Worst Infrastructure: Pennsylvania

Out of 1,998 ZIP codes with infrastructure data in Pennsylvania, these areas face the highest estimated risk of water pipe failure based on infrastructure age, funding gaps, and violation history.

Statistic	Value
ZIP codes ranked	1,998
Highest risk	74%
Median risk	47%
Average risk	46%
State	Pennsylvania

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	19083	Havertown	PA	74%	Very High	10/100
2	15544	Gray	PA	68%	Very High	40/100
3	15960	Twin Rocks	PA	68%	Very High	49/100
4	19375	Unionville	PA	68%	Very High	50/100
5	15104	Braddock	PA	67%	Very High	34/100
6	15902	Johnstown	PA	67%	Very High	70/100
7	15906	Johnstown	PA	67%	Very High	70/100
8	16049	Parker	PA	67%	Very High	15/100
9	15030	Creighton	PA	66%	Very High	38/100
10	15737	Elmora	PA	66%	Very High	65/100
11	15901	Johnstown	PA	66%	Very High	70/100
12	18447	Olyphant	PA	66%	Very High	21/100
13	15003	Ambridge	PA	65%	Very High	54/100
14	15474	Point Marion	PA	65%	Very High	45/100
15	17056	Mexico	PA	65%	Very High	55/100
16	17534	Intercourse	PA	65%	Very High	51/100
17	18950	Point Pleasant	PA	65%	Very High	44/100
18	15059	Midland	PA	64%	Very High	42/100
19	15905	Johnstown	PA	64%	Very High	65/100
20	16230	Hawthorn	PA	64%	Very High	57/100
21	16726	Cyclone	PA	64%	Very High	39/100
22	16940	Nelson	PA	64%	Very High	48/100
23	15466	Newell	PA	63%	Very High	71/100
24	15847	Knox Dale	PA	63%	Very High	57/100
25	15909	Johnstown	PA	63%	Very High	80/100
26	18030	Bowmanstown	PA	63%	Very High	38/100
27	15331	Ellsworth	PA	62%	Very High	65/100
28	16036	Foxburg	PA	62%	Very High	58/100
29	17401	York	PA	62%	Very High	58/100
30	17952	Mary D	PA	62%	Very High	54/100
31	18240	Nesquehoning	PA	62%	Very High	43/100
32	18252	Tamaqua	PA	62%	Very High	47/100
33	15110	Duquesne	PA	61%	Very High	67/100
34	16631	Curryville	PA	61%	Very High	52/100
35	16835	Fleming	PA	61%	Very High	55/100
36	17048	Lykens	PA	61%	Very High	46/100
37	17253	Saltillo	PA	61%	Very High	40/100
38	18063	Martins Creek	PA	61%	Very High	54/100
39	18349	Pocono Manor	PA	61%	Very High	26/100
40	18651	Plymouth	PA	61%	Very High	31/100
41	15056	Leetsdale	PA	60%	High	63/100
42	15087	Webster	PA	60%	High	55/100
43	15204	Pittsburgh	PA	60%	High	69/100
44	15207	Pittsburgh	PA	60%	High	59/100
45	15208	Pittsburgh	PA	60%	High	69/100
46	15210	Pittsburgh	PA	60%	High	64/100
47	15212	Pittsburgh	PA	60%	High	59/100
48	15216	Pittsburgh	PA	60%	High	69/100
49	15316	Brave	PA	60%	High	64/100
50	15353	Nineveh	PA	60%	High	63/100
51	15435	Fairbank	PA	60%	High	55/100
52	15447	Isabella	PA	60%	High	53/100
53	15450	La Belle	PA	60%	High	53/100
54	15552	Meyersdale	PA	60%	High	34/100
55	15635	Hannastown	PA	60%	High	40/100
56	15638	Hostetter	PA	60%	High	40/100
57	15647	Larimer	PA	60%	High	53/100
58	15729	Commodore	PA	60%	High	36/100
59	15754	Lucernemines	PA	60%	High	40/100
60	15863	Stump Creek	PA	60%	High	73/100
61	15927	Colver	PA	60%	High	73/100
62	15953	Seanor	PA	60%	High	53/100
63	16344	Rouseville	PA	60%	High	48/100
64	16633	Defiance	PA	60%	High	52/100
65	16654	Huntingdon	PA	60%	High	62/100
66	16686	Tyrone	PA	60%	High	34/100
67	16727	Derrick City	PA	60%	High	53/100
68	17039	Kleinfeltersville	PA	60%	High	40/100
69	17075	Newton Hamilton	PA	60%	High	55/100
70	17076	Oakland Mills	PA	60%	High	40/100
71	17080	Pillow	PA	60%	High	59/100
72	17098	Williamstown	PA	60%	High	46/100
73	17250	Rouzerville	PA	60%	High	53/100
74	17343	Mc Knightstown	PA	60%	High	53/100
75	17504	Bausman	PA	60%	High	40/100
76	17872	Shamokin	PA	60%	High	51/100
77	17954	Minersville	PA	60%	High	38/100
78	18603	Berwick	PA	60%	High	21/100
79	18628	Lopez	PA	60%	High	32/100
80	18970	Trumbauersville	PA	60%	High	53/100
81	15022	Charleroi	PA	59%	High	71/100
82	15211	Pittsburgh	PA	59%	High	69/100
83	15218	Pittsburgh	PA	59%	High	69/100
84	15223	Pittsburgh	PA	59%	High	54/100
85	15225	Pittsburgh	PA	59%	High	64/100
86	15226	Pittsburgh	PA	59%	High	64/100
87	15315	Bobtown	PA	59%	High	63/100
88	15333	Fredericktown	PA	59%	High	61/100
89	15443	Hibbs	PA	59%	High	53/100
90	15760	Marsteller	PA	59%	High	69/100
91	15778	Timblin	PA	59%	High	40/100
92	15779	Torrance	PA	59%	High	50/100
93	15868	Weedville	PA	59%	High	50/100
94	16172	New Wilmington	PA	59%	High	82/100
95	16682	Sproul	PA	59%	High	27/100
96	17311	Codorus	PA	59%	High	40/100
97	17835	Laurelton	PA	59%	High	53/100
98	17944	Llewellyn	PA	59%	High	53/100
99	17945	Locustdale	PA	59%	High	40/100
100	17948	Mahanoy City	PA	59%	High	69/100

Methodology

Infrastructure risk rankings combine four data sources, each weighted equally (25%): (1) EPA Drinking Water Infrastructure Needs Survey (DWINS 2023) — state-level 20-year funding gap per capita for pipe replacement, treatment, and storage; (2) Census ACS housing vintage — percentage of homes built before 1980, when lead solder and galvanized pipes were common; (3) EPA SDWIS violation and enforcement data — system-level compliance history; (4) Lead and Copper Rule indicators — service line material inventories and 90th percentile lead testing results. The combined score is normalized to a 0-100% probability scale.

Data sources: EPA DWINS 2023, Census ACS, EPA SDWIS, Lead and Copper Rule data. Last updated: 2026-06-04.

Frequently Asked Questions

What does pipe failure probability mean?

Pipe failure probability estimates the likelihood of water main breaks, lead contamination from corroded pipes, or service disruptions based on infrastructure age, state funding gaps, violation history, and lead indicators. It is not a prediction of imminent failure, but a risk assessment based on known factors.

How is infrastructure risk calculated?

The risk score combines four equally weighted factors: state-level infrastructure funding gap per capita (from EPA DWINS 2023), housing vintage (Census ACS pre-1980 housing percentage), water system violation and enforcement history (EPA SDWIS), and lead exposure indicators (service line probability and testing results).

What can homeowners do about aging infrastructure?

Test your tap water annually, especially for lead. Check if your home has a lead service line through your water utility. Consider a whole-house water filter (NSF/ANSI 53 certified). Review your water system Consumer Confidence Report for violation history.

Does high risk mean my water is unsafe right now?

Not necessarily. Infrastructure risk indicates long-term vulnerability, not current contamination. However, areas with aging pipes and high violation counts have a statistically higher chance of water quality issues. Regular testing is the best way to verify your water safety.

Worst Infrastructure: Pennsylvania — 2026 Rankings