Out of 442 ZIP codes with data in Connecticut, these are the lowest-ranked areas for gas risk score. See also: National Safest ZIP Codes for Gas & CO Risk | All Connecticut Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 442 |
| Lowest value | 0/100 |
| Median value | 1/100 |
| State | Connecticut |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Gas Risk Score | Safety Score |
|---|---|---|---|---|---|
| 1 | 06018 | Canaan | CT | 0/100 | — |
| 2 | 06021 | Colebrook | CT | 0/100 | — |
| 3 | 06024 | East Canaan | CT | 0/100 | — |
| 4 | 06029 | Ellington | CT | 0/100 | 66/100 |
| 5 | 06031 | Falls Village | CT | 0/100 | — |
| 6 | 06039 | Lakeville | CT | 0/100 | — |
| 7 | 06043 | Bolton | CT | 0/100 | — |
| 8 | 06057 | New Hartford | CT | 0/100 | 82/100 |
| 9 | 06058 | Norfolk | CT | 0/100 | — |
| 10 | 06061 | Pine Meadow | CT | 0/100 | — |
| 11 | 06063 | Barkhamsted | CT | 0/100 | — |
| 12 | 06066 | Vernon Rockville | CT | 0/100 | 64/100 |
| 13 | 06068 | Salisbury | CT | 0/100 | — |
| 14 | 06069 | Sharon | CT | 0/100 | — |
| 15 | 06071 | Somers | CT | 0/100 | 65/100 |
| 16 | 06076 | Stafford Springs | CT | 0/100 | — |
| 17 | 06084 | Tolland | CT | 0/100 | 63/100 |
| 18 | 06098 | Winsted | CT | 0/100 | 83/100 |
| 19 | 06226 | Willimantic | CT | 0/100 | 83/100 |
| 20 | 06231 | Amston | CT | 0/100 | — |
| 21 | 06232 | Andover | CT | 0/100 | — |
| 22 | 06234 | Brooklyn | CT | 0/100 | 67/100 |
| 23 | 06235 | Chaplin | CT | 0/100 | — |
| 24 | 06237 | Columbia | CT | 0/100 | — |
| 25 | 06238 | Coventry | CT | 0/100 | 77/100 |
| 26 | 06239 | Danielson | CT | 0/100 | 67/100 |
| 27 | 06241 | Dayville | CT | 0/100 | 67/100 |
| 28 | 06242 | Eastford | CT | 0/100 | — |
| 29 | 06243 | East Killingly | CT | 0/100 | — |
| 30 | 06247 | Hampton | CT | 0/100 | — |
| 31 | 06248 | Hebron | CT | 0/100 | — |
| 32 | 06249 | Lebanon | CT | 0/100 | — |
| 33 | 06250 | Mansfield Center | CT | 0/100 | 73/100 |
| 34 | 06254 | North Franklin | CT | 0/100 | — |
| 35 | 06255 | North Grosvenordale | CT | 0/100 | — |
| 36 | 06256 | North Windham | CT | 0/100 | — |
| 37 | 06258 | Pomfret | CT | 0/100 | — |
| 38 | 06259 | Pomfret Center | CT | 0/100 | — |
| 39 | 06260 | Putnam | CT | 0/100 | 60/100 |
| 40 | 06262 | Quinebaug | CT | 0/100 | — |
| 41 | 06263 | Rogers | CT | 0/100 | 67/100 |
| 42 | 06264 | Scotland | CT | 0/100 | — |
| 43 | 06266 | South Windham | CT | 0/100 | — |
| 44 | 06268 | Storrs Mansfield | CT | 0/100 | 50/100 |
| 45 | 06269 | Storrs Mansfield | CT | 0/100 | 59/100 |
| 46 | 06277 | Thompson | CT | 0/100 | 67/100 |
| 47 | 06278 | Ashford | CT | 0/100 | — |
| 48 | 06279 | Willington | CT | 0/100 | — |
| 49 | 06280 | Windham | CT | 0/100 | — |
| 50 | 06281 | Woodstock | CT | 0/100 | — |
| 51 | 06282 | Woodstock Valley | CT | 0/100 | — |
| 52 | 06320 | New London | CT | 0/100 | 64/100 |
| 53 | 06330 | Baltic | CT | 0/100 | — |
| 54 | 06331 | Canterbury | CT | 0/100 | — |
| 55 | 06332 | Central Village | CT | 0/100 | — |
| 56 | 06333 | East Lyme | CT | 0/100 | 36/100 |
| 57 | 06334 | Bozrah | CT | 0/100 | 50/100 |
| 58 | 06335 | Gales Ferry | CT | 0/100 | — |
| 59 | 06338 | Mashantucket | CT | 0/100 | 47/100 |
| 60 | 06339 | Ledyard | CT | 0/100 | — |
| 61 | 06340 | Groton | CT | 0/100 | 55/100 |
| 62 | 06350 | Hanover | CT | 0/100 | — |
| 63 | 06351 | Jewett City | CT | 0/100 | 46/100 |
| 64 | 06353 | Montville | CT | 0/100 | — |
| 65 | 06354 | Moosup | CT | 0/100 | — |
| 66 | 06355 | Mystic | CT | 0/100 | 64/100 |
| 67 | 06357 | Niantic | CT | 0/100 | 36/100 |
| 68 | 06359 | North Stonington | CT | 0/100 | — |
| 69 | 06360 | Norwich | CT | 0/100 | 50/100 |
| 70 | 06365 | Preston | CT | 0/100 | 47/100 |
| 71 | 06370 | Oakdale | CT | 0/100 | — |
| 72 | 06371 | Old Lyme | CT | 0/100 | — |
| 73 | 06373 | Oneco | CT | 0/100 | — |
| 74 | 06374 | Plainfield | CT | 0/100 | — |
| 75 | 06375 | Quaker Hill | CT | 0/100 | — |
| 76 | 06376 | South Lyme | CT | 0/100 | — |
| 77 | 06377 | Sterling | CT | 0/100 | — |
| 78 | 06378 | Stonington | CT | 0/100 | 66/100 |
| 79 | 06379 | Pawcatuck | CT | 0/100 | 50/100 |
| 80 | 06380 | Taftville | CT | 0/100 | 50/100 |
| 81 | 06382 | Uncasville | CT | 0/100 | 41/100 |
| 82 | 06384 | Voluntown | CT | 0/100 | — |
| 83 | 06385 | Waterford | CT | 0/100 | 64/100 |
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: 2026-10-15.
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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