Out of 147 ZIP codes with data in Georgia, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes in EPA Radon Zone 1 | All Georgia Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 147 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | Georgia |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 30344 | Atlanta | GA | Zone 1 (highest potential) | 41/100 |
| 2 | 30519 | Buford | GA | Zone 1 (highest potential) | 46/100 |
| 3 | 30354 | Atlanta | GA | Zone 1 (highest potential) | 47/100 |
| 4 | 30127 | Powder Springs | GA | Zone 1 (highest potential) | 49/100 |
| 5 | 30349 | Atlanta | GA | Zone 1 (highest potential) | 50/100 |
| 6 | 30268 | Palmetto | GA | Zone 1 (highest potential) | 53/100 |
| 7 | 30213 | Fairburn | GA | Zone 1 (highest potential) | 57/100 |
| 8 | 30291 | Union City | GA | Zone 1 (highest potential) | 57/100 |
| 9 | 30337 | Atlanta | GA | Zone 1 (highest potential) | 59/100 |
| 10 | 30093 | Norcross | GA | Zone 1 (highest potential) | 60/100 |
| 11 | 30518 | Buford | GA | Zone 1 (highest potential) | 63/100 |
| 12 | 30315 | Atlanta | GA | Zone 1 (highest potential) | 64/100 |
| 13 | 30052 | Loganville | GA | Zone 1 (highest potential) | 65/100 |
| 14 | 30071 | Norcross | GA | Zone 1 (highest potential) | 65/100 |
| 15 | 30096 | Duluth | GA | Zone 1 (highest potential) | 65/100 |
| 16 | 30310 | Atlanta | GA | Zone 1 (highest potential) | 65/100 |
| 17 | 30311 | Atlanta | GA | Zone 1 (highest potential) | 65/100 |
| 18 | 30331 | Atlanta | GA | Zone 1 (highest potential) | 65/100 |
| 19 | 30004 | Alpharetta | GA | Zone 1 (highest potential) | 66/100 |
| 20 | 30005 | Alpharetta | GA | Zone 1 (highest potential) | 66/100 |
| 21 | 30009 | Alpharetta | GA | Zone 1 (highest potential) | 66/100 |
| 22 | 30022 | Alpharetta | GA | Zone 1 (highest potential) | 66/100 |
| 23 | 30062 | Marietta | GA | Zone 1 (highest potential) | 66/100 |
| 24 | 30066 | Marietta | GA | Zone 1 (highest potential) | 66/100 |
| 25 | 30075 | Roswell | GA | Zone 1 (highest potential) | 66/100 |
| 26 | 30076 | Roswell | GA | Zone 1 (highest potential) | 66/100 |
| 27 | 30092 | Norcross | GA | Zone 1 (highest potential) | 66/100 |
| 28 | 30303 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 29 | 30305 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 30 | 30308 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 31 | 30309 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 32 | 30312 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 33 | 30313 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 34 | 30314 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 35 | 30318 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 36 | 30324 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 37 | 30326 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 38 | 30327 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 39 | 30328 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 40 | 30336 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 41 | 30339 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 42 | 30342 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 43 | 30350 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 44 | 30363 | Atlanta | GA | Zone 1 (highest potential) | 66/100 |
| 45 | 30008 | Marietta | GA | Zone 1 (highest potential) | 67/100 |
| 46 | 30017 | Grayson | GA | Zone 1 (highest potential) | 67/100 |
| 47 | 30043 | Lawrenceville | GA | Zone 1 (highest potential) | 67/100 |
| 48 | 30044 | Lawrenceville | GA | Zone 1 (highest potential) | 67/100 |
| 49 | 30045 | Lawrenceville | GA | Zone 1 (highest potential) | 67/100 |
| 50 | 30046 | Lawrenceville | GA | Zone 1 (highest potential) | 67/100 |
| 51 | 30060 | Marietta | GA | Zone 1 (highest potential) | 67/100 |
| 52 | 30064 | Marietta | GA | Zone 1 (highest potential) | 67/100 |
| 53 | 30067 | Marietta | GA | Zone 1 (highest potential) | 67/100 |
| 54 | 30068 | Marietta | GA | Zone 1 (highest potential) | 67/100 |
| 55 | 30080 | Smyrna | GA | Zone 1 (highest potential) | 67/100 |
| 56 | 30082 | Smyrna | GA | Zone 1 (highest potential) | 67/100 |
| 57 | 30106 | Austell | GA | Zone 1 (highest potential) | 67/100 |
| 58 | 30126 | Mableton | GA | Zone 1 (highest potential) | 67/100 |
| 59 | 30144 | Kennesaw | GA | Zone 1 (highest potential) | 67/100 |
| 60 | 30152 | Kennesaw | GA | Zone 1 (highest potential) | 67/100 |
| 61 | 30122 | Lithia Springs | GA | Zone 1 (highest potential) | 83/100 |
| 62 | 30003 | Norcross | GA | Zone 1 (highest potential) | — |
| 63 | 30006 | Marietta | GA | Zone 1 (highest potential) | — |
| 64 | 30007 | Marietta | GA | Zone 1 (highest potential) | — |
| 65 | 30010 | Norcross | GA | Zone 1 (highest potential) | — |
| 66 | 30023 | Alpharetta | GA | Zone 1 (highest potential) | — |
| 67 | 30024 | Suwanee | GA | Zone 1 (highest potential) | — |
| 68 | 30026 | North Metro | GA | Zone 1 (highest potential) | — |
| 69 | 30029 | North Metro | GA | Zone 1 (highest potential) | — |
| 70 | 30042 | Lawrenceville | GA | Zone 1 (highest potential) | — |
| 71 | 30048 | Lilburn | GA | Zone 1 (highest potential) | — |
| 72 | 30049 | Lawrenceville | GA | Zone 1 (highest potential) | — |
| 73 | 30061 | Marietta | GA | Zone 1 (highest potential) | — |
| 74 | 30063 | Marietta | GA | Zone 1 (highest potential) | — |
| 75 | 30065 | Marietta | GA | Zone 1 (highest potential) | — |
| 76 | 30069 | Marietta | GA | Zone 1 (highest potential) | — |
| 77 | 30073 | Decatur | GA | Zone 1 (highest potential) | — |
| 78 | 30077 | Roswell | GA | Zone 1 (highest potential) | — |
| 79 | 30081 | Smyrna | GA | Zone 1 (highest potential) | — |
| 80 | 30090 | Marietta | GA | Zone 1 (highest potential) | — |
| 81 | 30091 | Norcross | GA | Zone 1 (highest potential) | — |
| 82 | 30098 | Duluth | GA | Zone 1 (highest potential) | — |
| 83 | 30099 | Duluth | GA | Zone 1 (highest potential) | — |
| 84 | 30111 | Clarkdale | GA | Zone 1 (highest potential) | — |
| 85 | 30156 | Kennesaw | GA | Zone 1 (highest potential) | — |
| 86 | 30160 | Kennesaw | GA | Zone 1 (highest potential) | — |
| 87 | 30301 | Atlanta | GA | Zone 1 (highest potential) | — |
| 88 | 30302 | Atlanta | GA | Zone 1 (highest potential) | — |
| 89 | 30304 | Atlanta | GA | Zone 1 (highest potential) | — |
| 90 | 30320 | Atlanta | GA | Zone 1 (highest potential) | — |
| 91 | 30321 | Atlanta | GA | Zone 1 (highest potential) | — |
| 92 | 30325 | Atlanta | GA | Zone 1 (highest potential) | — |
| 93 | 30330 | Atlanta | GA | Zone 1 (highest potential) | — |
| 94 | 30332 | Atlanta | GA | Zone 1 (highest potential) | — |
| 95 | 30333 | Atlanta | GA | Zone 1 (highest potential) | — |
| 96 | 30334 | Atlanta | GA | Zone 1 (highest potential) | — |
| 97 | 30343 | Atlanta | GA | Zone 1 (highest potential) | — |
| 98 | 30348 | Atlanta | GA | Zone 1 (highest potential) | — |
| 99 | 30353 | Atlanta | GA | Zone 1 (highest potential) | — |
| 100 | 30355 | Atlanta | GA | 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%.
Explore More Rankings
- Worst ZIP Codes for Lead in Water in Georgia
- ZIP Codes with Most EPA Violations in Georgia
- Lowest Home Safety Scores in Georgia
- Highest Home Safety Scores in Georgia
- Historical NFIP Claim Counts in Georgia
- ZIP Codes with Highest Energy Costs in Georgia
- ZIP Codes with PFAS Detections in Georgia
- Least Reliable Water Systems in Georgia
- Environmental Justice Concern Areas in Georgia
- Worst ZIP Codes for Homebuyers in Georgia
- ZIP Codes with Worst CO & Gas Risk in Georgia
- Safest ZIP Codes for Gas & CO Risk in Georgia
- ZIP Codes with Worst Wildfire Smoke Risk in Georgia
- Safest ZIP Codes for Wildfire Smoke in Georgia
- All Rankings