC | Zone 1 (highest potential) | — |
| 18 | 27027 | Mayodan | NC | Zone 1 (highest potential) | — |
| 19 | 28605 | Blowing Rock | NC | Zone 1 (highest potential) | — |
| 20 | 28607 | Boone | NC | Zone 1 (highest potential) | — |
| 21 | 28623 | Ennice | NC | Zone 1 (highest potential) | — |
| 22 | 28627 | Glade Valley | NC | Zone 1 (highest potential) | — |
| 23 | 28644 | Laurel Springs | NC | Zone 1 (highest potential) | — |
| 24 | 28663 | Piney Creek | NC | Zone 1 (highest potential) | — |
| 25 | 28668 | Roaring Gap | NC | Zone 1 (highest potential) | — |
| 26 | 28675 | Sparta | NC | Zone 1 (highest potential) | — |
| 27 | 28692 | Vilas | NC | Zone 1 (highest potential) | — |
| 28 | 28698 | Zionville | NC | Zone 1 (highest potential) | — |
| 29 | 28705 | Bakersville | NC | Zone 1 (highest potential) | — |
| 30 | 28708 | Balsam Grove | NC | Zone 1 (highest potential) | — |
| 31 | 28712 | Brevard | NC | Zone 1 (highest potential) | — |
| 32 | 28718 | Cedar Mountain | NC | Zone 1 (highest potential) | — |
| 33 | 28726 | East Flat Rock | NC | Zone 1 (highest potential) | — |
| 34 | 28729 | Etowah | NC | Zone 1 (highest potential) | — |
| 35 | 28731 | Flat Rock | NC | Zone 1 (highest potential) | — |
| 36 | 28732 | Fletcher | NC | Zone 1 (highest potential) | — |
| 37 | 28735 | Gerton | NC | Zone 1 (highest potential) | — |
| 38 | 28739 | Hendersonville | NC | Zone 1 (highest potential) | — |
| 39 | 28742 | Horse Shoe | NC | Zone 1 (highest potential) | — |
| 40 | 28747 | Lake Toxaway | NC | Zone 1 (highest potential) | — |
| 41 | 28748 | Leicester | NC | Zone 1 (highest potential) | — |
| 42 | 28757 | Montreat | NC | Zone 1 (highest potential) | — |
| 43 | 28759 | Mills River | NC | Zone 1 (highest potential) | — |
| 44 | 28766 | Penrose | NC | Zone 1 (highest potential) | — |
| 45 | 28768 | Pisgah Forest | NC | Zone 1 (highest potential) | — |
| 46 | 28772 | Rosman | NC | Zone 1 (highest potential) | — |
| 47 | 28790 | Zirconia | NC | Zone 1 (highest potential) | — |
| 48 | 28791 | Hendersonville | NC | Zone 1 (highest potential) | — |
| 49 | 28792 | Hendersonville | NC | Zone 1 (highest potential) | — |
| 50 | 28901 | Andrews | NC | Zone 1 (highest potential) | — |
| 51 | 28905 | Marble | NC | Zone 1 (highest potential) | — |
| 52 | 28906 | Murphy | NC | Zone 1 (highest potential) | — |
Methodology
This ranking is limited to EPA county-level radon zone classification. Zone 1 is an EPA county-level radon-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: 2026-10-15.
Frequently Asked Questions
What is EPA Radon Zone 1?
Zone 1 is an EPA 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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