Worst Infrastructure: Oklahoma — 2026 Rankings

Out of 756 ZIP codes with infrastructure data in Oklahoma, 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	756
Highest risk	68%
Median risk	41%
Average risk	42%
State	Oklahoma

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	74637	Fairfax	OK	68%	Very High	70/100
2	73565	Ryan	OK	66%	Very High	66/100
3	74035	Hominy	OK	66%	Very High	62/100
4	74058	Pawnee	OK	64%	Very High	70/100
5	73737	Fairview	OK	63%	Very High	65/100
6	74003	Bartlesville	OK	63%	Very High	60/100
7	74020	Cleveland	OK	63%	Very High	70/100
8	73530	Davidson	OK	62%	Very High	75/100
9	73559	Mountain Park	OK	62%	Very High	70/100
10	73568	Temple	OK	62%	Very High	66/100
11	74002	Barnsdall	OK	62%	Very High	68/100
12	73077	Perry	OK	61%	Very High	68/100
13	74631	Blackwell	OK	61%	Very High	55/100
14	73550	Hollis	OK	60%	High	65/100
15	73560	Olustee	OK	60%	High	63/100
16	73570	Tipton	OK	60%	High	70/100
17	73573	Waurika	OK	60%	High	62/100
18	74401	Muskogee	OK	60%	High	69/100
19	74636	Deer Creek	OK	60%	High	66/100
20	74652	Shidler	OK	60%	High	55/100
21	73005	Anadarko	OK	59%	High	62/100
22	73033	Eakly	OK	59%	High	55/100
23	73040	Geary	OK	59%	High	76/100
24	73743	Hillsdale	OK	59%	High	94/100
25	74447	Okmulgee	OK	59%	High	65/100
26	74521	Albion	OK	59%	High	66/100
27	74536	Clayton	OK	59%	High	37/100
28	74547	Hartshorne	OK	59%	High	61/100
29	74848	Holdenville	OK	59%	High	70/100
30	73107	Oklahoma City	OK	58%	High	91/100
31	73521	Altus	OK	58%	High	70/100
32	73546	Grandfield	OK	58%	High	55/100
33	73566	Snyder	OK	58%	High	64/100
34	74022	Copan	OK	58%	High	68/100
35	74403	Muskogee	OK	58%	High	59/100
36	74647	Newkirk	OK	58%	High	83/100
37	74873	Tecumseh	OK	58%	High	40/100
38	73057	Maysville	OK	57%	High	62/100
39	73103	Oklahoma City	OK	57%	High	91/100
40	73118	Oklahoma City	OK	57%	High	81/100
41	74085	Yale	OK	57%	High	66/100
42	74103	Tulsa	OK	57%	High	91/100
43	74630	Billings	OK	57%	High	73/100
44	74837	Cromwell	OK	57%	High	66/100
45	74884	Wewoka	OK	57%	High	70/100
46	73106	Oklahoma City	OK	56%	High	86/100
47	73701	Enid	OK	56%	High	83/100
48	73716	Aline	OK	56%	High	63/100
49	73758	Manchester	OK	56%	High	94/100
50	74029	Dewey	OK	56%	High	65/100
51	74460	Schulter	OK	56%	High	55/100
52	74538	Coalgate	OK	56%	High	65/100
53	74546	Haileyville	OK	56%	High	89/100
54	74553	Kiowa	OK	56%	High	70/100
55	74571	Talihina	OK	56%	High	70/100
56	74632	Braman	OK	56%	High	80/100
57	74801	Shawnee	OK	56%	High	60/100
58	73014	Calumet	OK	55%	High	69/100
59	73018	Chickasha	OK	55%	High	60/100
60	73036	El Reno	OK	55%	High	69/100
61	73532	Duke	OK	55%	High	66/100
62	73542	Frederick	OK	55%	High	66/100
63	73551	Hollister	OK	55%	High	98/100
64	73632	Cordell	OK	55%	High	78/100
65	73641	Dill City	OK	55%	High	73/100
66	73726	Carmen	OK	55%	High	83/100
67	73753	Kremlin	OK	55%	High	70/100
68	73760	Meno	OK	55%	High	66/100
69	73762	Okarche	OK	55%	High	64/100
70	74001	Avant	OK	55%	High	70/100
71	74056	Pawhuska	OK	55%	High	84/100
72	74369	Welch	OK	55%	High	70/100
73	74560	Pittsburg	OK	55%	High	46/100
74	73024	Corn	OK	54%	High	65/100
75	73043	Greenfield	OK	54%	High	89/100
76	73109	Oklahoma City	OK	54%	High	81/100
77	73111	Oklahoma City	OK	54%	High	86/100
78	73556	Martha	OK	54%	High	70/100
79	73628	Cheyenne	OK	54%	High	62/100
80	73655	Lone Wolf	OK	54%	High	86/100
81	73673	Willow	OK	54%	High	83/100
82	73729	Cleo Springs	OK	54%	High	66/100
83	73731	Dacoma	OK	54%	High	91/100
84	73766	Pond Creek	OK	54%	High	89/100
85	73857	Sharon	OK	54%	High	61/100
86	74112	Tulsa	OK	54%	High	76/100
87	74745	Idabel	OK	54%	High	65/100
88	74859	Okemah	OK	54%	High	70/100
89	74883	Wetumka	OK	54%	High	51/100
90	73053	Lookeba	OK	53%	High	70/100
91	73075	Pauls Valley	OK	53%	High	65/100
92	73119	Oklahoma City	OK	53%	High	76/100
93	73528	Chattanooga	OK	53%	High	66/100
94	73531	Devol	OK	53%	High	70/100
95	73749	Jet	OK	53%	High	91/100
96	73763	Okeene	OK	53%	High	94/100
97	74048	Nowata	OK	53%	High	65/100
98	74104	Tulsa	OK	53%	High	86/100
99	74110	Tulsa	OK	53%	High	86/100
100	74114	Tulsa	OK	53%	High	81/100

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: 2026-06-03.

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.