Worst Infrastructure: Missouri — 2026 Rankings

Out of 1,030 ZIP codes with infrastructure data in Missouri, 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	1,030
Highest risk	NaN%
Median risk	NaN%
Average risk	NaN%
State	Missouri

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	63005	Chesterfield	MO	NaN%	Unknown	82/100
2	63010	Arnold	MO	NaN%	Unknown	83/100
3	63011	Ballwin	MO	NaN%	Unknown	83/100
4	63012	Barnhart	MO	NaN%	Unknown	78/100
5	63013	Beaufort	MO	NaN%	Unknown	—
6	63014	Berger	MO	NaN%	Unknown	—
7	63015	Catawissa	MO	NaN%	Unknown	—
8	63016	Cedar Hill	MO	NaN%	Unknown	80/100
9	63017	Chesterfield	MO	NaN%	Unknown	83/100
10	63019	Crystal City	MO	NaN%	Unknown	78/100
11	63020	De Soto	MO	NaN%	Unknown	78/100
12	63021	Ballwin	MO	NaN%	Unknown	81/100
13	63023	Dittmer	MO	NaN%	Unknown	—
14	63025	Eureka	MO	NaN%	Unknown	81/100
15	63026	Fenton	MO	NaN%	Unknown	81/100
16	63028	Festus	MO	NaN%	Unknown	73/100
17	63030	Fletcher	MO	NaN%	Unknown	—
18	63031	Florissant	MO	NaN%	Unknown	83/100
19	63033	Florissant	MO	NaN%	Unknown	83/100
20	63034	Florissant	MO	NaN%	Unknown	83/100
21	63036	French Village	MO	NaN%	Unknown	—
22	63037	Gerald	MO	NaN%	Unknown	—
23	63038	Glencoe	MO	NaN%	Unknown	82/100
24	63039	Gray Summit	MO	NaN%	Unknown	—
25	63040	Grover	MO	NaN%	Unknown	83/100
26	63041	Grubville	MO	NaN%	Unknown	—
27	63042	Hazelwood	MO	NaN%	Unknown	83/100
28	63043	Maryland Heights	MO	NaN%	Unknown	83/100
29	63044	Bridgeton	MO	NaN%	Unknown	83/100
30	63047	Hematite	MO	NaN%	Unknown	82/100
31	63048	Herculaneum	MO	NaN%	Unknown	77/100
32	63049	High Ridge	MO	NaN%	Unknown	76/100
33	63050	Hillsboro	MO	NaN%	Unknown	78/100
34	63051	House Springs	MO	NaN%	Unknown	80/100
35	63052	Imperial	MO	NaN%	Unknown	81/100
36	63053	Kimmswick	MO	NaN%	Unknown	—
37	63055	Labadie	MO	NaN%	Unknown	—
38	63056	Leslie	MO	NaN%	Unknown	—
39	63060	Lonedell	MO	NaN%	Unknown	—
40	63061	Luebbering	MO	NaN%	Unknown	—
41	63068	New Haven	MO	NaN%	Unknown	—
42	63069	Pacific	MO	NaN%	Unknown	—
43	63070	Pevely	MO	NaN%	Unknown	80/100
44	63071	Richwoods	MO	NaN%	Unknown	—
45	63072	Robertsville	MO	NaN%	Unknown	—
46	63073	Saint Albans	MO	NaN%	Unknown	—
47	63074	Saint Ann	MO	NaN%	Unknown	83/100
48	63077	Saint Clair	MO	NaN%	Unknown	—
49	63079	Stanton	MO	NaN%	Unknown	—
50	63080	Sullivan	MO	NaN%	Unknown	—
51	63084	Union	MO	NaN%	Unknown	—
52	63087	Valles Mines	MO	NaN%	Unknown	—
53	63088	Valley Park	MO	NaN%	Unknown	83/100
54	63089	Villa Ridge	MO	NaN%	Unknown	—
55	63090	Washington	MO	NaN%	Unknown	—
56	63091	Rosebud	MO	NaN%	Unknown	—
57	63101	Saint Louis	MO	NaN%	Unknown	70/100
58	63102	Saint Louis	MO	NaN%	Unknown	70/100
59	63103	Saint Louis	MO	NaN%	Unknown	79/100
60	63104	Saint Louis	MO	NaN%	Unknown	70/100
61	63105	Saint Louis	MO	NaN%	Unknown	79/100
62	63106	Saint Louis	MO	NaN%	Unknown	70/100
63	63107	Saint Louis	MO	NaN%	Unknown	70/100
64	63108	Saint Louis	MO	NaN%	Unknown	70/100
65	63109	Saint Louis	MO	NaN%	Unknown	70/100
66	63110	Saint Louis	MO	NaN%	Unknown	70/100
67	63111	Saint Louis	MO	NaN%	Unknown	70/100
68	63112	Saint Louis	MO	NaN%	Unknown	70/100
69	63113	Saint Louis	MO	NaN%	Unknown	70/100
70	63114	Saint Louis	MO	NaN%	Unknown	83/100
71	63115	Saint Louis	MO	NaN%	Unknown	70/100
72	63116	Saint Louis	MO	NaN%	Unknown	70/100
73	63117	Saint Louis	MO	NaN%	Unknown	79/100
74	63118	Saint Louis	MO	NaN%	Unknown	70/100
75	63119	Saint Louis	MO	NaN%	Unknown	79/100
76	63120	Saint Louis	MO	NaN%	Unknown	79/100
77	63121	Saint Louis	MO	NaN%	Unknown	79/100
78	63122	Saint Louis	MO	NaN%	Unknown	83/100
79	63123	Saint Louis	MO	NaN%	Unknown	79/100
80	63124	Saint Louis	MO	NaN%	Unknown	83/100
81	63125	Saint Louis	MO	NaN%	Unknown	79/100
82	63126	Saint Louis	MO	NaN%	Unknown	83/100
83	63127	Saint Louis	MO	NaN%	Unknown	83/100
84	63128	Saint Louis	MO	NaN%	Unknown	83/100
85	63129	Saint Louis	MO	NaN%	Unknown	83/100
86	63130	Saint Louis	MO	NaN%	Unknown	79/100
87	63131	Saint Louis	MO	NaN%	Unknown	83/100
88	63132	Saint Louis	MO	NaN%	Unknown	83/100
89	63133	Saint Louis	MO	NaN%	Unknown	79/100
90	63134	Saint Louis	MO	NaN%	Unknown	83/100
91	63135	Saint Louis	MO	NaN%	Unknown	83/100
92	63136	Saint Louis	MO	NaN%	Unknown	79/100
93	63137	Saint Louis	MO	NaN%	Unknown	79/100
94	63138	Saint Louis	MO	NaN%	Unknown	79/100
95	63139	Saint Louis	MO	NaN%	Unknown	79/100
96	63140	Saint Louis	MO	NaN%	Unknown	83/100
97	63141	Saint Louis	MO	NaN%	Unknown	83/100
98	63143	Saint Louis	MO	NaN%	Unknown	70/100
99	63144	Saint Louis	MO	NaN%	Unknown	83/100
100	63146	Saint Louis	MO	NaN%	Unknown	83/100

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.