States → Utah
State profile · EPA SDWIS + UCMR5
Utah Drinking Water Quality
1,068 public water systems serve 3,870,776 people across Utah, with every Safe Drinking Water Act violation and UCMR5 PFAS result on record.
- 1,068
- Water systems
- 169,784
- Total violations
- 97.6%
- Systems w/ a violation
- 70.5%
- PFAS detection rate
The verdict
Across Utah, 1,042 of 1,068 water systems (97.6%) carry at least one EPA violation, and 91 of 129 UCMR5-tested systems show PFAS.
- 169,784
- Total EPA violations on record
- 6%
- Health-based (MCL / treatment)
- 97.6%
- Systems with ≥1 violation
- 70.5%
- UCMR5 PFAS detection rate
Water Systems
1,068
Total Violations
169,784
Violation Rate
97.6%
PFAS Detection
70.5%
91 of 129 tested
Violation Composition
How Utah's 169,784 violations break down by type, per EPA SDWIS classification.
Health-based (10,671) Monitoring/Reporting (159,113)
| Metric | Value | Share |
|---|---|---|
| Public water systems | 1,068 | - |
| Population served | 3,870,776 | - |
| Total violations | 169,784 | 100% |
| Health-based violations | 10,671 | 6.3% |
| Systems with violations | 1,042 | 97.6% |
| PFAS detection rate | 91 of 129 | 70.5% |
Health-based violations indicate the contaminant exceeded an EPA Maximum Contaminant Level (MCL) or treatment-technique requirement. Monitoring/reporting violations indicate procedural issues (missed tests, late reports) - not necessarily a contamination event.
Largest Water Systems
Salt Lake City Water System
Salt Lake City, UT · 381,174 served
Granger-Hunter Improvement District
Salt Lake City, UT · 121,083 served
West Jordan City Water System
West Jordan, UT · 117,025 served
Provo City
Provo, UT · 116,288 served
St George City Water System
St George City, UT · 105,240 served
Sandy City Water System
Sandy, UT · 99,750 served
Jordan Valley Wcd
West Jordan, UT · 99,335 served
Orem City Water System
Orem, UT · 98,129 served
South Jordan City
South Jordan, UT · 87,356 served
Ogden City Water System
Brigham City, UT · 87,267 served
Layton City Water System
Layton, UT · 82,000 served
Lehi City
Lehi, UT · 79,978 served
Taylorsville-Bennion ID
Riverton, UT · 67,098 served
Eagle Mountain City
Eagle Mountain, UT · 61,266 served
Herriman City Municipal Water Department
Herriman, UT · 60,000 served
Saratoga Springs City
Saratoga Springs, UT · 58,000 served
University of Utah
Sandy, UT · 57,080 served
Kearns Improvement District
Kearns, UT · 56,700 served
Logan City Water System
Wellsville, UT · 55,540 served
Spanish Fork City
Spanish Fork, UT · 47,169 served
Most Violations
#1 Big Plains Water Ssd - Cedar Point Apple Valley
1,897 #2 Tooele City Water System Tooele
1,670 #3 Rockland Ranch Monticello
1,661 #4 Snowbasin Resort Huntsville
1,492 #5 Eureka Town Eureka
1,281 #6 M & J Trailer Home Community Sandy
1,267 #7 Herriman City Municipal Water Department Herriman
1,210 #8 Pine Valley Irrigation Co St George
1,166 #9 Woodenshoe Water Company Salt Lake City
1,154 #10 Holliday Water Company Salt Lake City
1,132 #11 Fairfield Culinary Water System Fairfield
1,115 #12 Amalga Town Water System Amalga
1,100 #13 Cedar Fort Water System Cedar Valley
1,046 #14 Big Plains Water Ssd - Apple Valley Apple Valley
1,046 #15 Hildale - Colorado City Hildale
991 Counties in Utah
Salt Lake
77 systems · 1,463,023 served
· 13,678 violations
Utah
85 systems · 734,522 served
· 16,257 violations
Davis
25 systems · 411,806 served
· 3,162 violations
Weber
59 systems · 297,962 served
· 9,379 violations
Washington
61 systems · 246,683 served
· 14,833 violations
Cache
45 systems · 139,014 served
· 9,272 violations
Tooele
34 systems · 72,658 served
· 5,457 violations
Box Elder
49 systems · 65,132 served
· 9,379 violations
Iron
41 systems · 60,975 served
· 9,246 violations
Wasatch
59 systems · 55,668 served
· 8,761 violations
Summit
78 systems · 49,848 served
· 9,896 violations
Uintah
24 systems · 35,486 served
· 1,247 violations
Sanpete
38 systems · 32,759 served
· 7,185 violations
Sevier
34 systems · 22,920 served
· 4,309 violations
Carbon
21 systems · 22,864 served
· 1,737 violations
Duchesne
31 systems · 22,426 served
· 3,779 violations
Grand
21 systems · 22,221 served
· 3,250 violations
Morgan
27 systems · 16,698 served
· 3,489 violations
Kane
32 systems · 15,684 served
· 4,532 violations
Juab
15 systems · 13,808 served
· 2,949 violations
Emery
20 systems · 13,626 served
· 2,451 violations
Millard
28 systems · 12,855 served
· 5,123 violations
Garfield
53 systems · 9,783 served
· 5,624 violations
San Juan
28 systems · 9,658 served
· 5,217 violations
Beaver
18 systems · 7,111 served
· 1,180 violations
Rich
22 systems · 5,207 served
· 2,716 violations
Wayne
18 systems · 4,533 served
· 2,003 violations
Daggett
13 systems · 3,908 served
· 1,931 violations
Piute
12 systems · 1,938 served
· 1,742 violations
Drinking Water Guides
Frequently Asked Questions
How many water systems are in Utah? ▼
Utah has 1,068 public water systems serving approximately 3,870,776 people. These include community water systems, non-transient non-community systems, and transient non-community systems regulated under the Safe Drinking Water Act.
How many drinking water violations are in Utah? ▼
Utah has 169,784 total drinking water violations on record, with 10,671 classified as health-based violations. 97.6% of water systems in the state have at least one violation.
Has PFAS been found in Utah drinking water? ▼
Of 129 water systems tested for PFAS in Utah, 91 had PFAS detected, a 70.5% detection rate. PFAS are persistent "forever chemicals" that do not break down in the environment.
What is the violation rate for Utah water systems? ▼
Utah's violation rate is 97.6%. This measures the percentage of public water systems that have at least one recorded violation in the EPA SDWIS database, including both health-based and monitoring/reporting violations.
Where does this Utah water data come from? ▼
All drinking water data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS is the federal database that tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources & Methodology
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.