2026 Rankings

Safest ZIP Codes for Gas & CO Risk in Connecticut — ...

Last updated: June 4, 2026

442 ZIP codes ranked by Gas Risk Score #1: ZIP 06018 (Canaan, CT) — 0/100
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

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 82/100
2 06021 Colebrook CT 0/100 63/100
3 06024 East Canaan CT 0/100 63/100
4 06029 Ellington CT 0/100 73/100
5 06031 Falls Village CT 0/100 63/100
6 06039 Lakeville CT 0/100 78/100
7 06043 Bolton CT 0/100 67/100
8 06057 New Hartford CT 0/100 74/100
9 06058 Norfolk CT 0/100 75/100
10 06061 Pine Meadow CT 0/100 53/100
11 06063 Barkhamsted CT 0/100 77/100
12 06066 Vernon Rockville CT 0/100 65/100
13 06068 Salisbury CT 0/100 82/100
14 06069 Sharon CT 0/100 74/100
15 06071 Somers CT 0/100 70/100
16 06072 Somersville CT 0/100 53/100
17 06076 Stafford Springs CT 0/100 61/100
18 06077 Staffordville CT 0/100 53/100
19 06079 Taconic CT 0/100 53/100
20 06084 Tolland CT 0/100 70/100
21 06094 Winchester Center CT 0/100 53/100
22 06098 Winsted CT 0/100 83/100
23 06226 Willimantic CT 0/100 74/100
24 06230 Abington CT 0/100 53/100
25 06231 Amston CT 0/100 63/100
26 06232 Andover CT 0/100 74/100
27 06233 Ballouville CT 0/100 53/100
28 06234 Brooklyn CT 0/100 68/100
29 06235 Chaplin CT 0/100 54/100
30 06237 Columbia CT 0/100 77/100
31 06238 Coventry CT 0/100 76/100
32 06239 Danielson CT 0/100 82/100
33 06241 Dayville CT 0/100 41/100
34 06242 Eastford CT 0/100 63/100
35 06243 East Killingly CT 0/100 53/100
36 06244 East Woodstock CT 0/100 53/100
37 06245 Fabyan CT 0/100 53/100
38 06246 Grosvenor Dale CT 0/100 63/100
39 06247 Hampton CT 0/100 63/100
40 06248 Hebron CT 0/100 78/100
41 06249 Lebanon CT 0/100 62/100
42 06250 Mansfield Center CT 0/100 78/100
43 06251 Mansfield Depot CT 0/100 63/100
44 06254 North Franklin CT 0/100 45/100
45 06255 North Grosvenordale CT 0/100 63/100
46 06256 North Windham CT 0/100 53/100
47 06258 Pomfret CT 0/100 50/100
48 06259 Pomfret Center CT 0/100 78/100
49 06260 Putnam CT 0/100 71/100
50 06262 Quinebaug CT 0/100 78/100
51 06263 Rogers CT 0/100 53/100
52 06264 Scotland CT 0/100 53/100
53 06265 South Willington CT 0/100 53/100
54 06266 South Windham CT 0/100 53/100
55 06267 South Woodstock CT 0/100 53/100
56 06268 Storrs Mansfield CT 0/100 63/100
57 06269 Storrs Mansfield CT 0/100 53/100
58 06277 Thompson CT 0/100 74/100
59 06278 Ashford CT 0/100 74/100
60 06279 Willington CT 0/100 66/100
61 06280 Windham CT 0/100 82/100
62 06281 Woodstock CT 0/100 46/100
63 06282 Woodstock Valley CT 0/100 53/100
64 06320 New London CT 0/100 40/100
65 06325 New London County CT 0/100 —
66 06330 Baltic CT 0/100 63/100
67 06331 Canterbury CT 0/100 66/100
68 06332 Central Village CT 0/100 53/100
69 06333 East Lyme CT 0/100 59/100
70 06334 Bozrah CT 0/100 63/100
71 06335 Gales Ferry CT 0/100 56/100
72 06336 Gilman CT 0/100 40/100
73 06338 Mashantucket CT 0/100 64/100
74 06339 Ledyard CT 0/100 50/100
75 06340 Groton CT 0/100 43/100
76 06349 Groton CT 0/100 54/100
77 06350 Hanover CT 0/100 40/100
78 06351 Jewett City CT 0/100 60/100
79 06353 Montville CT 0/100 60/100
80 06354 Moosup CT 0/100 63/100
81 06355 Mystic CT 0/100 51/100
82 06357 Niantic CT 0/100 52/100
83 06359 North Stonington CT 0/100 62/100
84 06360 Norwich CT 0/100 49/100
85 06365 Preston CT 0/100 64/100
86 06370 Oakdale CT 0/100 66/100
87 06371 Old Lyme CT 0/100 40/100
88 06372 Old Mystic CT 0/100 45/100
89 06373 Oneco CT 0/100 83/100
90 06374 Plainfield CT 0/100 74/100
91 06375 Quaker Hill CT 0/100 64/100
92 06376 South Lyme CT 0/100 53/100
93 06377 Sterling CT 0/100 83/100
94 06378 Stonington CT 0/100 60/100
95 06379 Pawcatuck CT 0/100 45/100
96 06380 Taftville CT 0/100 63/100
97 06382 Uncasville CT 0/100 68/100
98 06383 Versailles CT 0/100 53/100
99 06384 Voluntown CT 0/100 69/100
100 06385 Waterford CT 0/100 56/100

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 areas with well-maintained gas infrastructure and minimal historical incidents.

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: 2026-06-04.

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.

Explore More Rankings

How this ranking is calculated, data sources, and limitations: Rankings Methodology →

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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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