Worst Infrastructure: San Diego Metro — 2026

Out of 101 ZIP codes with infrastructure data in the San Diego metro area, 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	101
Highest risk	55%
Median risk	32%
Average risk	35%

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	92102	San Diego	CA	55%	High	60/100
2	92106	San Diego	CA	54%	High	60/100
3	92107	San Diego	CA	54%	High	60/100
4	92116	San Diego	CA	54%	High	60/100
5	92104	San Diego	CA	53%	High	65/100
6	92103	San Diego	CA	52%	High	60/100
7	92105	San Diego	CA	52%	High	60/100
8	92115	San Diego	CA	52%	High	60/100
9	92117	San Diego	CA	52%	High	60/100
10	92119	San Diego	CA	52%	High	65/100
11	92109	San Diego	CA	51%	High	55/100
12	92111	San Diego	CA	51%	High	65/100
13	92113	San Diego	CA	51%	High	55/100
14	92114	San Diego	CA	51%	High	60/100
15	92110	San Diego	CA	49%	High	60/100
16	92120	San Diego	CA	49%	High	55/100
17	92139	San Diego	CA	49%	High	65/100
18	92123	San Diego	CA	43%	High	65/100
19	92124	San Diego	CA	43%	High	65/100
20	92126	San Diego	CA	43%	High	65/100
21	92154	San Diego	CA	43%	High	60/100
22	92128	San Diego	CA	42%	High	65/100
23	92129	San Diego	CA	42%	High	65/100
24	92122	San Diego	CA	41%	High	65/100
25	92108	San Diego	CA	37%	Moderate	55/100
26	92136	San Diego	CA	37%	Moderate	60/100
27	91911	Chula Vista	CA	36%	Moderate	95/100
28	92054	Oceanside	CA	36%	Moderate	77/100
29	92121	San Diego	CA	36%	Moderate	55/100
30	92131	San Diego	CA	36%	Moderate	65/100
31	91910	Chula Vista	CA	35%	Moderate	90/100
32	92025	Escondido	CA	34%	Moderate	95/100
33	92027	Escondido	CA	34%	Moderate	90/100
34	92101	San Diego	CA	34%	Moderate	35/100
35	92026	Escondido	CA	32%	Moderate	90/100
36	92112	San Diego	CA	32%	Moderate	60/100
37	92127	San Diego	CA	32%	Moderate	65/100
38	92132	San Diego	CA	32%	Moderate	60/100
39	92133	San Diego	CA	32%	Moderate	60/100
40	92134	San Diego	CA	32%	Moderate	60/100
41	92135	San Diego	CA	32%	Moderate	60/100
42	92137	San Diego	CA	32%	Moderate	60/100
43	92138	San Diego	CA	32%	Moderate	60/100
44	92140	San Diego	CA	32%	Moderate	60/100
45	92142	San Diego	CA	32%	Moderate	60/100
46	92145	San Diego	CA	32%	Moderate	60/100
47	92147	San Diego	CA	32%	Moderate	60/100
48	92149	San Diego	CA	32%	Moderate	60/100
49	92150	San Diego	CA	32%	Moderate	60/100
50	92152	San Diego	CA	32%	Moderate	60/100
51	92153	San Diego	CA	32%	Moderate	60/100
52	92155	San Diego	CA	32%	Moderate	60/100
53	92158	San Diego	CA	32%	Moderate	60/100
54	92159	San Diego	CA	32%	Moderate	60/100
55	92160	San Diego	CA	32%	Moderate	60/100
56	92161	San Diego	CA	32%	Moderate	60/100
57	92162	San Diego	CA	32%	Moderate	60/100
58	92163	San Diego	CA	32%	Moderate	60/100
59	92164	San Diego	CA	32%	Moderate	60/100
60	92165	San Diego	CA	32%	Moderate	60/100
61	92166	San Diego	CA	32%	Moderate	60/100
62	92167	San Diego	CA	32%	Moderate	60/100
63	92168	San Diego	CA	32%	Moderate	60/100
64	92169	San Diego	CA	32%	Moderate	60/100
65	92170	San Diego	CA	32%	Moderate	60/100
66	92171	San Diego	CA	32%	Moderate	60/100
67	92172	San Diego	CA	32%	Moderate	60/100
68	92174	San Diego	CA	32%	Moderate	60/100
69	92175	San Diego	CA	32%	Moderate	60/100
70	92176	San Diego	CA	32%	Moderate	60/100
71	92177	San Diego	CA	32%	Moderate	60/100
72	92179	San Diego	CA	32%	Moderate	60/100
73	92182	San Diego	CA	32%	Moderate	60/100
74	92184	San Diego	CA	32%	Moderate	60/100
75	92186	San Diego	CA	32%	Moderate	60/100
76	92187	San Diego	CA	32%	Moderate	60/100
77	92190	San Diego	CA	32%	Moderate	60/100
78	92191	San Diego	CA	32%	Moderate	60/100
79	92192	San Diego	CA	32%	Moderate	60/100
80	92193	San Diego	CA	32%	Moderate	60/100
81	92194	San Diego	CA	32%	Moderate	60/100
82	92195	San Diego	CA	32%	Moderate	60/100
83	92196	San Diego	CA	32%	Moderate	60/100
84	92197	San Diego	CA	32%	Moderate	60/100
85	92198	San Diego	CA	32%	Moderate	60/100
86	92199	San Diego	CA	32%	Moderate	60/100
87	92008	Carlsbad	CA	31%	Moderate	90/100
88	92029	Escondido	CA	30%	Moderate	90/100
89	92130	San Diego	CA	30%	Moderate	65/100
90	92056	Oceanside	CA	28%	Moderate	82/100
91	92030	Escondido	CA	25%	Moderate	99/100
92	92033	Escondido	CA	25%	Moderate	95/100
93	92046	Escondido	CA	25%	Moderate	99/100
94	92057	Oceanside	CA	25%	Moderate	82/100
95	92058	Oceanside	CA	24%	Moderate	82/100
96	92009	Carlsbad	CA	22%	Moderate	90/100
97	92010	Carlsbad	CA	22%	Moderate	95/100
98	92011	Carlsbad	CA	20%	Low	95/100
99	91913	Chula Vista	CA	17%	Low	99/100
100	91914	Chula Vista	CA	14%	Low	99/100

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.