PFAS Tracker

Tracking "forever chemicals" (PFAS) in America's drinking water from EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR5).

10,252

Systems Tested

6,126

Systems with PFAS

60%

Detection Rate

PFAS Contaminants Tested

30 PFAS compounds monitored under UCMR5.

Contaminant	Samples	Detections	Detection Rate	Systems Detected	Max Level
lithium	64,811	18,344	28.3%	3,753	960.000 µg/L
PFPeA	64,181	6,832	10.64%	2,032	0.358 µg/L
PFHxA	64,195	5,899	9.19%	1,778	0.260 µg/L
PFBS	64,196	5,524	8.6%	1,674	0.290 µg/L
PFBA	64,187	5,256	8.19%	1,893	1.700 µg/L
PFOS	64,200	4,378	6.82%	1,336	0.490 µg/L
PFOA	64,200	4,270	6.65%	1,288	0.235 µg/L
PFHxS	64,190	3,170	4.94%	1,021	0.250 µg/L
PFHpA	64,204	1,493	2.33%	553	0.073 µg/L
6:2 FTS	64,191	252	0.39%	182	0.672 µg/L
PFNA	64,203	173	0.27%	83	0.100 µg/L
HFPO-DA	64,206	117	0.18%	47	0.140 µg/L
PFPeS	64,205	99	0.15%	50	0.036 µg/L
PFDA	64,204	29	0.05%	15	0.012 µg/L
8:2 FTS	64,196	12	0.02%	10	0.042 µg/L
PFUnA	64,202	12	0.02%	6	0.022 µg/L
PFHpS	64,205	6	0.01%	5	0.005 µg/L
NFDHA	64,199	5	0.01%	4	0.039 µg/L
ADONA	64,205	4	0.01%	3	0.008 µg/L
PFDoA	64,195	4	0.01%	4	0.005 µg/L
PFMPA	64,205	3	0%	2	0.010 µg/L
4:2 FTS	64,205	2	0%	2	0.008 µg/L
NMeFOSAA	64,585	2	0%	1	0.015 µg/L
PFMBA	64,205	2	0%	1	0.003 µg/L
9Cl-PF3ONS	64,178	1	0%	1	0.003 µg/L
NEtFOSAA	64,584	1	0%	1	0.007 µg/L
11Cl-PF3OUdS	64,206	0	0%	0	—
PFEESA	64,205	0	0%	0	—
PFTA	64,585	0	0%	0	—
PFTrDA	64,584	0	0%	0	—

State	Tested	Detected	Detection Rate
Texas	1,147	1,068	93.1%
California	694	447	64.4%
Pennsylvania	389	224	57.6%
Louisiana	265	218	82.3%
Florida	402	218	54.2%
New Jersey	264	208	78.8%
Ohio	346	204	59%
Illinois	487	199	40.9%
North Carolina	287	174	60.6%
Missouri	230	162	70.4%
Mississippi	238	160	67.2%
Alabama	306	157	51.3%
Minnesota	196	149	76%
Massachusetts	263	148	56.3%
Arizona	152	145	95.4%
New York	332	129	38.9%
Iowa	152	127	83.6%
South Carolina	164	107	65.2%
Kentucky	231	107	46.3%
Georgia	254	102	40.2%
Oklahoma	166	101	60.8%
Washington	247	98	39.7%
Colorado	163	98	60.1%
Tennessee	277	93	33.6%
Indiana	229	93	40.6%
Utah	129	91	70.5%
Kansas	103	89	86.4%
Michigan	318	87	27.4%
Wisconsin	202	78	38.6%
Virginia	171	70	40.9%
New Mexico	72	70	97.2%
Arkansas	172	57	33.1%
Nebraska	53	52	98.1%
Nevada	57	50	87.7%
Maryland	83	50	60.2%
West Virginia	102	46	45.1%
South Dakota	49	42	85.7%
Puerto Rico	99	40	40.4%
Idaho	60	40	66.7%
Connecticut	63	40	63.5%
North Dakota	38	34	89.5%
Oregon	125	30	24%
09	41	30	73.2%
Montana	45	28	62.2%
Delaware	35	25	71.4%
New Hampshire	51	23	45.1%
Wyoming	33	18	54.5%
Rhode Island	29	15	51.7%
06	18	15	83.3%
Maine	41	14	34.1%
Navajo Nation	13	13	100%
Alaska	30	10	33.3%
08	13	10	76.9%
05	13	5	38.5%
Vermont	37	3	8.1%
Guam	5	3	60%
District of Columbia	3	3	100%
Hawaii	45	2	4.4%
10	10	2	20%
US Virgin Islands	3	1	33.3%
Northern Mariana Islands	2	1	50%
American Samoa	1	1	100%
07	1	1	100%
01	2	1	50%
04	2	0	0%
02	2	0	0%