PFAS Detections in Washington ZIP Codes — 2026

Out of 145 ZIP codes with data in Washington, these are the highest-ranked areas for pfas status. See also: National ZIP Codes with PFAS Detections in Water | All Washington Rankings

Statistic	Value
ZIP codes ranked	145
Highest value	0.2 ppt
Median value	0.0 ppt
State	Washington

Top 100 Worst ZIP Codes

Rank	ZIP Code	City	State	PFAS Status	Safety Score
1	98503	Lacey	WA	0.2 ppt	82/100
2	99001	Airway Heights	WA	0.1 ppt	50/100
3	98371	Puyallup	WA	0.1 ppt	80/100
4	98372	Puyallup	WA	0.1 ppt	79/100
5	98373	Puyallup	WA	0.1 ppt	81/100
6	98374	Puyallup	WA	0.1 ppt	79/100
7	98837	Moses Lake	WA	0.1 ppt	50/100
8	98674	Woodland	WA	0.0 ppt	98/100
9	98233	Burlington	WA	0.0 ppt	98/100
10	98273	Mount Vernon	WA	0.0 ppt	98/100
11	98284	Sedro Woolley	WA	0.0 ppt	99/100
12	98506	Olympia	WA	0.0 ppt	82/100
13	98513	Olympia	WA	0.0 ppt	97/100
14	98516	Olympia	WA	0.0 ppt	98/100
15	98660	Vancouver	WA	0.0 ppt	50/100
16	98661	Vancouver	WA	0.0 ppt	50/100
17	98662	Vancouver	WA	0.0 ppt	50/100
18	98664	Vancouver	WA	0.0 ppt	50/100
19	98665	Vancouver	WA	0.0 ppt	50/100
20	98239	Coupeville	WA	0.0 ppt	—
21	99011	Fairchild Air Force Base	WA	0.0 ppt	50/100
22	99352	Richland	WA	0.0 ppt	61/100
23	99354	Richland	WA	0.0 ppt	67/100
24	98029	Issaquah	WA	0.0 ppt	83/100
25	98053	Redmond	WA	0.0 ppt	83/100
26	98074	Sammamish	WA	0.0 ppt	83/100
27	98075	Sammamish	WA	0.0 ppt	83/100
28	99320	Benton City	WA	0.0 ppt	59/100
29	98010	Black Diamond	WA	0.0 ppt	83/100
30	98038	Maple Valley	WA	0.0 ppt	82/100
31	98042	Kent	WA	0.0 ppt	82/100
32	98051	Ravensdale	WA	0.0 ppt	83/100
33	98092	Auburn	WA	0.0 ppt	79/100
34	98387	Spanaway	WA	0.0 ppt	77/100
35	98444	Tacoma	WA	0.0 ppt	83/100
36	98445	Tacoma	WA	0.0 ppt	82/100
37	98001	Auburn	WA	0.0 ppt	82/100
38	98003	Federal Way	WA	0.0 ppt	83/100
39	98023	Federal Way	WA	0.0 ppt	83/100
40	98058	Renton	WA	0.0 ppt	99/100
41	98607	Camas	WA	0.0 ppt	47/100
42	99216	Spokane	WA	0.0 ppt	42/100
43	99217	Spokane	WA	0.0 ppt	42/100
44	99336	Kennewick	WA	0.0 ppt	66/100
45	99337	Kennewick	WA	0.0 ppt	64/100
46	99338	Kennewick	WA	0.0 ppt	61/100
47	98433	Tacoma	WA	0.0 ppt	83/100
48	98012	Bothell	WA	0.0 ppt	100/100
49	98072	Woodinville	WA	0.0 ppt	100/100
50	98272	Monroe	WA	0.0 ppt	95/100
51	98296	Snohomish	WA	0.0 ppt	99/100
52	98338	Graham	WA	0.0 ppt	67/100
53	98375	Puyallup	WA	0.0 ppt	80/100
54	98601	Amboy	WA	0.0 ppt	49/100
55	98604	Battle Ground	WA	0.0 ppt	48/100
56	98606	Brush Prairie	WA	0.0 ppt	50/100
57	98629	La Center	WA	0.0 ppt	50/100
58	98642	Ridgefield	WA	0.0 ppt	49/100
59	98663	Vancouver	WA	0.0 ppt	50/100
60	98675	Yacolt	WA	0.0 ppt	49/100
61	98682	Vancouver	WA	0.0 ppt	48/100
62	98683	Vancouver	WA	0.0 ppt	46/100
63	98684	Vancouver	WA	0.0 ppt	48/100
64	98685	Vancouver	WA	0.0 ppt	50/100
65	98686	Vancouver	WA	0.0 ppt	50/100
66	98446	Tacoma	WA	0.0 ppt	82/100
67	98498	Lakewood	WA	0.0 ppt	83/100
68	98499	Lakewood	WA	0.0 ppt	83/100
69	98366	Port Orchard	WA	0.0 ppt	82/100
70	98367	Port Orchard	WA	0.0 ppt	81/100
71	98671	Washougal	WA	0.0 ppt	—
72	99006	Deer Park	WA	0.0 ppt	36/100
73	98501	Olympia	WA	0.0 ppt	80/100
74	98512	Olympia	WA	0.0 ppt	98/100
75	98354	Milton	WA	0.0 ppt	100/100
76	98548	Hoodsport	WA	0.0 ppt	99/100
77	99004	Cheney	WA	0.0 ppt	49/100
78	99021	Mead	WA	0.0 ppt	47/100
79	99022	Medical Lake	WA	0.0 ppt	48/100
80	99026	Nine Mile Falls	WA	0.0 ppt	49/100
81	99201	Spokane	WA	0.0 ppt	50/100
82	99202	Spokane	WA	0.0 ppt	50/100
83	99203	Spokane	WA	0.0 ppt	50/100
84	99204	Spokane	WA	0.0 ppt	50/100
85	99205	Spokane	WA	0.0 ppt	49/100
86	99207	Spokane	WA	0.0 ppt	50/100
87	99208	Spokane	WA	0.0 ppt	47/100
88	99212	Spokane	WA	0.0 ppt	47/100
89	99218	Spokane	WA	0.0 ppt	49/100
90	99223	Spokane	WA	0.0 ppt	46/100
91	99224	Spokane	WA	0.0 ppt	47/100
92	99258	Spokane	WA	0.0 ppt	50/100
93	98382	Sequim	WA	0.0 ppt	83/100
94	98502	Olympia	WA	0.0 ppt	69/100
95	98531	Centralia	WA	0.0 ppt	80/100
96	99009	Elk	WA	0.0 ppt	—
97	98466	Tacoma	WA	0.0 ppt	100/100
98	99003	Chattaroy	WA	0.0 ppt	36/100
99	99005	Colbert	WA	0.0 ppt	48/100
100	98022	Enumclaw	WA	0.0 ppt	100/100

Methodology

PFAS detection data comes from EPA UCMR5 monitoring, state-level testing programs, and Consumer Confidence Reports. ZIP codes are ranked by maximum PFAS concentration detected. The EPA has set MCLs of 4 ppt for PFOA and PFOS individually. PFAS are persistent chemicals that do not break down in the environment.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-08-31.

Frequently Asked Questions

What are PFAS?

PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals used in non-stick coatings, firefighting foam, and food packaging since the 1940s. They are called "forever chemicals" because they do not break down naturally. PFAS are linked to cancer, liver damage, thyroid disease, and immune system suppression.

How can I remove PFAS from my water?

Reverse osmosis (RO) and granular activated carbon (GAC) filters are effective at removing most PFAS from drinking water. NSF/ANSI 53 or 58 certified filters are recommended. Boiling water does NOT remove PFAS.