Out of 133 ZIP codes with data in Michigan, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes in EPA Radon Zone 1 | All Michigan Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 133 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | Michigan |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 49009 | Kalamazoo | MI | Zone 1 (highest potential) | 45/100 |
| 2 | 49071 | Mattawan | MI | Zone 1 (highest potential) | 45/100 |
| 3 | 49002 | Portage | MI | Zone 1 (highest potential) | 48/100 |
| 4 | 49001 | Kalamazoo | MI | Zone 1 (highest potential) | 49/100 |
| 5 | 49004 | Kalamazoo | MI | Zone 1 (highest potential) | 49/100 |
| 6 | 49006 | Kalamazoo | MI | Zone 1 (highest potential) | 49/100 |
| 7 | 49007 | Kalamazoo | MI | Zone 1 (highest potential) | 49/100 |
| 8 | 49008 | Kalamazoo | MI | Zone 1 (highest potential) | 49/100 |
| 9 | 49024 | Portage | MI | Zone 1 (highest potential) | 49/100 |
| 10 | 49048 | Kalamazoo | MI | Zone 1 (highest potential) | 49/100 |
| 11 | 49083 | Richland | MI | Zone 1 (highest potential) | 49/100 |
| 12 | 49053 | Galesburg | MI | Zone 1 (highest potential) | 50/100 |
| 13 | 48198 | Ypsilanti | MI | Zone 1 (highest potential) | 55/100 |
| 14 | 48103 | Ann Arbor | MI | Zone 1 (highest potential) | 62/100 |
| 15 | 48105 | Ann Arbor | MI | Zone 1 (highest potential) | 62/100 |
| 16 | 49047 | Dowagiac | MI | Zone 1 (highest potential) | 63/100 |
| 17 | 49286 | Tecumseh | MI | Zone 1 (highest potential) | 63/100 |
| 18 | 48130 | Dexter | MI | Zone 1 (highest potential) | 64/100 |
| 19 | 48108 | Ann Arbor | MI | Zone 1 (highest potential) | 65/100 |
| 20 | 48176 | Saline | MI | Zone 1 (highest potential) | 65/100 |
| 21 | 48197 | Ypsilanti | MI | Zone 1 (highest potential) | 65/100 |
| 22 | 48191 | Willis | MI | Zone 1 (highest potential) | 66/100 |
| 23 | 49097 | Vicksburg | MI | Zone 1 (highest potential) | 66/100 |
| 24 | 49221 | Adrian | MI | Zone 1 (highest potential) | 66/100 |
| 25 | 49228 | Blissfield | MI | Zone 1 (highest potential) | 66/100 |
| 26 | 48104 | Ann Arbor | MI | Zone 1 (highest potential) | 67/100 |
| 27 | 48109 | Ann Arbor | MI | Zone 1 (highest potential) | 67/100 |
| 28 | 48118 | Chelsea | MI | Zone 1 (highest potential) | 67/100 |
| 29 | 48025 | Franklin | MI | Zone 1 (highest potential) | 81/100 |
| 30 | 48106 | Ann Arbor | MI | Zone 1 (highest potential) | — |
| 31 | 48107 | Ann Arbor | MI | Zone 1 (highest potential) | — |
| 32 | 48113 | Ann Arbor | MI | Zone 1 (highest potential) | — |
| 33 | 48115 | Bridgewater | MI | Zone 1 (highest potential) | — |
| 34 | 48139 | Hamburg | MI | Zone 1 (highest potential) | — |
| 35 | 48143 | Lakeland | MI | Zone 1 (highest potential) | — |
| 36 | 48158 | Manchester | MI | Zone 1 (highest potential) | — |
| 37 | 48189 | Whitmore Lake | MI | Zone 1 (highest potential) | — |
| 38 | 48190 | Whittaker | MI | Zone 1 (highest potential) | — |
| 39 | 49003 | Kalamazoo | MI | Zone 1 (highest potential) | — |
| 40 | 49005 | Kalamazoo | MI | Zone 1 (highest potential) | — |
| 41 | 49011 | Athens | MI | Zone 1 (highest potential) | — |
| 42 | 49012 | Augusta | MI | Zone 1 (highest potential) | — |
| 43 | 49014 | Battle Creek | MI | Zone 1 (highest potential) | — |
| 44 | 49015 | Battle Creek | MI | Zone 1 (highest potential) | — |
| 45 | 49016 | Battle Creek | MI | Zone 1 (highest potential) | — |
| 46 | 49018 | Battle Creek | MI | Zone 1 (highest potential) | — |
| 47 | 49019 | Kalamazoo | MI | Zone 1 (highest potential) | — |
| 48 | 49020 | Bedford | MI | Zone 1 (highest potential) | — |
| 49 | 49028 | Bronson | MI | Zone 1 (highest potential) | — |
| 50 | 49029 | Burlington | MI | Zone 1 (highest potential) | — |
| 51 | 49030 | Burr Oak | MI | Zone 1 (highest potential) | — |
| 52 | 49031 | Cassopolis | MI | Zone 1 (highest potential) | — |
| 53 | 49032 | Centreville | MI | Zone 1 (highest potential) | — |
| 54 | 49033 | Ceresco | MI | Zone 1 (highest potential) | — |
| 55 | 49034 | Climax | MI | Zone 1 (highest potential) | — |
| 56 | 49036 | Coldwater | MI | Zone 1 (highest potential) | — |
| 57 | 49037 | Battle Creek | MI | Zone 1 (highest potential) | — |
| 58 | 49040 | Colon | MI | Zone 1 (highest potential) | — |
| 59 | 49042 | Constantine | MI | Zone 1 (highest potential) | — |
| 60 | 49051 | East Leroy | MI | Zone 1 (highest potential) | — |
| 61 | 49052 | Fulton | MI | Zone 1 (highest potential) | — |
| 62 | 49060 | Hickory Corners | MI | Zone 1 (highest potential) | — |
| 63 | 49061 | Jones | MI | Zone 1 (highest potential) | — |
| 64 | 49066 | Leonidas | MI | Zone 1 (highest potential) | — |
| 65 | 49067 | Marcellus | MI | Zone 1 (highest potential) | — |
| 66 | 49068 | Marshall | MI | Zone 1 (highest potential) | — |
| 67 | 49069 | Marshall | MI | Zone 1 (highest potential) | — |
| 68 | 49072 | Mendon | MI | Zone 1 (highest potential) | — |
| 69 | 49075 | Nottawa | MI | Zone 1 (highest potential) | — |
| 70 | 49081 | Portage | MI | Zone 1 (highest potential) | — |
| 71 | 49082 | Quincy | MI | Zone 1 (highest potential) | — |
| 72 | 49087 | Schoolcraft | MI | Zone 1 (highest potential) | — |
| 73 | 49088 | Scotts | MI | Zone 1 (highest potential) | — |
| 74 | 49089 | Sherwood | MI | Zone 1 (highest potential) | — |
| 75 | 49091 | Sturgis | MI | Zone 1 (highest potential) | — |
| 76 | 49092 | Tekonsha | MI | Zone 1 (highest potential) | — |
| 77 | 49093 | Three Rivers | MI | Zone 1 (highest potential) | — |
| 78 | 49094 | Union City | MI | Zone 1 (highest potential) | — |
| 79 | 49095 | Vandalia | MI | Zone 1 (highest potential) | — |
| 80 | 49099 | White Pigeon | MI | Zone 1 (highest potential) | — |
| 81 | 49112 | Edwardsburg | MI | Zone 1 (highest potential) | — |
| 82 | 49130 | Union | MI | Zone 1 (highest potential) | — |
| 83 | 49201 | Jackson | MI | Zone 1 (highest potential) | — |
| 84 | 49202 | Jackson | MI | Zone 1 (highest potential) | — |
| 85 | 49203 | Jackson | MI | Zone 1 (highest potential) | — |
| 86 | 49204 | Jackson | MI | Zone 1 (highest potential) | — |
| 87 | 49220 | Addison | MI | Zone 1 (highest potential) | — |
| 88 | 49224 | Albion | MI | Zone 1 (highest potential) | — |
| 89 | 49227 | Allen | MI | Zone 1 (highest potential) | — |
| 90 | 49229 | Britton | MI | Zone 1 (highest potential) | — |
| 91 | 49230 | Brooklyn | MI | Zone 1 (highest potential) | — |
| 92 | 49232 | Camden | MI | Zone 1 (highest potential) | — |
| 93 | 49233 | Cement City | MI | Zone 1 (highest potential) | — |
| 94 | 49234 | Clarklake | MI | Zone 1 (highest potential) | — |
| 95 | 49235 | Clayton | MI | Zone 1 (highest potential) | — |
| 96 | 49236 | Clinton | MI | Zone 1 (highest potential) | — |
| 97 | 49237 | Concord | MI | Zone 1 (highest potential) | — |
| 98 | 49238 | Deerfield | MI | Zone 1 (highest potential) | — |
| 99 | 49239 | Frontier | MI | Zone 1 (highest potential) | — |
| 100 | 49240 | Grass Lake | MI | 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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