Out of 151 ZIP codes with data in Alabama, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes in EPA Radon Zone 1 | All Alabama Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 151 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | Alabama |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 35773 | Toney | AL | Zone 1 (highest potential) | 33/100 |
| 2 | 35741 | Brownsboro | AL | Zone 1 (highest potential) | 39/100 |
| 3 | 35749 | Harvest | AL | Zone 1 (highest potential) | 39/100 |
| 4 | 35757 | Madison | AL | Zone 1 (highest potential) | 39/100 |
| 5 | 35750 | Hazel Green | AL | Zone 1 (highest potential) | 40/100 |
| 6 | 35759 | Meridianville | AL | Zone 1 (highest potential) | 40/100 |
| 7 | 35761 | New Market | AL | Zone 1 (highest potential) | 40/100 |
| 8 | 35763 | Owens Cross Roads | AL | Zone 1 (highest potential) | 40/100 |
| 9 | 35806 | Huntsville | AL | Zone 1 (highest potential) | 40/100 |
| 10 | 35810 | Huntsville | AL | Zone 1 (highest potential) | 40/100 |
| 11 | 35811 | Huntsville | AL | Zone 1 (highest potential) | 40/100 |
| 12 | 35758 | Madison | AL | Zone 1 (highest potential) | 45/100 |
| 13 | 35824 | Huntsville | AL | Zone 1 (highest potential) | 46/100 |
| 14 | 35760 | New Hope | AL | Zone 1 (highest potential) | 48/100 |
| 15 | 35801 | Huntsville | AL | Zone 1 (highest potential) | 50/100 |
| 16 | 35802 | Huntsville | AL | Zone 1 (highest potential) | 50/100 |
| 17 | 35803 | Huntsville | AL | Zone 1 (highest potential) | 50/100 |
| 18 | 35805 | Huntsville | AL | Zone 1 (highest potential) | 50/100 |
| 19 | 35816 | Huntsville | AL | Zone 1 (highest potential) | 50/100 |
| 20 | 35896 | Huntsville | AL | Zone 1 (highest potential) | 50/100 |
| 21 | 35622 | Falkville | AL | Zone 1 (highest potential) | 59/100 |
| 22 | 35640 | Hartselle | AL | Zone 1 (highest potential) | 59/100 |
| 23 | 35643 | Hillsboro | AL | Zone 1 (highest potential) | 60/100 |
| 24 | 35601 | Decatur | AL | Zone 1 (highest potential) | 61/100 |
| 25 | 35603 | Decatur | AL | Zone 1 (highest potential) | 61/100 |
| 26 | 35619 | Danville | AL | Zone 1 (highest potential) | 61/100 |
| 27 | 35650 | Moulton | AL | Zone 1 (highest potential) | 61/100 |
| 28 | 35673 | Trinity | AL | Zone 1 (highest potential) | 61/100 |
| 29 | 35754 | Laceys Spring | AL | Zone 1 (highest potential) | 61/100 |
| 30 | 35670 | Somerville | AL | Zone 1 (highest potential) | 64/100 |
| 31 | 35618 | Courtland | AL | Zone 1 (highest potential) | 65/100 |
| 32 | 36251 | Ashland | AL | Zone 1 (highest potential) | 67/100 |
| 33 | 35014 | Alpine | AL | Zone 1 (highest potential) | — |
| 34 | 35032 | Bon Air | AL | Zone 1 (highest potential) | — |
| 35 | 35044 | Childersburg | AL | Zone 1 (highest potential) | — |
| 36 | 35046 | Clanton | AL | Zone 1 (highest potential) | — |
| 37 | 35072 | Goodwater | AL | Zone 1 (highest potential) | — |
| 38 | 35082 | Hollins | AL | Zone 1 (highest potential) | — |
| 39 | 35096 | Lincoln | AL | Zone 1 (highest potential) | — |
| 40 | 35136 | Rockford | AL | Zone 1 (highest potential) | — |
| 41 | 35149 | Sycamore | AL | Zone 1 (highest potential) | — |
| 42 | 35150 | Sylacauga | AL | Zone 1 (highest potential) | — |
| 43 | 35151 | Sylacauga | AL | Zone 1 (highest potential) | — |
| 44 | 35160 | Talladega | AL | Zone 1 (highest potential) | — |
| 45 | 35161 | Talladega | AL | Zone 1 (highest potential) | — |
| 46 | 35183 | Weogufka | AL | Zone 1 (highest potential) | — |
| 47 | 35571 | Hodges | AL | Zone 1 (highest potential) | — |
| 48 | 35581 | Phil Campbell | AL | Zone 1 (highest potential) | — |
| 49 | 35582 | Red Bay | AL | Zone 1 (highest potential) | — |
| 50 | 35585 | Spruce Pine | AL | Zone 1 (highest potential) | — |
| 51 | 35593 | Vina | AL | Zone 1 (highest potential) | — |
| 52 | 35602 | Decatur | AL | Zone 1 (highest potential) | — |
| 53 | 35609 | Decatur | AL | Zone 1 (highest potential) | — |
| 54 | 35610 | Anderson | AL | Zone 1 (highest potential) | — |
| 55 | 35611 | Athens | AL | Zone 1 (highest potential) | — |
| 56 | 35612 | Athens | AL | Zone 1 (highest potential) | — |
| 57 | 35613 | Athens | AL | Zone 1 (highest potential) | — |
| 58 | 35614 | Athens | AL | Zone 1 (highest potential) | — |
| 59 | 35615 | Belle Mina | AL | Zone 1 (highest potential) | — |
| 60 | 35616 | Cherokee | AL | Zone 1 (highest potential) | — |
| 61 | 35617 | Cloverdale | AL | Zone 1 (highest potential) | — |
| 62 | 35620 | Elkmont | AL | Zone 1 (highest potential) | — |
| 63 | 35630 | Florence | AL | Zone 1 (highest potential) | — |
| 64 | 35631 | Florence | AL | Zone 1 (highest potential) | — |
| 65 | 35632 | Florence | AL | Zone 1 (highest potential) | — |
| 66 | 35633 | Florence | AL | Zone 1 (highest potential) | — |
| 67 | 35634 | Florence | AL | Zone 1 (highest potential) | — |
| 68 | 35645 | Killen | AL | Zone 1 (highest potential) | — |
| 69 | 35646 | Leighton | AL | Zone 1 (highest potential) | — |
| 70 | 35647 | Lester | AL | Zone 1 (highest potential) | — |
| 71 | 35648 | Lexington | AL | Zone 1 (highest potential) | — |
| 72 | 35649 | Mooresville | AL | Zone 1 (highest potential) | — |
| 73 | 35651 | Mount Hope | AL | Zone 1 (highest potential) | — |
| 74 | 35652 | Rogersville | AL | Zone 1 (highest potential) | — |
| 75 | 35653 | Russellville | AL | Zone 1 (highest potential) | — |
| 76 | 35654 | Russellville | AL | Zone 1 (highest potential) | — |
| 77 | 35660 | Sheffield | AL | Zone 1 (highest potential) | — |
| 78 | 35661 | Muscle Shoals | AL | Zone 1 (highest potential) | — |
| 79 | 35662 | Muscle Shoals | AL | Zone 1 (highest potential) | — |
| 80 | 35671 | Tanner | AL | Zone 1 (highest potential) | — |
| 81 | 35672 | Town Creek | AL | Zone 1 (highest potential) | — |
| 82 | 35674 | Tuscumbia | AL | Zone 1 (highest potential) | — |
| 83 | 35677 | Waterloo | AL | Zone 1 (highest potential) | — |
| 84 | 35699 | Decatur | AL | Zone 1 (highest potential) | — |
| 85 | 35739 | Ardmore | AL | Zone 1 (highest potential) | — |
| 86 | 35740 | Bridgeport | AL | Zone 1 (highest potential) | — |
| 87 | 35742 | Capshaw | AL | Zone 1 (highest potential) | — |
| 88 | 35744 | Dutton | AL | Zone 1 (highest potential) | — |
| 89 | 35745 | Estillfork | AL | Zone 1 (highest potential) | — |
| 90 | 35746 | Fackler | AL | Zone 1 (highest potential) | — |
| 91 | 35748 | Gurley | AL | Zone 1 (highest potential) | — |
| 92 | 35751 | Hollytree | AL | Zone 1 (highest potential) | — |
| 93 | 35752 | Hollywood | AL | Zone 1 (highest potential) | — |
| 94 | 35756 | Madison | AL | Zone 1 (highest potential) | — |
| 95 | 35762 | Normal | AL | Zone 1 (highest potential) | — |
| 96 | 35764 | Paint Rock | AL | Zone 1 (highest potential) | — |
| 97 | 35766 | Princeton | AL | Zone 1 (highest potential) | — |
| 98 | 35767 | Ryland | AL | Zone 1 (highest potential) | — |
| 99 | 35768 | Scottsboro | AL | Zone 1 (highest potential) | — |
| 100 | 35769 | Scottsboro | AL | 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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