Worst ZIP Codes for CO & Gas Safety

Out of 19,935 ZIP codes with data across all 50 states, these are the highest-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	19,935
Highest value	100/100
Median value	3/100

Top 100 Worst ZIP Codes

Rank	ZIP Code	City	State	Gas Risk Score	Safety Score
1	17087	Richland	PA	100/100	62/100
2	18011	Alburtis	PA	100/100	55/100
3	18056	Hereford	PA	100/100	40/100
4	19412	Berks County	PA	100/100	—
5	19503	Bally	PA	100/100	53/100
6	19505	Bechtelsville	PA	100/100	43/100
7	19506	Bernville	PA	100/100	61/100
8	19507	Bethel	PA	100/100	53/100
9	19508	Birdsboro	PA	100/100	59/100
10	19510	Blandon	PA	100/100	65/100
11	19511	Bowers	PA	100/100	40/100
12	19512	Boyertown	PA	100/100	59/100
13	19516	Centerport	PA	100/100	40/100
14	19518	Douglassville	PA	100/100	51/100
15	19519	Earlville	PA	100/100	53/100
16	19522	Fleetwood	PA	100/100	56/100
17	19523	Geigertown	PA	100/100	53/100
18	19526	Hamburg	PA	100/100	58/100
19	19530	Kutztown	PA	100/100	58/100
20	19533	Leesport	PA	100/100	53/100
21	19534	Lenhartsville	PA	100/100	37/100
22	19535	Limekiln	PA	100/100	40/100
23	19536	Lyon Station	PA	100/100	32/100
24	19540	Mohnton	PA	100/100	38/100
25	19541	Mohrsville	PA	100/100	53/100
26	19543	Morgantown	PA	100/100	69/100
27	19544	Mount Aetna	PA	100/100	40/100
28	19545	New Berlinville	PA	100/100	40/100
29	19547	Oley	PA	100/100	51/100
30	19548	Pine Forge	PA	100/100	53/100
31	19550	Rehrersburg	PA	100/100	31/100
32	19551	Robesonia	PA	100/100	45/100
33	19554	Shartlesville	PA	100/100	40/100
34	19555	Shoemakersville	PA	100/100	56/100
35	19559	Strausstown	PA	100/100	40/100
36	19560	Temple	PA	100/100	40/100
37	19562	Topton	PA	100/100	61/100
38	19564	Virginville	PA	100/100	53/100
39	19565	Wernersville	PA	100/100	67/100
40	19567	Womelsdorf	PA	100/100	56/100
41	19600	Berks County	PA	100/100	—
42	19601	Reading	PA	100/100	64/100
43	19602	Reading	PA	100/100	59/100
44	19603	Reading	PA	100/100	69/100
45	19604	Reading	PA	100/100	64/100
46	19605	Reading	PA	100/100	59/100
47	19606	Reading	PA	100/100	59/100
48	19607	Reading	PA	100/100	64/100
49	19608	Reading	PA	100/100	64/100
50	19609	Reading	PA	100/100	69/100
51	19610	Reading	PA	100/100	64/100
52	19611	Reading	PA	100/100	64/100
53	19612	Reading	PA	100/100	65/100
54	19640	Berks County	PA	100/100	—
55	44114	Cleveland	OH	63/100	81/100
56	44401	Berlin Center	OH	63/100	63/100
57	44405	Campbell	OH	63/100	53/100
58	44406	Canfield	OH	63/100	76/100
59	44416	Ellsworth	OH	63/100	53/100
60	44422	Greenford	OH	63/100	40/100
61	44429	Lake Milton	OH	63/100	53/100
62	44436	Lowellville	OH	63/100	53/100
63	44442	New Middletown	OH	63/100	53/100
64	44443	New Springfield	OH	63/100	40/100
65	44451	North Jackson	OH	63/100	63/100
66	44452	North Lima	OH	63/100	63/100
67	44454	Petersburg	OH	63/100	40/100
68	44471	Struthers	OH	63/100	79/100
69	44501	Youngstown	OH	63/100	80/100
70	44502	Youngstown	OH	63/100	80/100
71	44503	Youngstown	OH	63/100	80/100
72	44504	Youngstown	OH	63/100	80/100
73	44506	Youngstown	OH	63/100	80/100
74	44507	Youngstown	OH	63/100	80/100
75	44509	Youngstown	OH	63/100	80/100
76	44510	Youngstown	OH	63/100	80/100
77	44511	Youngstown	OH	63/100	80/100
78	44512	Youngstown	OH	63/100	70/100
79	44513	Youngstown	OH	63/100	80/100
80	44514	Youngstown	OH	63/100	75/100
81	44515	Youngstown	OH	63/100	70/100
82	44555	Youngstown	OH	63/100	80/100
83	44619	Damascus	OH	63/100	53/100
84	44672	Sebring	OH	63/100	71/100
85	57701	Rapid City	SD	59/100	76/100
86	57702	Rapid City	SD	59/100	76/100
87	57703	Rapid City	SD	59/100	76/100
88	57709	Rapid City	SD	59/100	80/100
89	57719	Box Elder	SD	59/100	66/100
90	57725	Caputa	SD	59/100	53/100
91	57745	Hill City	SD	59/100	83/100
92	57751	Keystone	SD	59/100	83/100
93	57761	New Underwood	SD	59/100	82/100
94	57767	Owanka	SD	59/100	83/100
95	57775	Quinn	SD	59/100	53/100
96	57780	Scenic	SD	59/100	53/100
97	57790	Wall	SD	59/100	83/100
98	20753	District Heights	MD	49/100	50/100
99	20810	Bethesda	MD	49/100	66/100
100	20811	Bethesda	MD	49/100	66/100

Rankings by State

State	ZIP Codes Ranked
California	2,462
Texas	1,660
New York	1,341
Pennsylvania	1,325
Florida	963
Ohio	845
Illinois	746
Michigan	659
New Jersey	652
Massachusetts	598
Washington	475
Indiana	463
Maryland	424
Missouri	412
Georgia	402
Colorado	392
Arizona	378
North Carolina	359
Alabama	359
Minnesota	341
Tennessee	312
Louisiana	293
Connecticut	282
Kentucky	273
Wisconsin	271
Virginia	262
Oklahoma	250
West Virginia	245
South Carolina	244
Kansas	215
Iowa	197
Nebraska	187
New Mexico	182
Oregon	181
Nevada	164
Utah	163
Arkansas	129
Mississippi	128
Montana	106
Wyoming	74
Alaska	73
Hawaii	72
South Dakota	70
Idaho	68
North Dakota	59
Delaware	52
Rhode Island	51
New Hampshire	44
Vermont	30

Methodology

Gas risk rankings use PHMSA gas distribution incident data (2004-2026), mapped to counties and ZIP codes. Risk scores (0-100) factor in total incidents, fatalities, and recency. Counties with more incidents, deaths, and recent events score highest. Data source: U.S. DOT Pipeline and Hazardous Materials Safety Administration.

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 is a gas distribution incident?

Gas distribution incidents involve failures in the local natural gas pipeline network — the pipes that carry gas from main lines to homes and businesses. These can cause explosions, fires, carbon monoxide poisoning, and property damage. PHMSA tracks all reported incidents nationally.

How can I protect my home from CO and gas leaks?

Install CO detectors on every level of your home (CPSC recommendation). Have gas appliances inspected annually by a licensed technician. Know the signs of a gas leak: rotten egg smell, hissing near gas lines, dead vegetation near pipelines. If you smell gas, leave immediately and call 911.

Worst ZIP Codes for CO & Gas Safety — 2026 Rankings