Worst Infrastructure: Arizona — 2026 Rankings

Out of 411 ZIP codes with infrastructure data in Arizona, 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	411
Highest risk	NaN%
Median risk	NaN%
Average risk	NaN%
State	Arizona

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	85003	Phoenix	AZ	NaN%	Unknown	74/100
2	85004	Phoenix	AZ	NaN%	Unknown	74/100
3	85006	Phoenix	AZ	NaN%	Unknown	74/100
4	85007	Phoenix	AZ	NaN%	Unknown	74/100
5	85008	Phoenix	AZ	NaN%	Unknown	74/100
6	85009	Phoenix	AZ	NaN%	Unknown	74/100
7	85012	Phoenix	AZ	NaN%	Unknown	74/100
8	85013	Phoenix	AZ	NaN%	Unknown	74/100
9	85014	Phoenix	AZ	NaN%	Unknown	74/100
10	85015	Phoenix	AZ	NaN%	Unknown	74/100
11	85016	Phoenix	AZ	NaN%	Unknown	74/100
12	85017	Phoenix	AZ	NaN%	Unknown	74/100
13	85018	Phoenix	AZ	NaN%	Unknown	73/100
14	85019	Phoenix	AZ	NaN%	Unknown	74/100
15	85020	Phoenix	AZ	NaN%	Unknown	74/100
16	85021	Phoenix	AZ	NaN%	Unknown	74/100
17	85022	Phoenix	AZ	NaN%	Unknown	74/100
18	85023	Phoenix	AZ	NaN%	Unknown	74/100
19	85024	Phoenix	AZ	NaN%	Unknown	74/100
20	85026	Phoenix	AZ	NaN%	Unknown	—
21	85027	Phoenix	AZ	NaN%	Unknown	72/100
22	85028	Phoenix	AZ	NaN%	Unknown	74/100
23	85029	Phoenix	AZ	NaN%	Unknown	74/100
24	85031	Phoenix	AZ	NaN%	Unknown	74/100
25	85032	Phoenix	AZ	NaN%	Unknown	74/100
26	85033	Phoenix	AZ	NaN%	Unknown	74/100
27	85034	Phoenix	AZ	NaN%	Unknown	74/100
28	85035	Phoenix	AZ	NaN%	Unknown	74/100
29	85037	Phoenix	AZ	NaN%	Unknown	74/100
30	85040	Phoenix	AZ	NaN%	Unknown	74/100
31	85041	Phoenix	AZ	NaN%	Unknown	74/100
32	85042	Phoenix	AZ	NaN%	Unknown	74/100
33	85043	Phoenix	AZ	NaN%	Unknown	66/100
34	85044	Phoenix	AZ	NaN%	Unknown	74/100
35	85045	Phoenix	AZ	NaN%	Unknown	74/100
36	85048	Phoenix	AZ	NaN%	Unknown	74/100
37	85050	Phoenix	AZ	NaN%	Unknown	73/100
38	85051	Phoenix	AZ	NaN%	Unknown	74/100
39	85053	Phoenix	AZ	NaN%	Unknown	74/100
40	85054	Phoenix	AZ	NaN%	Unknown	74/100
41	85083	Phoenix	AZ	NaN%	Unknown	70/100
42	85085	Phoenix	AZ	NaN%	Unknown	74/100
43	85086	Phoenix	AZ	NaN%	Unknown	71/100
44	85087	New River	AZ	NaN%	Unknown	71/100
45	85118	Gold Canyon	AZ	NaN%	Unknown	—
46	85119	Apache Junction	AZ	NaN%	Unknown	58/100
47	85120	Apache Junction	AZ	NaN%	Unknown	58/100
48	85121	Bapchule	AZ	NaN%	Unknown	—
49	85122	Casa Grande	AZ	NaN%	Unknown	74/100
50	85123	Arizona City	AZ	NaN%	Unknown	—
51	85128	Coolidge	AZ	NaN%	Unknown	71/100
52	85131	Eloy	AZ	NaN%	Unknown	58/100
53	85132	Florence	AZ	NaN%	Unknown	42/100
54	85135	Hayden	AZ	NaN%	Unknown	—
55	85137	Kearny	AZ	NaN%	Unknown	—
56	85138	Maricopa	AZ	NaN%	Unknown	58/100
57	85139	Maricopa	AZ	NaN%	Unknown	58/100
58	85140	San Tan Valley	AZ	NaN%	Unknown	64/100
59	85141	Picacho	AZ	NaN%	Unknown	—
60	85142	Queen Creek	AZ	NaN%	Unknown	42/100
61	85143	San Tan Valley	AZ	NaN%	Unknown	65/100
62	85145	Red Rock	AZ	NaN%	Unknown	—
63	85147	Sacaton	AZ	NaN%	Unknown	—
64	85172	Stanfield	AZ	NaN%	Unknown	73/100
65	85173	Superior	AZ	NaN%	Unknown	—
66	85191	Valley Farms	AZ	NaN%	Unknown	—
67	85192	Winkelman	AZ	NaN%	Unknown	—
68	85193	Casa Grande	AZ	NaN%	Unknown	—
69	85194	Casa Grande	AZ	NaN%	Unknown	—
70	85201	Mesa	AZ	NaN%	Unknown	66/100
71	85202	Mesa	AZ	NaN%	Unknown	66/100
72	85203	Mesa	AZ	NaN%	Unknown	66/100
73	85204	Mesa	AZ	NaN%	Unknown	66/100
74	85205	Mesa	AZ	NaN%	Unknown	66/100
75	85206	Mesa	AZ	NaN%	Unknown	42/100
76	85207	Mesa	AZ	NaN%	Unknown	66/100
77	85208	Mesa	AZ	NaN%	Unknown	66/100
78	85209	Mesa	AZ	NaN%	Unknown	58/100
79	85210	Mesa	AZ	NaN%	Unknown	66/100
80	85212	Mesa	AZ	NaN%	Unknown	42/100
81	85213	Mesa	AZ	NaN%	Unknown	66/100
82	85215	Mesa	AZ	NaN%	Unknown	66/100
83	85224	Chandler	AZ	NaN%	Unknown	58/100
84	85225	Chandler	AZ	NaN%	Unknown	58/100
85	85226	Chandler	AZ	NaN%	Unknown	58/100
86	85233	Gilbert	AZ	NaN%	Unknown	42/100
87	85234	Gilbert	AZ	NaN%	Unknown	42/100
88	85236	Higley	AZ	NaN%	Unknown	42/100
89	85248	Chandler	AZ	NaN%	Unknown	58/100
90	85249	Chandler	AZ	NaN%	Unknown	58/100
91	85250	Scottsdale	AZ	NaN%	Unknown	73/100
92	85251	Scottsdale	AZ	NaN%	Unknown	72/100
93	85253	Paradise Valley	AZ	NaN%	Unknown	71/100
94	85254	Scottsdale	AZ	NaN%	Unknown	73/100
95	85255	Scottsdale	AZ	NaN%	Unknown	73/100
96	85256	Scottsdale	AZ	NaN%	Unknown	—
97	85257	Scottsdale	AZ	NaN%	Unknown	74/100
98	85258	Scottsdale	AZ	NaN%	Unknown	74/100
99	85259	Scottsdale	AZ	NaN%	Unknown	72/100
100	85260	Scottsdale	AZ	NaN%	Unknown	73/100

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: 2026-08-31.

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.