PFAS Contamination

PFAS in Oklahoma Drinking Water

Ranked by number of PFAS compounds detected · Data from EPA SDWIS & UCMR

125

Cities Tested

Exceeds Limit

10%

% Exceeds Limit

1.4 compounds

State Avg

▼ 11% vs national

vs National

351

Health Violations

Analysis

PFAS in Oklahoma: what the data shows

Oklahoma has 125 cities with PFAS monitoring data from the EPA's UCMR 5 program. PFAS ("forever chemicals") were detected in 85 of those cities (68%), with some cities exceeding the EPA's 2024 maximum contaminant levels of 4 ppt. The state average is better than the national average. 12 cities exceed the EPA MCL for at least one PFAS compound. PFAS are linked to cancer, immune system disruption, and developmental issues. The 2024 EPA rule requires water systems exceeding the MCL to notify customers and reduce levels by 2029. PFAS data comes from the EPA's Unregulated Contaminant Monitoring Rule 5 (UCMR 5), which required large water systems to test for 29 PFAS compounds between 2023–2025. Not all systems have completed testing — cities without data may still have PFAS present.

Comparison

Cities exceeding EPA MCL (4 ppt each)

Oklahoma

10%

12 of 125 cities

← ▼ 11% below national rate (better)

National avg

21%

1662 of 7853 cities

City Map

PFAS data across Oklahoma

Each dot is a city, colored by overall water quality grade. PFAS-tested cities are shown; those exceeding the 4 ppt EPA MCL appear in red. Size reflects population served.

Worst Offenders

Top 10 cities by pfas level in Oklahoma

Highest PFAS levels (compounds)

All Cities

All Oklahoma cities ranked by pfas level

#	City	Level	Exceeds?	Violations	Grade
1	Edmond	7 compounds	Yes	86	F
2	Stillwater	7 compounds	Yes	72	F
3	Broken Arrow	6 compounds	Yes	113	F
4	Guthrie	6 compounds	Yes	45	F
5	Coweta	6 compounds	Yes	180	D
6	Ardmore	5 compounds	No	188	F
7	Ponca City	5 compounds	Yes	23	F
8	Duncan	5 compounds	No	150	D+
9	Bethany	5 compounds	Yes	14	B+
10	Newkirk	5 compounds	Yes	39	F
11	Del City	4 compounds	No	12	F
12	Piedmont	4 compounds	No	32	C-
13	Nowata	4 compounds	Yes	254	F
14	Tuttle	4 compounds	No	46	D
15	Oklahoma City	3 compounds	No	56	F
16	Norman	3 compounds	No	52	F
17	Altus	3 compounds	No	162	D
18	Tahlequah	3 compounds	No	56	F
19	Eufaula	3 compounds	No	374	F
20	Hulbert	3 compounds	No	117	D
21	Earlsboro	3 compounds	Yes	4	C+
22	Claremore	2 compounds	No	153	F
23	Bartlesville	2 compounds	No	217	F
24	Shawnee	2 compounds	No	124	D
25	Durant	2 compounds	No	104	D
26	Pryor	2 compounds	Yes	17	D
27	Hastings	2 compounds	No	63	D+
28	Newcastle	2 compounds	No	5	A-
29	Tecumseh	2 compounds	No	142	F
30	Noble	2 compounds	No	160	D
31	Frederick	2 compounds	No	104	D+
32	Hobart	2 compounds	No	9	A
33	Midwest City	1 compounds	No	11	B+
34	Moore	1 compounds	No	53	F
35	Enid	1 compounds	No	33	F
36	Mcalester	1 compounds	No	670	F
37	Yukon	1 compounds	No	18	D
38	El Reno	1 compounds	No	49	D
39	Mustang	1 compounds	No	9	C+
40	Chickasha	1 compounds	No	79	F
41	Woodward	1 compounds	No	55	D
42	Skiatook	1 compounds	No	72	B-
43	Miami	1 compounds	No	11	D
44	Elk City	1 compounds	No	5	D
45	Vinita	1 compounds	No	114	D
46	Guymon	1 compounds	No	10	A-
47	Checotah	1 compounds	No	365	D
48	Marlow	1 compounds	No	11	B
49	Weatherford	1 compounds	No	71	D
50	Mounds	1 compounds	No	219	D+
51	Henryetta	1 compounds	No	116	F
52	Pauls Valley	1 compounds	No	103	C-
53	Clinton	1 compounds	No	31	D+
54	Blackwell	1 compounds	No	65	D+
55	Chouteau	1 compounds	Yes	9	B-
56	Oologah	1 compounds	No	32	B-
57	Perry	1 compounds	No	129	D
58	Okemah	1 compounds	No	71	D
59	Seminole	1 compounds	No	4	A
60	Purcell	1 compounds	No	1	A-
61	Mannford	1 compounds	No	93	B-
62	Kellyville	1 compounds	No	32	B-
63	Alva	1 compounds	No	6	B-
64	Carnegie	1 compounds	No	9	B
65	Holdenville	1 compounds	No	148	D+
66	Kingfisher	1 compounds	No	38	D
67	Porum	1 compounds	No	45	B-
68	Lone Grove	1 compounds	No	4	B+
69	Pocola	1 compounds	No	43	D+
70	Harrah	1 compounds	No	61	D
71	Amber	1 compounds	No	30	D
72	Sayre	1 compounds	No	2	A
73	Wewoka	1 compounds	No	340	D+
74	Adair	1 compounds	No	35	B+
75	Choctaw	1 compounds	No	3	F
76	Nichols Hills	1 compounds	No	21	D
77	Dewey	1 compounds	No	23	F
78	Spencer	1 compounds	No	5	C
79	Bristow	1 compounds	No	5	D
80	Heavener	1 compounds	No	59	D
81	Fairland	1 compounds	No	11	D
82	Watonga	1 compounds	No	27	C+
83	Wyandotte	1 compounds	No	5	D
84	Byron	1 compounds	No	33	B
85	Hydro	1 compounds	No	11	C-
86	Tulsa	0 compounds	No	6	D
87	Lawton	0 compounds	No	23	F
88	Muskogee	0 compounds	No	246	D
89	Ada	0 compounds	No	6	B-
90	Collinsville	0 compounds	No	24	C+
91	Sand Springs	0 compounds	No	20	B
92	Jenks	0 compounds	No	31	B-
93	Sapulpa	0 compounds	No	85	D
94	Sallisaw	0 compounds	No	29	D+
95	Madill	0 compounds	No	178	F
96	Owasso	0 compounds	No	8	C+
97	Fort Sill	0 compounds	No	4	A
98	Bixby	0 compounds	No	1	B
99	Wagoner	0 compounds	No	141	F
100	Okmulgee	0 compounds	No	262	D
101	Spiro	0 compounds	No	166	D+
102	Glenpool	0 compounds	No	9	A
103	Broken Bow	0 compounds	No	122	F
104	Sulphur	0 compounds	No	2	A-
105	Poteau	0 compounds	No	56	D
106	Cushing	0 compounds	No	1	A-
107	Grove	0 compounds	No	20	D
108	Fort Gibson	0 compounds	No	153	F
109	Antlers	0 compounds	No	229	D+
110	Idabel	0 compounds	No	123	D
111	Anadarko	0 compounds	No	83	D+
112	Hartshorne	0 compounds	No	103	D+
113	Mead	0 compounds	No	106	D+
114	Ketchum	0 compounds	No	5	A
115	Hugo	0 compounds	No	166	D+
116	Wister	0 compounds	No	84	D
117	Haworth	0 compounds	No	67	D
118	Big Cabin	0 compounds	No	39	D+
119	Pawhuska	0 compounds	No	34	D+
120	Afton	0 compounds	No	89	F
121	Ramona	0 compounds	No	42	D
122	Oktaha	0 compounds	No	67	D+
123	Garvin	0 compounds	No	43	D
124	Valliant	0 compounds	No	54	D
125	Okay	0 compounds	No	63	D+

FAQ

Frequently asked questions about pfas in Oklahoma

Does Oklahoma tap water contain PFAS?

PFAS were detected in 85 of 125 Oklahoma cities tested under EPA's UCMR 5 program. 12 cities exceed the 2024 EPA MCL of 4 ppt for individual PFAS compounds.

How can I remove PFAS from my drinking water in Oklahoma?

Reverse osmosis (RO) systems are the most effective at removing PFAS, typically removing 90%+ of compounds. High-quality activated carbon block filters (NSF 58-certified for RO, or NSF 53 for solid carbon) also provide significant reduction. Standard pitcher filters vary widely in PFAS removal.

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