Out of 1,064 ZIP codes with data in Iowa, these are the lowest-ranked areas for gas risk score. See also: National Safest ZIP Codes for Gas & CO Risk | All Iowa Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 1,064 |
| Lowest value | 0/100 |
| Median value | 0/100 |
| State | Iowa |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Gas Risk Score | Safety Score |
|---|---|---|---|---|---|
| 1 | 50001 | Ackworth | IA | 0/100 | — |
| 2 | 50002 | Adair | IA | 0/100 | — |
| 3 | 50005 | Albion | IA | 0/100 | — |
| 4 | 50006 | Alden | IA | 0/100 | — |
| 5 | 50008 | Allerton | IA | 0/100 | — |
| 6 | 50010 | Ames | IA | 0/100 | — |
| 7 | 50012 | Ames | IA | 0/100 | — |
| 8 | 50013 | Ames | IA | 0/100 | — |
| 9 | 50014 | Ames | IA | 0/100 | — |
| 10 | 50020 | Anita | IA | 0/100 | — |
| 11 | 50022 | Atlantic | IA | 0/100 | — |
| 12 | 50025 | Audubon | IA | 0/100 | — |
| 13 | 50026 | Bagley | IA | 0/100 | — |
| 14 | 50027 | Barnes City | IA | 0/100 | — |
| 15 | 50029 | Bayard | IA | 0/100 | — |
| 16 | 50031 | Beaver | IA | 0/100 | — |
| 17 | 50034 | Blairsburg | IA | 0/100 | — |
| 18 | 50036 | Boone | IA | 0/100 | — |
| 19 | 50040 | Boxholm | IA | 0/100 | — |
| 20 | 50042 | Brayton | IA | 0/100 | — |
| 21 | 50044 | Bussey | IA | 0/100 | — |
| 22 | 50046 | Cambridge | IA | 0/100 | — |
| 23 | 50047 | Carlisle | IA | 0/100 | — |
| 24 | 50048 | Casey | IA | 0/100 | — |
| 25 | 50049 | Chariton | IA | 0/100 | — |
| 26 | 50050 | Churdan | IA | 0/100 | — |
| 27 | 50051 | Clemons | IA | 0/100 | — |
| 28 | 50052 | Clio | IA | 0/100 | — |
| 29 | 50055 | Collins | IA | 0/100 | — |
| 30 | 50056 | Colo | IA | 0/100 | — |
| 31 | 50057 | Columbia | IA | 0/100 | — |
| 32 | 50058 | Coon Rapids | IA | 0/100 | — |
| 33 | 50060 | Corydon | IA | 0/100 | — |
| 34 | 50061 | Cumming | IA | 0/100 | — |
| 35 | 50062 | Melcher-dallas | IA | 0/100 | — |
| 36 | 50064 | Dana | IA | 0/100 | — |
| 37 | 50065 | Davis City | IA | 0/100 | — |
| 38 | 50067 | Decatur | IA | 0/100 | — |
| 39 | 50068 | Derby | IA | 0/100 | — |
| 40 | 50070 | Dexter | IA | 0/100 | — |
| 41 | 50071 | Dows | IA | 0/100 | — |
| 42 | 50072 | Earlham | IA | 0/100 | — |
| 43 | 50074 | Ellston | IA | 0/100 | — |
| 44 | 50075 | Ellsworth | IA | 0/100 | — |
| 45 | 50076 | Exira | IA | 0/100 | — |
| 46 | 50078 | Ferguson | IA | 0/100 | — |
| 47 | 50101 | Galt | IA | 0/100 | — |
| 48 | 50102 | Garden City | IA | 0/100 | — |
| 49 | 50103 | Garden Grove | IA | 0/100 | — |
| 50 | 50104 | Gibson | IA | 0/100 | — |
| 51 | 50105 | Gilbert | IA | 0/100 | — |
| 52 | 50106 | Gilman | IA | 0/100 | — |
| 53 | 50107 | Grand Junction | IA | 0/100 | — |
| 54 | 50108 | Grand River | IA | 0/100 | — |
| 55 | 50112 | Grinnell | IA | 0/100 | — |
| 56 | 50115 | Guthrie Center | IA | 0/100 | — |
| 57 | 50116 | Hamilton | IA | 0/100 | — |
| 58 | 50117 | Hamlin | IA | 0/100 | — |
| 59 | 50118 | Hartford | IA | 0/100 | — |
| 60 | 50119 | Harvey | IA | 0/100 | — |
| 61 | 50120 | Haverhill | IA | 0/100 | — |
| 62 | 50122 | Hubbard | IA | 0/100 | — |
| 63 | 50123 | Humeston | IA | 0/100 | — |
| 64 | 50124 | Huxley | IA | 0/100 | — |
| 65 | 50125 | Indianola | IA | 0/100 | — |
| 66 | 50126 | Iowa Falls | IA | 0/100 | — |
| 67 | 50128 | Jamaica | IA | 0/100 | — |
| 68 | 50129 | Jefferson | IA | 0/100 | — |
| 69 | 50130 | Jewell | IA | 0/100 | — |
| 70 | 50132 | Kamrar | IA | 0/100 | — |
| 71 | 50133 | Kellerton | IA | 0/100 | — |
| 72 | 50134 | Kelley | IA | 0/100 | — |
| 73 | 50136 | Keswick | IA | 0/100 | — |
| 74 | 50138 | Knoxville | IA | 0/100 | — |
| 75 | 50139 | Lacona | IA | 0/100 | — |
| 76 | 50140 | Lamoni | IA | 0/100 | — |
| 77 | 50141 | Laurel | IA | 0/100 | — |
| 78 | 50142 | Le Grand | IA | 0/100 | — |
| 79 | 50143 | Leighton | IA | 0/100 | — |
| 80 | 50144 | Leon | IA | 0/100 | — |
| 81 | 50145 | Liberty Center | IA | 0/100 | — |
| 82 | 50147 | Lineville | IA | 0/100 | — |
| 83 | 50148 | Liscomb | IA | 0/100 | — |
| 84 | 50149 | Lorimor | IA | 0/100 | — |
| 85 | 50150 | Lovilia | IA | 0/100 | — |
| 86 | 50151 | Lucas | IA | 0/100 | — |
| 87 | 50152 | Luther | IA | 0/100 | — |
| 88 | 50154 | Mc Callsburg | IA | 0/100 | — |
| 89 | 50155 | Macksburg | IA | 0/100 | — |
| 90 | 50156 | Madrid | IA | 0/100 | — |
| 91 | 50157 | Malcom | IA | 0/100 | — |
| 92 | 50158 | Marshalltown | IA | 0/100 | — |
Methodology
Safest gas rankings show ZIP codes with the lowest PHMSA gas distribution incident risk scores. A score of 0-5 means the county has no or very few recorded incidents since 2004. Low scores indicate fewer recorded historical incidents; they do not measure infrastructure condition, and areas with little gas distribution have few incidents to record.
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: 2026-10-19.
Frequently Asked Questions
What makes an area safe from gas incidents?
Low gas risk areas typically have newer pipeline infrastructure, fewer distribution lines per capita, or areas that rely less on natural gas for heating. However, individual home safety still depends on appliance maintenance and CO detector placement.
Should I still install CO detectors in low-risk areas?
Yes. The CPSC recommends CO detectors in every home regardless of area risk. Carbon monoxide can come from any fuel-burning appliance — furnaces, water heaters, fireplaces, generators, and even attached garages.
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