PFAS Results by State

Data current as of May 2026 — recomputed by ZipCheckup from federal data each build.

Of 10,296 water systems with UCMR5 PFAS results, 662 (6.4%) report an exceedance, across 57 states and jurisdictions, as of May 2026.

Among 10,296 water systems with PFAS results, 662 (6.4%) report an exceedance, across 57 states and U.S. jurisdictions, as of May 2026.

By state

We report two independent facts side by side and do not rank states. A larger count reflects the size of a state's inventory and its reporting activity, not a judgment about water safety.

state	systems tested	exceedance	detected	tested clean
AK	32	3	6	23
AL	309	47	71	191
AR	185	0	11	174
AS	1	0	1	0
AZ	154	14	43	97
CA	719	92	144	483
CO	178	3	36	139
CT	104	9	39	56
DC	3	0	3	0
DE	46	6	11	29
FL	407	86	105	216
GA	255	15	62	178
GU	5	1	2	2
HI	45	0	2	43
IA	152	3	29	120
ID	61	2	6	53
IL	487	8	115	364
IN	230	4	51	175
KS	103	2	32	69
KY	231	6	81	144
LA	268	1	46	221
MA	263	18	125	120
MD	83	7	23	53
ME	41	1	9	31
MI	319	3	41	275
MN	196	7	80	109
MO	232	3	68	161
MP	2	1	0	1
MS	239	2	7	230
MT	45	0	5	40
NC	290	48	97	145
ND	38	0	7	31
NE	53	3	4	46
NH	51	1	17	33
NJ	265	59	115	91
NM	73	1	9	63
NN	13	0	2	11
NV	58	2	8	48
NY	333	13	85	235
OH	347	20	121	206
OK	166	6	55	105
OR	127	2	16	109
PA	390	48	126	216
PR	99	9	29	61
RI	29	2	13	14
SC	165	22	68	75
SD	49	1	6	42
TN	277	13	74	190
TX	1,152	25	586	541
UT	129	3	13	113
VA	171	4	50	117
VI	3	0	1	2
VT	38	0	3	35
WA	247	14	52	181
WI	202	11	40	151
WV	103	10	24	69
WY	33	1	2	30

Download the data

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Open data, licensed CC BY 4.0 · DOI: 10.5281/zenodo.19427201

How we compute this

We tabulate EPA UCMR5 PFAS sampling results at the water-system level and group them by state and U.S. jurisdiction. The denominator is systems that HAVE UCMR5 results; systems without sampling results are not represented, and absence from this dataset is not the same as a clean result.

States and jurisdictions are listed alphabetically. The per-state table shows the tested-system, exceedance, detection, and tested-clean counts side by side, framed as a distribution among tested systems rather than a statewide total or a ranking.

Counts recompute each build from the UCMR5 extract. This finding is the geographic cut that complements ZipCheckup's national PFAS testing-gap and detection findings.

Source: EPA UCMR5 PFAS occurrence (water-system level)

Every number here is recomputed from public federal data on each build by open-source code in the ZipCheckup repository; a dated CSV snapshot is published with each finding. No data does not mean safe.

Frequently asked questions

How many water systems report a PFAS exceedance?

Among 10,296 water systems with UCMR5 PFAS sampling results, 662 (6.4%) report an exceedance as of May 2026. Systems without PFAS sampling results are not represented here, and their absence is not evidence of PFAS-free water. according to ZipCheckup's reading of federal data as of May 2026.

Which states have PFAS results reported?

ZipCheckup tabulates PFAS results for water systems across 57 states and U.S. jurisdictions as of May 2026. The per-state table lists tested-system, exceedance, detection, and tested-clean counts side by side — a distribution among tested systems, not a statewide total.