Out of 400 ZIP codes with data in North Dakota, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes in EPA Radon Zone 1 | All North Dakota Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 400 |
| Lowest value | Zone 1 (highest potential) |
| Median value | Zone 1 (highest potential) |
| State | North Dakota |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Radon Zone | Safety Score |
|---|---|---|---|---|---|
| 1 | 58047 | Horace | ND | Zone 1 (highest potential) | 61/100 |
| 2 | 58040 | Gwinner | ND | Zone 1 (highest potential) | 66/100 |
| 3 | 58701 | Minot | ND | Zone 1 (highest potential) | 66/100 |
| 4 | 58703 | Minot | ND | Zone 1 (highest potential) | 66/100 |
| 5 | 58785 | Surrey | ND | Zone 1 (highest potential) | 66/100 |
| 6 | 58854 | Watford City | ND | Zone 1 (highest potential) | 66/100 |
| 7 | 58051 | Kindred | ND | Zone 1 (highest potential) | 67/100 |
| 8 | 58064 | Page | ND | Zone 1 (highest potential) | 67/100 |
| 9 | 58071 | Tower City | ND | Zone 1 (highest potential) | 67/100 |
| 10 | 58078 | West Fargo | ND | Zone 1 (highest potential) | 67/100 |
| 11 | 58102 | Fargo | ND | Zone 1 (highest potential) | 67/100 |
| 12 | 58103 | Fargo | ND | Zone 1 (highest potential) | 67/100 |
| 13 | 58104 | Fargo | ND | Zone 1 (highest potential) | 67/100 |
| 14 | 58105 | Fargo | ND | Zone 1 (highest potential) | 67/100 |
| 15 | 58501 | Bismarck | ND | Zone 1 (highest potential) | 67/100 |
| 16 | 58503 | Bismarck | ND | Zone 1 (highest potential) | 67/100 |
| 17 | 58504 | Bismarck | ND | Zone 1 (highest potential) | 67/100 |
| 18 | 58521 | Baldwin | ND | Zone 1 (highest potential) | 67/100 |
| 19 | 58523 | Beulah | ND | Zone 1 (highest potential) | 67/100 |
| 20 | 58634 | Grassy Butte | ND | Zone 1 (highest potential) | 67/100 |
| 21 | 58718 | Berthold | ND | Zone 1 (highest potential) | 67/100 |
| 22 | 58727 | Columbus | ND | Zone 1 (highest potential) | 67/100 |
| 23 | 58734 | Donnybrook | ND | Zone 1 (highest potential) | 67/100 |
| 24 | 58001 | Abercrombie | ND | Zone 1 (highest potential) | — |
| 25 | 58002 | Absaraka | ND | Zone 1 (highest potential) | — |
| 26 | 58004 | Amenia | ND | Zone 1 (highest potential) | — |
| 27 | 58005 | Argusville | ND | Zone 1 (highest potential) | — |
| 28 | 58006 | Arthur | ND | Zone 1 (highest potential) | — |
| 29 | 58007 | Ayr | ND | Zone 1 (highest potential) | — |
| 30 | 58008 | Barney | ND | Zone 1 (highest potential) | — |
| 31 | 58009 | Blanchard | ND | Zone 1 (highest potential) | — |
| 32 | 58011 | Buffalo | ND | Zone 1 (highest potential) | — |
| 33 | 58012 | Casselton | ND | Zone 1 (highest potential) | — |
| 34 | 58013 | Cayuga | ND | Zone 1 (highest potential) | — |
| 35 | 58015 | Christine | ND | Zone 1 (highest potential) | — |
| 36 | 58016 | Clifford | ND | Zone 1 (highest potential) | — |
| 37 | 58017 | Cogswell | ND | Zone 1 (highest potential) | — |
| 38 | 58018 | Colfax | ND | Zone 1 (highest potential) | — |
| 39 | 58021 | Davenport | ND | Zone 1 (highest potential) | — |
| 40 | 58027 | Enderlin | ND | Zone 1 (highest potential) | — |
| 41 | 58029 | Erie | ND | Zone 1 (highest potential) | — |
| 42 | 58030 | Fairmount | ND | Zone 1 (highest potential) | — |
| 43 | 58031 | Fingal | ND | Zone 1 (highest potential) | — |
| 44 | 58032 | Forman | ND | Zone 1 (highest potential) | — |
| 45 | 58035 | Galesburg | ND | Zone 1 (highest potential) | — |
| 46 | 58036 | Gardner | ND | Zone 1 (highest potential) | — |
| 47 | 58038 | Grandin | ND | Zone 1 (highest potential) | — |
| 48 | 58041 | Hankinson | ND | Zone 1 (highest potential) | — |
| 49 | 58042 | Harwood | ND | Zone 1 (highest potential) | — |
| 50 | 58043 | Havana | ND | Zone 1 (highest potential) | — |
| 51 | 58045 | Hillsboro | ND | Zone 1 (highest potential) | — |
| 52 | 58046 | Hope | ND | Zone 1 (highest potential) | — |
| 53 | 58048 | Hunter | ND | Zone 1 (highest potential) | — |
| 54 | 58049 | Kathryn | ND | Zone 1 (highest potential) | — |
| 55 | 58052 | Leonard | ND | Zone 1 (highest potential) | — |
| 56 | 58053 | Lidgerwood | ND | Zone 1 (highest potential) | — |
| 57 | 58054 | Lisbon | ND | Zone 1 (highest potential) | — |
| 58 | 58056 | Luverne | ND | Zone 1 (highest potential) | — |
| 59 | 58057 | Mcleod | ND | Zone 1 (highest potential) | — |
| 60 | 58058 | Mantador | ND | Zone 1 (highest potential) | — |
| 61 | 58059 | Mapleton | ND | Zone 1 (highest potential) | — |
| 62 | 58060 | Milnor | ND | Zone 1 (highest potential) | — |
| 63 | 58061 | Mooreton | ND | Zone 1 (highest potential) | — |
| 64 | 58062 | Nome | ND | Zone 1 (highest potential) | — |
| 65 | 58063 | Oriska | ND | Zone 1 (highest potential) | — |
| 66 | 58065 | Pillsbury | ND | Zone 1 (highest potential) | — |
| 67 | 58067 | Rutland | ND | Zone 1 (highest potential) | — |
| 68 | 58068 | Sheldon | ND | Zone 1 (highest potential) | — |
| 69 | 58069 | Stirum | ND | Zone 1 (highest potential) | — |
| 70 | 58072 | Valley City | ND | Zone 1 (highest potential) | — |
| 71 | 58074 | Wahpeton | ND | Zone 1 (highest potential) | — |
| 72 | 58075 | Wahpeton | ND | Zone 1 (highest potential) | — |
| 73 | 58076 | Wahpeton | ND | Zone 1 (highest potential) | — |
| 74 | 58077 | Walcott | ND | Zone 1 (highest potential) | — |
| 75 | 58079 | Wheatland | ND | Zone 1 (highest potential) | — |
| 76 | 58081 | Wyndmere | ND | Zone 1 (highest potential) | — |
| 77 | 58106 | Fargo | ND | Zone 1 (highest potential) | — |
| 78 | 58107 | Fargo | ND | Zone 1 (highest potential) | — |
| 79 | 58108 | Fargo | ND | Zone 1 (highest potential) | — |
| 80 | 58109 | Fargo | ND | Zone 1 (highest potential) | — |
| 81 | 58121 | Fargo | ND | Zone 1 (highest potential) | — |
| 82 | 58122 | Fargo | ND | Zone 1 (highest potential) | — |
| 83 | 58124 | Fargo | ND | Zone 1 (highest potential) | — |
| 84 | 58125 | Fargo | ND | Zone 1 (highest potential) | — |
| 85 | 58126 | Fargo | ND | Zone 1 (highest potential) | — |
| 86 | 58201 | Grand Forks | ND | Zone 1 (highest potential) | — |
| 87 | 58202 | Grand Forks | ND | Zone 1 (highest potential) | — |
| 88 | 58203 | Grand Forks | ND | Zone 1 (highest potential) | — |
| 89 | 58204 | Grand Forks Afb | ND | Zone 1 (highest potential) | — |
| 90 | 58205 | Grand Forks Afb | ND | Zone 1 (highest potential) | — |
| 91 | 58206 | Grand Forks | ND | Zone 1 (highest potential) | — |
| 92 | 58207 | Grand Forks | ND | Zone 1 (highest potential) | — |
| 93 | 58208 | Grand Forks | ND | Zone 1 (highest potential) | — |
| 94 | 58210 | Adams | ND | Zone 1 (highest potential) | — |
| 95 | 58212 | Aneta | ND | Zone 1 (highest potential) | — |
| 96 | 58214 | Arvilla | ND | Zone 1 (highest potential) | — |
| 97 | 58216 | Bathgate | ND | Zone 1 (highest potential) | — |
| 98 | 58218 | Buxton | ND | Zone 1 (highest potential) | — |
| 99 | 58219 | Caledonia | ND | Zone 1 (highest potential) | — |
| 100 | 58220 | Cavalier | ND | 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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