Arsenic Contamination

Arsenic in Utah Drinking Water

Ranked by arsenic violation count · Data from EPA SDWIS & UCMR

158

Cities Tested

158

Has Violations

100%

% Has Violations

6.5 violations

State Avg

▼ 0% vs national

vs National

150

Health Violations

Analysis

Arsenic in Utah: what the data shows

Utah has 158 cities with arsenic-related violations on record. Arsenic contamination is a federal MCL violation at levels above 10 µg/L (10 ppb). The state has 158 cities with at least one arsenic violation. Arsenic enters drinking water primarily through erosion of natural deposits, particularly in western states with arsenite-bearing geology. Industrial sources include mining runoff, glass manufacturing, and semiconductor production. Groundwater systems are significantly more likely to have arsenic issues than surface water systems. Long-term arsenic exposure above the MCL increases the risk of bladder, lung, and skin cancer, as well as cardiovascular disease and diabetes. Reverse osmosis and specialized arsenic-removal media are the most effective point-of-use treatment options.

Comparison

Cities exceeding 10 µg/L EPA MCL

Utah

100%

158 of 158 cities

← = Exactly at national rate

National avg

100%

5489 of 5489 cities

City Map

Arsenic data across Utah

Each dot is a city with arsenic violation data. Cities with at least one arsenic-related violation are highlighted. Size reflects population served.

Worst Offenders

Top 10 cities by arsenic level in Utah

Highest Arsenic levels (violations)

All Cities

All Utah cities ranked by arsenic level

#	City	Level	Violations?	Violations	Grade
1	Fielding	47 violations	Yes	12	C+
2	Orem	39 violations	Yes	76	F
3	Cedar City	39 violations	Yes	115	F
4	Heber City	28 violations	Yes	34	F
5	Oakley	23 violations	Yes	17	D
6	Midway	23 violations	Yes	23	D+
7	Spanish Fork	19 violations	Yes	26	F
8	Castledale	19 violations	Yes	3	D+
9	Ogden	18 violations	Yes	5	F
10	Eden	18 violations	Yes	27	D
11	Blanding	18 violations	Yes	9	F
12	Delta	17 violations	Yes	20	D
13	St George	17 violations	Yes	20	D
14	Elsinore	16 violations	Yes	31	D+
15	Coalville	14 violations	Yes	21	F
16	Tremonton	14 violations	Yes	27	D
17	New Harmony	14 violations	Yes	26	D+
18	Paradise	14 violations	Yes	19	C-
19	Wellsville	13 violations	Yes	16	D+
20	Bluffdale	13 violations	Yes	7	C
21	Park City	13 violations	Yes	10	F
22	Kanab	13 violations	Yes	14	D+
23	Kaysville	12 violations	Yes	7	C+
24	Mapleton	12 violations	Yes	4	C+
25	Monticello	12 violations	Yes	15	F
26	Hinckley	12 violations	Yes	7	C+
27	Provo	10 violations	Yes	45	D
28	Kearns	10 violations	Yes	6	B
29	Bountiful	10 violations	Yes	9	D
30	East Carbon	10 violations	Yes	6	B
31	Manila	10 violations	Yes	23	C-
32	Loa	10 violations	Yes	11	B+
33	Deweyville	10 violations	Yes	20	C-
34	Tropic	9 violations	Yes	4	D
35	Leeds	9 violations	Yes	18	B
36	Salt Lake City	8 violations	Yes	26	F
37	South Jordan	8 violations	Yes	4	C+
38	Elwood	8 violations	Yes	8	B-
39	Moab	8 violations	Yes	10	D
40	Morgan	8 violations	Yes	28	D
41	Mountain Green	8 violations	Yes	9	B
42	Eureka	8 violations	Yes	5	D+
43	Apple Valley	8 violations	Yes	28	D
44	Stockton	8 violations	Yes	2	A-
45	St George City	7 violations	Yes	4	B+
46	Santaquin	7 violations	Yes	1	D
47	Hildale	7 violations	Yes	2	F
48	Kamas	7 violations	Yes	54	D
49	Torrey	7 violations	Yes	8	B
50	Willard	7 violations	Yes	10	B
51	Monument Valley	7 violations	Yes	6	D+
52	Heber	7 violations	Yes	6	D
53	Central Valley	7 violations	Yes	2	B-
54	Roy	6 violations	Yes	1	B-
55	Payson	6 violations	Yes	19	D
56	Parowan	6 violations	Yes	20	D+
57	Francis	6 violations	Yes	2	B
58	Corinne	6 violations	Yes	6	B-
59	Dammeron Valley	6 violations	Yes	5	B
60	Redmond	6 violations	Yes	4	A
61	Lehi	5 violations	Yes	17	F
62	Hurricane	5 violations	Yes	8	C+
63	Draper	5 violations	Yes	18	F
64	North Salt Lake	5 violations	Yes	4	C-
65	Ivins	5 violations	Yes	6	B+
66	Vernal	5 violations	Yes	1	C+
67	Price	5 violations	Yes	5	D
68	Ft. Duchesne	5 violations	Yes	18	F
69	Mount Pleasant	5 violations	Yes	17	C+
70	Gunnison	5 violations	Yes	12	A-
71	Enterprise	5 violations	Yes	15	B-
72	Monroe	5 violations	Yes	0	A-
73	Erda	5 violations	Yes	3	A-
74	Tabiona	5 violations	Yes	13	C-
75	Springdale	5 violations	Yes	0	A-
76	Dutch John	5 violations	Yes	0	B
77	Herriman	4 violations	Yes	13	D+
78	Tooele	4 violations	Yes	5	F
79	Magna	4 violations	Yes	1	B+
80	North Ogden	4 violations	Yes	13	D
81	Farr West	4 violations	Yes	7	B-
82	Beaver	4 violations	Yes	2	B
83	Mona	4 violations	Yes	4	A-
84	Fairview	4 violations	Yes	2	A-
85	Morni	4 violations	Yes	2	D
86	Montua	4 violations	Yes	7	B-
87	Henefer	4 violations	Yes	0	A
88	Newton	4 violations	Yes	1	A-
89	Escalante	4 violations	Yes	3	C+
90	Kanosh	4 violations	Yes	2	B+
91	Circleville	4 violations	Yes	3	C+
92	West Jordan	3 violations	Yes	7	C+
93	Brigham City	3 violations	Yes	14	C-
94	Smithfield	3 violations	Yes	3	F
95	Stansbury Park	3 violations	Yes	15	C+
96	Santa Clara	3 violations	Yes	0	B+
97	Roosevelt	3 violations	Yes	3	D
98	Ephraim	3 violations	Yes	1	A-
99	Alta	3 violations	Yes	2	C+
100	Manti	3 violations	Yes	1	B+
101	Panguitch	3 violations	Yes	0	B+
102	Honeyville	3 violations	Yes	9	B+
103	Wellington	3 violations	Yes	0	B+
104	Mendon	3 violations	Yes	1	A
105	Virgin	3 violations	Yes	0	A-
106	Fountain Green	3 violations	Yes	0	B
107	Fruitland	3 violations	Yes	15	B
108	Myton	3 violations	Yes	0	B+
109	Orderville	3 violations	Yes	5	A
110	Lincoln	3 violations	Yes	1	B-
111	Veyo	3 violations	Yes	5	A-
112	Sandy	2 violations	Yes	13	F
113	Eagle Mountain	2 violations	Yes	25	D
114	Clinton	2 violations	Yes	9	C+
115	Springville	2 violations	Yes	8	C
116	Hyrum	2 violations	Yes	0	A
117	Duchesne	2 violations	Yes	8	F
118	River Heights	2 violations	Yes	6	B+
119	Salina	2 violations	Yes	0	A-
120	Lewiston	2 violations	Yes	1	A
121	Millville	2 violations	Yes	8	A-
122	Centerfield	2 violations	Yes	2	D+
123	Woodland Hills	2 violations	Yes	4	B
124	Genola	2 violations	Yes	1	A
125	Milford	2 violations	Yes	3	A
126	Altamont	2 violations	Yes	2	B+
127	Goshen	2 violations	Yes	4	B
128	Bear River	2 violations	Yes	9	B+
129	Bullfrog	2 violations	Yes	0	B-
130	Annabella	2 violations	Yes	9	A-
131	Oak City	2 violations	Yes	8	B+
132	Clarkston	2 violations	Yes	2	A-
133	Benson	2 violations	Yes	1	A-
134	Mayfield	2 violations	Yes	0	A-
135	Paragonah	2 violations	Yes	9	A-
136	Saratoga Springs	1 violations	Yes	16	F
137	Plain City	1 violations	Yes	2	B
138	West Haven	1 violations	Yes	2	B+
139	West Point	1 violations	Yes	5	B
140	Grantsville	1 violations	Yes	7	C
141	Washington Terrace	1 violations	Yes	0	A-
142	Riverdale	1 violations	Yes	0	B+
143	Richfield	1 violations	Yes	13	A-
144	Nephi	1 violations	Yes	2	A-
145	Woods Cross	1 violations	Yes	0	A-
146	Perry	1 violations	Yes	2	A-
147	Fillmore	1 violations	Yes	0	A-
148	Garland	1 violations	Yes	1	C-
149	Toquerville	1 violations	Yes	1	A
150	Wendover	1 violations	Yes	2	A-
151	Clevland	1 violations	Yes	1	A
152	Uintah City	1 violations	Yes	0	A-
153	Spring City	1 violations	Yes	10	B+
154	Aurora	1 violations	Yes	0	A-
155	Green River	1 violations	Yes	5	B+
156	Minersville	1 violations	Yes	0	A
157	Montpelier	1 violations	Yes	0	A
158	City	1 violations	Yes	3	A-

FAQ

Frequently asked questions about arsenic in Utah

Is arsenic in Utah tap water a concern?

Yes — 158 cities in Utah have arsenic-related violations on record. The EPA MCL for arsenic is 10 µg/L. Even at levels below the MCL, long-term arsenic exposure has been linked to cancer and cardiovascular disease.

How can I remove arsenic from my drinking water in Utah?

Reverse osmosis (RO) systems are the most effective at removing arsenic, typically reducing it by 90% or more. Specialized arsenic-removal media (such as iron-based adsorption filters) are also highly effective. Standard carbon filters and pitcher filters do NOT effectively remove arsenic. If your water comes from a private well, have it tested for arsenic.

Where does arsenic in Utah water come from?

Arsenic enters drinking water primarily through natural erosion of arsenic-bearing rock formations. It is most common in groundwater systems in the western United States, parts of the Midwest, and New England. Industrial sources include mining, smelting, and agricultural pesticide residues. Groundwater sources are far more likely to contain arsenic than surface water.

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