Peor infraestructura: Washington — Clasificaciones 2026

Out of 688 ZIP codes with infrastructure data in Washington, 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	688
Highest risk	70%
Median risk	35%
Average risk	35%
State	Washington

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	98238	Conway	WA	70%	Very High	73/100
2	98364	Port Gamble	WA	70%	Very High	73/100
3	98539	Doty	WA	66%	Very High	66/100
4	99020	Marshall	WA	65%	Very High	54/100
5	98581	Ryderwood	WA	61%	Very High	66/100
6	98628	Klickitat	WA	60%	High	55/100
7	98621	Grays River	WA	58%	High	65/100
8	98644	Seaview	WA	58%	High	73/100
9	98673	Wishram	WA	58%	High	53/100
10	98830	Mansfield	WA	58%	High	63/100
11	98860	Wilson Creek	WA	58%	High	53/100
12	98526	Amanda Park	WA	57%	High	66/100
13	98939	Parker	WA	57%	High	53/100
14	98278	Oak Harbor	WA	56%	High	71/100
15	98544	Galvin	WA	56%	High	65/100
16	98921	Buena	WA	56%	High	53/100
17	99105	Benge	WA	56%	High	53/100
18	98235	Clearlake	WA	55%	High	65/100
19	98438	Mcchord Afb	WA	55%	High	66/100
20	98537	Cosmopolis	WA	55%	High	65/100
21	98547	Grayland	WA	55%	High	65/100
22	98562	Moclips	WA	55%	High	73/100
23	98585	Silver Creek	WA	55%	High	73/100
24	98836	Monitor	WA	55%	High	73/100
25	98845	Palisades	WA	55%	High	63/100
26	99136	Hay	WA	55%	High	53/100
27	98222	Blakely Island	WA	54%	High	73/100
28	98263	Lyman	WA	54%	High	73/100
29	98638	Naselle	WA	54%	High	65/100
30	98345	Keyport	WA	53%	High	66/100
31	98647	Skamokawa	WA	53%	High	65/100
32	98923	Cowiche	WA	53%	High	63/100
33	98619	Glenwood	WA	52%	High	53/100
34	98817	Chelan Falls	WA	52%	High	66/100
35	98952	White Swan	WA	52%	High	53/100
36	98572	Pe Ell	WA	51%	High	90/100
37	98602	Appleton	WA	51%	High	53/100
38	98643	Rosburg	WA	51%	High	65/100
39	98941	Roslyn	WA	51%	High	72/100
40	99135	Hartline	WA	51%	High	53/100
41	99149	Malden	WA	51%	High	53/100
42	99176	Thornton	WA	51%	High	53/100
43	98314	Bremerton	WA	50%	High	99/100
44	98337	Bremerton	WA	50%	High	99/100
45	98520	Aberdeen	WA	50%	High	71/100
46	98538	Curtis	WA	50%	High	65/100
47	98583	Satsop	WA	50%	High	94/100
48	98593	Vader	WA	50%	High	73/100
49	98852	Stehekin	WA	50%	High	45/100
50	98527	Bay Center	WA	49%	High	66/100
51	98587	Taholah	WA	49%	High	66/100
52	98649	Toutle	WA	49%	High	65/100
53	99012	Fairfield	WA	49%	High	53/100
54	99158	Oakesdale	WA	49%	High	63/100
55	99170	Rosalia	WA	49%	High	82/100
56	99371	Washtucna	WA	49%	High	75/100
57	98224	Baring	WA	48%	High	73/100
58	98286	Shaw Island	WA	48%	High	66/100
59	98326	Clallam Bay	WA	48%	High	73/100
60	98336	Glenoma	WA	48%	High	66/100
61	98351	Longbranch	WA	48%	High	73/100
62	98582	Salkum	WA	48%	High	62/100
63	98613	Centerville	WA	48%	High	53/100
64	98670	Wahkiacus	WA	48%	High	53/100
65	98938	Outlook	WA	48%	High	53/100
66	98039	Medina	WA	47%	High	73/100
67	98320	Brinnon	WA	47%	High	65/100
68	98504	Olympia	WA	47%	High	98/100
69	98505	Olympia	WA	47%	High	98/100
70	98507	Olympia	WA	47%	High	94/100
71	98508	Olympia	WA	47%	High	98/100
72	98586	South Bend	WA	47%	High	65/100
73	98599	Olympia	WA	47%	High	98/100
74	98616	Cougar	WA	47%	High	40/100
75	98858	Waterville	WA	47%	High	78/100
76	99130	Garfield	WA	47%	High	63/100
77	99171	Saint John	WA	47%	High	53/100
78	99174	Steptoe	WA	47%	High	53/100
79	98047	Pacific	WA	46%	High	60/100
80	98250	Friday Harbor	WA	46%	High	70/100
81	98339	Port Hadlock	WA	46%	High	73/100
82	98355	Mineral	WA	46%	High	66/100
83	98357	Neah Bay	WA	46%	High	66/100
84	98392	Suquamish	WA	46%	High	73/100
85	98394	Vaughn	WA	46%	High	73/100
86	99018	Latah	WA	46%	High	53/100
87	99032	Sprague	WA	46%	High	77/100
88	99103	Almira	WA	46%	High	83/100
89	99134	Harrington	WA	46%	High	53/100
90	99144	Lamona	WA	46%	High	53/100
91	99154	Mohler	WA	46%	High	53/100
92	99166	Republic	WA	46%	High	61/100
93	99204	Spokane	WA	46%	High	70/100
94	99205	Spokane	WA	46%	High	66/100
95	98201	Everett	WA	45%	High	82/100
96	98243	Deer Harbor	WA	45%	High	66/100
97	98297	Waldron	WA	45%	High	73/100
98	98552	Humptulips	WA	45%	High	73/100
99	98814	Carlton	WA	45%	High	53/100
100	98832	Marlin	WA	45%	High	78/100

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.