National ranking

PFAS in drinking water, state by state

EPA's UCMR 5 programme tested 10,297 public water systems for 29 PFAS compounds between 2023 and 2025. We processed every result. Detections turned up in 3,539 systems, serving roughly 152 million people. Here is how every state compares, and what was found in each.

Rank	State	Systems tested	With a detection	Rate
1	New Jersey	241	164	68.0%
2	Connecticut	63	42	66.7%
3	Rhode Island	25	14	56.0%
4	South Carolina	164	91	55.5%
5	Massachusetts	262	143	54.6%
6	Texas	1,121	601	53.6%
7	Delaware	22	11	50.0%
8	North Carolina	282	139	49.3%
9	Florida	388	185	47.7%
10	Minnesota	197	87	44.2%
11	Pennsylvania	360	159	44.2%
12	Ohio	316	130	41.1%
13	Alabama	306	116	37.9%
14	Kentucky	231	87	37.7%
15	West Virginia	84	31	36.9%
16	Oklahoma	160	58	36.2%
17	Puerto Rico	84	30	35.7%
18	New Hampshire	48	17	35.4%
19	California	691	234	33.9%
20	Arizona	162	54	33.3%
21	Maryland	73	24	32.9%
22	Virginia	146	48	32.9%
23	Alaska	28	9	32.1%
24	Kansas	101	32	31.7%
25	Tennessee	272	85	31.2%
26	Georgia	250	77	30.8%
27	Missouri	241	74	30.7%
28	New York	316	92	29.1%
29	Washington	244	66	27.0%
30	Illinois	469	120	25.6%
31	Indiana	219	53	24.2%
32	Maine	38	9	23.7%
33	Colorado	158	36	22.8%
34	Wisconsin	149	33	22.1%
35	Iowa	151	32	21.2%
36	Nevada	37	7	18.9%
37	Louisiana	257	46	17.9%
38	North Dakota	41	7	17.1%
39	Michigan	312	44	14.1%
40	Oregon	123	17	13.8%
41	Nebraska	51	7	13.7%
42	Utah	128	17	13.3%
43	New Mexico	77	10	13.0%
44	Idaho	62	8	12.9%
45	Montana	40	5	12.5%
46	Wyoming	32	4	12.5%
47	South Dakota	55	6	10.9%
48	Vermont	35	3	8.6%
49	Arkansas	171	10	5.8%
50	Hawaii	44	2	4.5%
51	Mississippi	224	9	4.0%

SourceEPA UCMR 5 occurrence data, 2023–2025

NoteStates with fewer than 5 systems tested are excluded

State averages don't describe your tap

Look up your own system. Within a state, results vary enormously between utilities.

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