Out of 332 ZIP codes with data in Tennessee, these are mapped to counties in EPA Radon Zone 1. See also: National ZIP Codes in EPA Radon Zone 1 | All Tennessee Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 332 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | Tennessee |
ZIP Codes in EPA Radon Zone 1
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 37087 | Lebanon | TN | Zone 1 (highest potential) | 37/100 |
| 2 | 37184 | Watertown | TN | Zone 1 (highest potential) | 37/100 |
| 3 | 37760 | Jefferson City | TN | Zone 1 (highest potential) | 40/100 |
| 4 | 37890 | White Pine | TN | Zone 1 (highest potential) | 40/100 |
| 5 | 37090 | Lebanon | TN | Zone 1 (highest potential) | 42/100 |
| 6 | 37046 | College Grove | TN | Zone 1 (highest potential) | 43/100 |
| 7 | 37820 | New Market | TN | Zone 1 (highest potential) | 44/100 |
| 8 | 37179 | Thompsons Station | TN | Zone 1 (highest potential) | 45/100 |
| 9 | 37725 | Dandridge | TN | Zone 1 (highest potential) | 45/100 |
| 10 | 37771 | Lenoir City | TN | Zone 1 (highest potential) | 45/100 |
| 11 | 37617 | Blountville | TN | Zone 1 (highest potential) | 46/100 |
| 12 | 37660 | Kingsport | TN | Zone 1 (highest potential) | 46/100 |
| 13 | 37871 | Strawberry Plains | TN | Zone 1 (highest potential) | 46/100 |
| 14 | 37663 | Kingsport | TN | Zone 1 (highest potential) | 47/100 |
| 15 | 37772 | Lenoir City | TN | Zone 1 (highest potential) | 47/100 |
| 16 | 37085 | Lascassas | TN | Zone 1 (highest potential) | 48/100 |
| 17 | 37135 | Nolensville | TN | Zone 1 (highest potential) | 48/100 |
| 18 | 37664 | Kingsport | TN | Zone 1 (highest potential) | 48/100 |
| 19 | 37665 | Kingsport | TN | Zone 1 (highest potential) | 48/100 |
| 20 | 37014 | Arrington | TN | Zone 1 (highest potential) | 50/100 |
| 21 | 37329 | Englewood | TN | Zone 1 (highest potential) | 50/100 |
| 22 | 37748 | Harriman | TN | Zone 1 (highest potential) | 50/100 |
| 23 | 37830 | Oak Ridge | TN | Zone 1 (highest potential) | 50/100 |
| 24 | 38486 | Westpoint | TN | Zone 1 (highest potential) | 51/100 |
| 25 | 38464 | Lawrenceburg | TN | Zone 1 (highest potential) | 54/100 |
| 26 | 37686 | Piney Flats | TN | Zone 1 (highest potential) | 55/100 |
| 27 | 37618 | Bluff City | TN | Zone 1 (highest potential) | 56/100 |
| 28 | 38468 | Leoma | TN | Zone 1 (highest potential) | 56/100 |
| 29 | 38456 | Ethridge | TN | Zone 1 (highest potential) | 58/100 |
| 30 | 38469 | Loretto | TN | Zone 1 (highest potential) | 58/100 |
| 31 | 37072 | Goodlettsville | TN | Zone 1 (highest potential) | 59/100 |
| 32 | 37705 | Andersonville | TN | Zone 1 (highest potential) | 59/100 |
| 33 | 37027 | Brentwood | TN | Zone 1 (highest potential) | 60/100 |
| 34 | 37221 | Nashville | TN | Zone 1 (highest potential) | 60/100 |
| 35 | 37620 | Bristol | TN | Zone 1 (highest potential) | 60/100 |
| 36 | 37710 | Briceville | TN | Zone 1 (highest potential) | 60/100 |
| 37 | 37716 | Clinton | TN | Zone 1 (highest potential) | 60/100 |
| 38 | 37774 | Loudon | TN | Zone 1 (highest potential) | 60/100 |
| 39 | 37064 | Franklin | TN | Zone 1 (highest potential) | 61/100 |
| 40 | 37067 | Franklin | TN | Zone 1 (highest potential) | 61/100 |
| 41 | 37069 | Franklin | TN | Zone 1 (highest potential) | 61/100 |
| 42 | 37721 | Corryton | TN | Zone 1 (highest potential) | 61/100 |
| 43 | 37769 | Lake City | TN | Zone 1 (highest potential) | 61/100 |
| 44 | 37854 | Rockwood | TN | Zone 1 (highest potential) | 61/100 |
| 45 | 37737 | Friendsville | TN | Zone 1 (highest potential) | 62/100 |
| 46 | 37742 | Greenback | TN | Zone 1 (highest potential) | 62/100 |
| 47 | 37754 | Heiskell | TN | Zone 1 (highest potential) | 62/100 |
| 48 | 37801 | Maryville | TN | Zone 1 (highest potential) | 62/100 |
| 49 | 37804 | Maryville | TN | Zone 1 (highest potential) | 62/100 |
| 50 | 37828 | Norris | TN | Zone 1 (highest potential) | 62/100 |
| 51 | 37849 | Powell | TN | Zone 1 (highest potential) | 62/100 |
| 52 | 37886 | Walland | TN | Zone 1 (highest potential) | 62/100 |
| 53 | 37752 | Harrogate | TN | Zone 1 (highest potential) | 63/100 |
| 54 | 37777 | Louisville | TN | Zone 1 (highest potential) | 63/100 |
| 55 | 37803 | Maryville | TN | Zone 1 (highest potential) | 63/100 |
| 56 | 37846 | Philadelphia | TN | Zone 1 (highest potential) | 63/100 |
| 57 | 37882 | Townsend | TN | Zone 1 (highest potential) | 63/100 |
| 58 | 37303 | Athens | TN | Zone 1 (highest potential) | 64/100 |
| 59 | 37763 | Kingston | TN | Zone 1 (highest potential) | 64/100 |
| 60 | 37806 | Mascot | TN | Zone 1 (highest potential) | 64/100 |
| 61 | 37853 | Rockford | TN | Zone 1 (highest potential) | 64/100 |
| 62 | 37879 | Tazewell | TN | Zone 1 (highest potential) | 64/100 |
| 63 | 37924 | Knoxville | TN | Zone 1 (highest potential) | 64/100 |
| 64 | 37938 | Knoxville | TN | Zone 1 (highest potential) | 64/100 |
| 65 | 37080 | Joelton | TN | Zone 1 (highest potential) | 65/100 |
| 66 | 37115 | Madison | TN | Zone 1 (highest potential) | 65/100 |
| 67 | 37122 | Mount Juliet | TN | Zone 1 (highest potential) | 65/100 |
| 68 | 37189 | Whites Creek | TN | Zone 1 (highest potential) | 65/100 |
| 69 | 37207 | Nashville | TN | Zone 1 (highest potential) | 65/100 |
| 70 | 37216 | Nashville | TN | Zone 1 (highest potential) | 65/100 |
| 71 | 37701 | Alcoa | TN | Zone 1 (highest potential) | 65/100 |
| 72 | 37825 | New Tazewell | TN | Zone 1 (highest potential) | 65/100 |
| 73 | 37826 | Niota | TN | Zone 1 (highest potential) | 65/100 |
| 74 | 37934 | Knoxville | TN | Zone 1 (highest potential) | 65/100 |
| 75 | 37013 | Antioch | TN | Zone 1 (highest potential) | 66/100 |
| 76 | 37076 | Hermitage | TN | Zone 1 (highest potential) | 66/100 |
| 77 | 37201 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 78 | 37203 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 79 | 37204 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 80 | 37205 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 81 | 37206 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 82 | 37208 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 83 | 37209 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 84 | 37210 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 85 | 37211 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 86 | 37212 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 87 | 37214 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 88 | 37215 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 89 | 37217 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 90 | 37218 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 91 | 37219 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 92 | 37220 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 93 | 37228 | Nashville | TN | Zone 1 (highest potential) | 66/100 |
| 94 | 37331 | Etowah | TN | Zone 1 (highest potential) | 66/100 |
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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