PFAS Detections in Washington ZIP Codes — 2026

Out of 152 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	152
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	93/100
2	99001	Airway Heights	WA	0.1 ppt	40/100
3	98371	Puyallup	WA	0.1 ppt	82/100
4	98372	Puyallup	WA	0.1 ppt	87/100
5	98373	Puyallup	WA	0.1 ppt	92/100
6	98374	Puyallup	WA	0.1 ppt	87/100
7	98837	Moses Lake	WA	0.1 ppt	72/100
8	98674	Woodland	WA	0.0 ppt	82/100
9	98233	Burlington	WA	0.0 ppt	77/100
10	98273	Mount Vernon	WA	0.0 ppt	79/100
11	98284	Sedro Woolley	WA	0.0 ppt	80/100
12	98506	Olympia	WA	0.0 ppt	94/100
13	98513	Olympia	WA	0.0 ppt	84/100
14	98516	Olympia	WA	0.0 ppt	94/100
15	98660	Vancouver	WA	0.0 ppt	69/100
16	98661	Vancouver	WA	0.0 ppt	69/100
17	98662	Vancouver	WA	0.0 ppt	69/100
18	98664	Vancouver	WA	0.0 ppt	69/100
19	98665	Vancouver	WA	0.0 ppt	69/100
20	98668	Vancouver	WA	0.0 ppt	65/100
21	98239	Coupeville	WA	0.0 ppt	94/100
22	99011	Fairchild Air Force Base	WA	0.0 ppt	40/100
23	99352	Richland	WA	0.0 ppt	78/100
24	99354	Richland	WA	0.0 ppt	78/100
25	98029	Issaquah	WA	0.0 ppt	89/100
26	98053	Redmond	WA	0.0 ppt	93/100
27	98074	Sammamish	WA	0.0 ppt	88/100
28	98075	Sammamish	WA	0.0 ppt	88/100
29	99320	Benton City	WA	0.0 ppt	78/100
30	98010	Black Diamond	WA	0.0 ppt	95/100
31	98038	Maple Valley	WA	0.0 ppt	78/100
32	98042	Kent	WA	0.0 ppt	95/100
33	98051	Ravensdale	WA	0.0 ppt	98/100
34	98092	Auburn	WA	0.0 ppt	84/100
35	98387	Spanaway	WA	0.0 ppt	94/100
36	98444	Tacoma	WA	0.0 ppt	88/100
37	98445	Tacoma	WA	0.0 ppt	88/100
38	98448	Tacoma	WA	0.0 ppt	97/100
39	98001	Auburn	WA	0.0 ppt	84/100
40	98003	Federal Way	WA	0.0 ppt	91/100
41	98023	Federal Way	WA	0.0 ppt	86/100
42	98063	Federal Way	WA	0.0 ppt	95/100
43	98058	Renton	WA	0.0 ppt	84/100
44	98607	Camas	WA	0.0 ppt	63/100
45	99216	Spokane	WA	0.0 ppt	66/100
46	99217	Spokane	WA	0.0 ppt	70/100
47	99336	Kennewick	WA	0.0 ppt	58/100
48	99337	Kennewick	WA	0.0 ppt	58/100
49	99338	Kennewick	WA	0.0 ppt	58/100
50	98433	Tacoma	WA	0.0 ppt	97/100
51	98012	Bothell	WA	0.0 ppt	84/100
52	98072	Woodinville	WA	0.0 ppt	89/100
53	98272	Monroe	WA	0.0 ppt	69/100
54	98296	Snohomish	WA	0.0 ppt	82/100
55	98338	Graham	WA	0.0 ppt	95/100
56	98375	Puyallup	WA	0.0 ppt	92/100
57	98601	Amboy	WA	0.0 ppt	40/100
58	98604	Battle Ground	WA	0.0 ppt	64/100
59	98606	Brush Prairie	WA	0.0 ppt	53/100
60	98629	La Center	WA	0.0 ppt	53/100
61	98642	Ridgefield	WA	0.0 ppt	70/100
62	98663	Vancouver	WA	0.0 ppt	69/100
63	98675	Yacolt	WA	0.0 ppt	67/100
64	98682	Vancouver	WA	0.0 ppt	69/100
65	98683	Vancouver	WA	0.0 ppt	69/100
66	98684	Vancouver	WA	0.0 ppt	69/100
67	98685	Vancouver	WA	0.0 ppt	69/100
68	98686	Vancouver	WA	0.0 ppt	69/100
69	98446	Tacoma	WA	0.0 ppt	88/100
70	98496	Lakewood	WA	0.0 ppt	99/100
71	98498	Lakewood	WA	0.0 ppt	95/100
72	98499	Lakewood	WA	0.0 ppt	90/100
73	98366	Port Orchard	WA	0.0 ppt	89/100
74	98367	Port Orchard	WA	0.0 ppt	89/100
75	98671	Washougal	WA	0.0 ppt	65/100
76	99006	Deer Park	WA	0.0 ppt	66/100
77	98501	Olympia	WA	0.0 ppt	89/100
78	98512	Olympia	WA	0.0 ppt	89/100
79	98354	Milton	WA	0.0 ppt	89/100
80	98548	Hoodsport	WA	0.0 ppt	95/100
81	99004	Cheney	WA	0.0 ppt	61/100
82	99021	Mead	WA	0.0 ppt	62/100
83	99022	Medical Lake	WA	0.0 ppt	70/100
84	99026	Nine Mile Falls	WA	0.0 ppt	53/100
85	99201	Spokane	WA	0.0 ppt	70/100
86	99202	Spokane	WA	0.0 ppt	70/100
87	99203	Spokane	WA	0.0 ppt	70/100
88	99204	Spokane	WA	0.0 ppt	70/100
89	99205	Spokane	WA	0.0 ppt	66/100
90	99207	Spokane	WA	0.0 ppt	70/100
91	99208	Spokane	WA	0.0 ppt	70/100
92	99212	Spokane	WA	0.0 ppt	70/100
93	99218	Spokane	WA	0.0 ppt	70/100
94	99223	Spokane	WA	0.0 ppt	70/100
95	99224	Spokane	WA	0.0 ppt	70/100
96	99258	Spokane	WA	0.0 ppt	66/100
97	99260	Spokane	WA	0.0 ppt	66/100
98	98382	Sequim	WA	0.0 ppt	88/100
99	98502	Olympia	WA	0.0 ppt	89/100
100	98507	Olympia	WA	0.0 ppt	94/100

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: 2026-06-04.

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.