Out of 42,675 ZIP codes with data across all 50 states, these are the lowest-ranked areas for gas risk score. Each ZIP links to a full safety report with water quality, lead, radon, and flood data.
| Statistic | Value |
|---|---|
| ZIP codes ranked | 42,675 |
| Lowest value | 0/100 |
| Median value | 0/100 |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Gas Risk Score | Safety Score |
|---|---|---|---|---|---|
| 1 | 00601 | Adjuntas Municipio County | PR | 0/100 | — |
| 2 | 00602 | Aguada Municipio County | PR | 0/100 | — |
| 3 | 00610 | Añasco Municipio County | PR | 0/100 | — |
| 4 | 00612 | Arecibo Municipio County | PR | 0/100 | — |
| 5 | 00616 | Arecibo Municipio County | PR | 0/100 | — |
| 6 | 00617 | Manatí Municipio County | PR | 0/100 | — |
| 7 | 00622 | Camuy Municipio County | PR | 0/100 | — |
| 8 | 00627 | Camuy Municipio County | PR | 0/100 | — |
| 9 | 00646 | Guayama Municipio County | PR | 0/100 | — |
| 10 | 00650 | Guayanilla Municipio County | PR | 0/100 | — |
| 11 | 00653 | Guánica Municipio County | PR | 0/100 | — |
| 12 | 00656 | Guayanilla Municipio County | PR | 0/100 | — |
| 13 | 00667 | Lajas Municipio County | PR | 0/100 | — |
| 14 | 00674 | Manatí Municipio County | PR | 0/100 | — |
| 15 | 00698 | Yauco Municipio County | PR | 0/100 | — |
| 16 | 00704 | Guayama Municipio County | PR | 0/100 | — |
| 17 | 00707 | Maunabo Municipio County | PR | 0/100 | — |
| 18 | 00715 | Ponce Municipio County | PR | 0/100 | — |
| 19 | 00716 | Ponce Municipio County | PR | 0/100 | — |
| 20 | 00717 | Ponce Municipio County | PR | 0/100 | — |
| 21 | 00723 | Patillas Municipio County | PR | 0/100 | — |
| 22 | 00728 | Ponce Municipio County | PR | 0/100 | — |
| 23 | 00729 | Loíza Municipio County | PR | 0/100 | — |
| 24 | 00730 | Ponce Municipio County | PR | 0/100 | — |
| 25 | 00731 | Ponce Municipio County | PR | 0/100 | — |
| 26 | 00738 | Fajardo Municipio County | PR | 0/100 | — |
| 27 | 00740 | Fajardo Municipio County | PR | 0/100 | — |
| 28 | 00741 | Humacao Municipio County | PR | 0/100 | — |
| 29 | 00751 | Toa Baja Municipio County | PR | 0/100 | — |
| 30 | 00754 | Toa Baja Municipio County | PR | 0/100 | — |
| 31 | 00757 | Fajardo Municipio County | PR | 0/100 | — |
| 32 | 00767 | Humacao Municipio County | PR | 0/100 | — |
| 33 | 00769 | Coamo Municipio County | PR | 0/100 | — |
| 34 | 00771 | Las Piedras Municipio County | PR | 0/100 | — |
| 35 | 00772 | Loíza Municipio County | PR | 0/100 | — |
| 36 | 00775 | Culebra Municipio County | PR | 0/100 | — |
| 37 | 00784 | Guayama Municipio County | PR | 0/100 | — |
| 38 | 00791 | Humacao Municipio County | PR | 0/100 | — |
| 39 | 00794 | Guayama Municipio County | PR | 0/100 | — |
| 40 | 00795 | Ponce Municipio County | PR | 0/100 | — |
| 41 | 00907 | Bayamón Municipio County | PR | 0/100 | — |
| 42 | 00913 | Carolina Municipio County | PR | 0/100 | — |
| 43 | 00915 | Carolina Municipio County | PR | 0/100 | — |
| 44 | 00917 | Toa Baja Municipio County | PR | 0/100 | — |
| 45 | 00918 | Bayamón Municipio County | PR | 0/100 | — |
| 46 | 00920 | Bayamón Municipio County | PR | 0/100 | — |
| 47 | 00921 | Bayamón Municipio County | PR | 0/100 | — |
Rankings by State
| State | ZIP Codes Ranked |
|---|---|
| Texas | 2,728 |
| California | 2,672 |
| New York | 2,260 |
| Pennsylvania | 2,249 |
| Florida | 1,669 |
| Illinois | 1,610 |
| Ohio | 1,453 |
| Virginia | 1,273 |
| Missouri | 1,194 |
| Michigan | 1,179 |
| North Carolina | 1,132 |
| Iowa | 1,064 |
| Minnesota | 1,023 |
| Kentucky | 994 |
| Georgia | 987 |
| Indiana | 986 |
| West Virginia | 938 |
| Wisconsin | 902 |
| Alabama | 845 |
| Louisiana | 801 |
| Tennessee | 792 |
| Oklahoma | 774 |
| New Jersey | 769 |
| Kansas | 755 |
| Massachusetts | 742 |
| Washington | 732 |
| Arkansas | 711 |
| Colorado | 660 |
| Maryland | 630 |
| Nebraska | 625 |
| South Carolina | 565 |
| Mississippi | 564 |
| Arizona | 556 |
| Maine | 504 |
| Oregon | 483 |
| Connecticut | 442 |
| New Mexico | 429 |
| North Dakota | 413 |
| Montana | 408 |
| South Dakota | 397 |
| Utah | 350 |
| Idaho | 324 |
| Vermont | 312 |
| District of Columbia | 286 |
| New Hampshire | 284 |
| Alaska | 274 |
| Nevada | 254 |
| Wyoming | 195 |
| Hawaii | 140 |
| Delaware | 104 |
| Rhode Island | 93 |
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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