Every Utah public water system that reported a PFAS detection during EPA UCMR 5 monitoring, how many sit above the 2024 federal limits, and the standard Utah applies. Concentrations are in nanograms per litre, the same unit as parts per trillion.
This is the United States view of the North American PFAS dataset. The complete dataset, including all 3,452 US systems and 97 Canadian sites, lives on the main PFAS contamination map.
Federal EPA limit applies
Utah DEQ follows federal MCL; Hill AFB long-standing site.
Compound
Limit (ng/L)
Note
PFOA
4
PFOS
4
PFHxS
10
PFNA
10
HFPO-DA (GenX)
10
Mixture
Not numeric
Hazard Index ≤ 1 (PFHxS, PFNA, HFPO-DA, PFBS)
US EPA, PFAS National Primary Drinking Water Regulation (2024)
US EPA PFAS National Primary Drinking Water Regulation (2024)
Last reviewed 2026-08-13. Verify against the agency source before making a compliance or remediation decision.
Ranked by how far the worst single compound sits above its 2024 federal limit. Values are the maximum each system reported during its UCMR 5 monitoring period.
Water system
PWSID
Worst compound
Max ng/L
Times the limit
Hildale - Colorado City
UTAH27006
PFOS
26
6.5x
Salt Lake City Water System
UTAH18026
PFHxS
18.2
1.8x
Park City Water System
UTAH22011
PFOS
6.7
1.7x
South Davis Water District
UTAH06009
PFHxS
12
1.2x
Murray City Water System
UTAH18024
PFOA
4
1.0x
Brigham City Water System
UTAH02004
PFBS
4.9
Below limit
Centerville City Water System
UTAH06001
PFBS
4.3
Below limit
Farmington City Water System
UTAH06004
6:2 FTS
30
Below limit
Syracuse City Water System
UTAH06012
PFBA
7.4
Below limit
Bountiful City Water System
UTAH06015
PFBS
3.7
Below limit
West Point City Water System
UTAH06020
PFBA
15
Below limit
Woods Cross City Water
UTAH06021
PFBS
3.8
Below limit
West Jordan City Water System
UTAH18020
PFHxA
4.6
Below limit
South Salt Lake City Water System
UTAH18032
PFBA
13
Below limit
Herriman City Municipal Water Department
UTAH18157
PFHxA
8.5
Below limit
Mountain Regional Water Ssd
UTAH22137
6:2 FTS
55
Below limit
Open the full map and filter Utah pins
Every count above is read straight from a published government file. Nothing is modelled, averaged, or estimated. The rules below are the exact rules used to produce the figures for Utah.
Who is in UCMR 5. All public water systems serving more than 3,300 people, plus a national sample of 800 smaller systems. Private wells and most small systems are not monitored, so they cannot appear here.
Which systems are listed. Only systems whose state field is UT and that reported at least one measured PFAS detection. Systems that monitored and found nothing are not shown, and their absence is not evidence of contamination. That gives 16 systems in Utah.
Systems that cannot be placed. 87 systems nationally reported a detection but have no serviced ZIP code published by EPA, so they carry no location and are excluded from these counts. National totals on the map page include them.
Which value is used. The highest result a system reported for each compound across its sampling events. Results flagged by EPA as non-detects are excluded, as are the lithium results carried in the same file.
The above a limit count. A system is counted when its maximum result for a compound exceeds the 2024 federal Maximum Contaminant Level: 4 ng/L for PFOA and PFOS, 10 ng/L for PFHxS, PFNA, and HFPO-DA. That is 4 systems in Utah.
The Hazard Index count. Calculated with EPA's own mixture method for PFHxS, PFNA, HFPO-DA, and PFBS. A system is counted when the index is above 1. That is 3 systems in Utah.
What monitoring data is not. Exceeding a 2024 limit in this dataset is not a compliance violation. The federal limits carry a 2029 compliance date, which EPA proposed on 18 May 2026 to move to 2031 for PFOA and PFOS in a rule that is not final, and treatment may have been installed since the sample was taken.
If any figure on this page does not match its source file, tell Nelson and it will be corrected or removed.
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