Out of 396 ZIP codes with data in Kansas, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes in EPA Radon Zone 1 | All Kansas Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 396 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | Kansas |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 66040 | Lacygne | KS | Zone 1 (highest potential) | 50/100 |
| 2 | 66048 | Leavenworth | KS | Zone 1 (highest potential) | 53/100 |
| 3 | 66025 | Eudora | KS | Zone 1 (highest potential) | 55/100 |
| 4 | 66018 | De Soto | KS | Zone 1 (highest potential) | 58/100 |
| 5 | 66012 | Bonner Springs | KS | Zone 1 (highest potential) | 60/100 |
| 6 | 66086 | Tonganoxie | KS | Zone 1 (highest potential) | 60/100 |
| 7 | 66020 | Easton | KS | Zone 1 (highest potential) | 61/100 |
| 8 | 66007 | Basehor | KS | Zone 1 (highest potential) | 63/100 |
| 9 | 66021 | Edgerton | KS | Zone 1 (highest potential) | 63/100 |
| 10 | 66044 | Lawrence | KS | Zone 1 (highest potential) | 63/100 |
| 11 | 66006 | Baldwin City | KS | Zone 1 (highest potential) | 64/100 |
| 12 | 66047 | Lawrence | KS | Zone 1 (highest potential) | 64/100 |
| 13 | 66049 | Lawrence | KS | Zone 1 (highest potential) | 64/100 |
| 14 | 66030 | Gardner | KS | Zone 1 (highest potential) | 65/100 |
| 15 | 66031 | New Century | KS | Zone 1 (highest potential) | 65/100 |
| 16 | 66043 | Lansing | KS | Zone 1 (highest potential) | 65/100 |
| 17 | 66045 | Lawrence | KS | Zone 1 (highest potential) | 65/100 |
| 18 | 66061 | Olathe | KS | Zone 1 (highest potential) | 65/100 |
| 19 | 66062 | Olathe | KS | Zone 1 (highest potential) | 65/100 |
| 20 | 66083 | Spring Hill | KS | Zone 1 (highest potential) | 65/100 |
| 21 | 66109 | Kansas City | KS | Zone 1 (highest potential) | 65/100 |
| 22 | 66215 | Lenexa | KS | Zone 1 (highest potential) | 65/100 |
| 23 | 66219 | Lenexa | KS | Zone 1 (highest potential) | 65/100 |
| 24 | 66046 | Lawrence | KS | Zone 1 (highest potential) | 66/100 |
| 25 | 66097 | Winchester | KS | Zone 1 (highest potential) | 66/100 |
| 26 | 66101 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 27 | 66102 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 28 | 66103 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 29 | 66104 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 30 | 66105 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 31 | 66106 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 32 | 66111 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 33 | 66112 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 34 | 66160 | Kansas City | KS | Zone 1 (highest potential) | 66/100 |
| 35 | 67735 | Goodland | KS | Zone 1 (highest potential) | 66/100 |
| 36 | 67801 | Dodge City | KS | Zone 1 (highest potential) | 66/100 |
| 37 | 66027 | Fort Leavenworth | KS | Zone 1 (highest potential) | 67/100 |
| 38 | 66085 | Stilwell | KS | Zone 1 (highest potential) | 67/100 |
| 39 | 66202 | Mission | KS | Zone 1 (highest potential) | 67/100 |
| 40 | 66203 | Shawnee | KS | Zone 1 (highest potential) | 67/100 |
| 41 | 66204 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 42 | 66205 | Mission | KS | Zone 1 (highest potential) | 67/100 |
| 43 | 66206 | Leawood | KS | Zone 1 (highest potential) | 67/100 |
| 44 | 66207 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 45 | 66208 | Prairie Village | KS | Zone 1 (highest potential) | 67/100 |
| 46 | 66209 | Leawood | KS | Zone 1 (highest potential) | 67/100 |
| 47 | 66210 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 48 | 66211 | Leawood | KS | Zone 1 (highest potential) | 67/100 |
| 49 | 66212 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 50 | 66213 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 51 | 66214 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 52 | 66216 | Shawnee | KS | Zone 1 (highest potential) | 67/100 |
| 53 | 66217 | Shawnee | KS | Zone 1 (highest potential) | 67/100 |
| 54 | 66218 | Shawnee | KS | Zone 1 (highest potential) | 67/100 |
| 55 | 66220 | Lenexa | KS | Zone 1 (highest potential) | 67/100 |
| 56 | 66221 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 57 | 66223 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 58 | 66224 | Overland Park | KS | Zone 1 (highest potential) | 67/100 |
| 59 | 66226 | Shawnee | KS | Zone 1 (highest potential) | 67/100 |
| 60 | 66227 | Lenexa | KS | Zone 1 (highest potential) | 67/100 |
| 61 | 66002 | Atchison | KS | Zone 1 (highest potential) | — |
| 62 | 66013 | Bucyrus | KS | Zone 1 (highest potential) | — |
| 63 | 66019 | Clearview City | KS | Zone 1 (highest potential) | — |
| 64 | 66023 | Effingham | KS | Zone 1 (highest potential) | — |
| 65 | 66041 | Lancaster | KS | Zone 1 (highest potential) | — |
| 66 | 66051 | Olathe | KS | Zone 1 (highest potential) | — |
| 67 | 66052 | Linwood | KS | Zone 1 (highest potential) | — |
| 68 | 66058 | Muscotah | KS | Zone 1 (highest potential) | — |
| 69 | 66063 | Olathe | KS | Zone 1 (highest potential) | — |
| 70 | 66110 | Kansas City | KS | Zone 1 (highest potential) | — |
| 71 | 66113 | Edwardsville | KS | Zone 1 (highest potential) | — |
| 72 | 66115 | Kansas City | KS | Zone 1 (highest potential) | — |
| 73 | 66117 | Kansas City | KS | Zone 1 (highest potential) | — |
| 74 | 66118 | Kansas City | KS | Zone 1 (highest potential) | — |
| 75 | 66119 | Kansas City | KS | Zone 1 (highest potential) | — |
| 76 | 66201 | Mission | KS | Zone 1 (highest potential) | — |
| 77 | 66222 | Mission | KS | Zone 1 (highest potential) | — |
| 78 | 66225 | Overland Park | KS | Zone 1 (highest potential) | — |
| 79 | 66250 | Shawnee Mission | KS | Zone 1 (highest potential) | — |
| 80 | 66251 | Overland Park | KS | Zone 1 (highest potential) | — |
| 81 | 66276 | Shawnee Mission | KS | Zone 1 (highest potential) | — |
| 82 | 66282 | Overland Park | KS | Zone 1 (highest potential) | — |
| 83 | 66283 | Overland Park | KS | Zone 1 (highest potential) | — |
| 84 | 66285 | Lenexa | KS | Zone 1 (highest potential) | — |
| 85 | 66286 | Shawnee | KS | Zone 1 (highest potential) | — |
| 86 | 66403 | Axtell | KS | Zone 1 (highest potential) | — |
| 87 | 66404 | Baileyville | KS | Zone 1 (highest potential) | — |
| 88 | 66406 | Beattie | KS | Zone 1 (highest potential) | — |
| 89 | 66407 | Belvue | KS | Zone 1 (highest potential) | — |
| 90 | 66408 | Bern | KS | Zone 1 (highest potential) | — |
| 91 | 66411 | Blue Rapids | KS | Zone 1 (highest potential) | — |
| 92 | 66412 | Bremen | KS | Zone 1 (highest potential) | — |
| 93 | 66415 | Centralia | KS | Zone 1 (highest potential) | — |
| 94 | 66416 | Circleville | KS | Zone 1 (highest potential) | — |
| 95 | 66417 | Corning | KS | Zone 1 (highest potential) | — |
| 96 | 66418 | Delia | KS | Zone 1 (highest potential) | — |
| 97 | 66419 | Denison | KS | Zone 1 (highest potential) | — |
| 98 | 66422 | Emmett | KS | Zone 1 (highest potential) | — |
| 99 | 66424 | Everest | KS | Zone 1 (highest potential) | — |
| 100 | 66425 | Fairview | KS | 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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