Utah Water Report Card: Worst Water Systems
The most contaminated public water systems in Utah, ranked by PFAS levels, lead, and EPA violations from official EPA data.
Quick Answer
Mountain Regional Water Ssd has the highest PFAS in Utah at 55 ppt (14x the EPA limit). Vineyard City has the highest lead at 54.3 ppb. The tables below rank the worst systems in each category so you can see how your water compares.
Highest PFAS Levels in Utah
Public water systems in Utah with the highest peak PFAS ("forever chemical") reading in EPA UCMR5 testing (2023-2025). The EPA enforceable limit for PFOA and PFOS is 4 ppt.
| # | Water System | Location | Peak PFAS (ppt) | Compounds | vs 4 ppt limit |
|---|---|---|---|---|---|
| 1 | Mountain Regional Water Ssd | Park City · 8,245 served | 55 | 3 | 14x |
| 2 | Farmington City Water System | Ogden · 27,860 served | 30 | 1 | 8x |
| 3 | Hildale - Colorado City | Hildale · 6,100 served | 26 | 6 | 7x |
| 4 | Salt Lake City Water System | Salt Lake City · 381,174 served | 18.2 | 4 | 5x |
| 5 | South Salt Lake City Water System | Coalville · 23,600 served | 13 | 1 | 3x |
| 6 | South Davis Water District | Bountiful · 10,565 served | 12 | 3 | 3x |
| 7 | Murray City Water System | West Jordan · 38,723 served | 8.9 | 5 | 2x |
| 8 | Herriman City Municipal Water Department | Herriman · 60,000 served | 8.5 | 1 | 2x |
| 9 | Syracuse City Water System | Syracuse · 35,561 served | 7.4 | 1 | 2x |
| 10 | Park City Water System | Park City · 8,875 served | 6.7 | 5 | 2x |
| 11 | Brigham City Water System | West Haven · 20,540 served | 4.9 | 1 | 1x |
| 12 | West Jordan City Water System | West Jordan · 117,025 served | 4.6 | 2 | 1x |
Highest Lead Levels in Utah
Community water systems in Utah with the highest 90th-percentile lead result under the EPA Lead and Copper Rule. The EPA action level is 15 ppb; there is no safe level of lead for children.
| # | Water System | Location | Lead 90th-pctile (ppb) | vs 15 ppb |
|---|---|---|---|---|
| 1 | Vineyard City | Saratoga Springs · 21,431 served | 54.3 | 3.6x over |
| 2 | Smithfield City | Smithfield · 10,223 served | 46 | 3.1x over |
| 3 | Willard City Water System | Preston · 2,036 served | 41.6 | 2.8x over |
| 4 | Midvale City Water System | Eagle Mountain · 33,005 served | 25.5 | 1.7x over |
| 5 | Roy City Water System | Roy · 38,800 served | 23.7 | 1.6x over |
| 6 | Garland City Water System | Garland · 2,400 served | 16.1 | 1.1x over |
| 7 | North Salt Lake City Water System | North Salt Lake · 18,655 served | 16 | 1.1x over |
| 8 | Liberty Pipeline Company | Eden · 1,750 served | 16 | 1.1x over |
| 9 | Emigration Improvement District | Salt Lake City · 1,000 served | 15.2 | 1.0x over |
| 10 | Waterpro Inc | Draper · 33,100 served | 14.8 | within |
| 11 | Kanab City | Kanab · 4,985 served | 14.1 | within |
| 12 | Washington City | Hurricane · 45,865 served | 14 | within |
Most EPA Violations in Utah
Community water systems in Utah with the most health-based EPA Safe Drinking Water Act violations on record. A health-based violation means a contaminant exceeded its federal limit or required treatment was not applied.
| # | Water System | Location | Health-based violations |
|---|---|---|---|
| 1 | Diamond Valley Acres | St George · 1,340 served | 4 |
| 2 | Enoch City Water System | Cedar City · 6,500 served | 4 |
| 3 | Clinton City Water System | Clinton · 23,000 served | 3 |
| 4 | East Carbon City | East Carbon · 1,460 served | 3 |
| 5 | Clearfield City Water System | Brigham City · 33,540 served | 3 |
| 6 | Pleasant Grove City | Orem · 40,000 served | 3 |
| 7 | Hildale - Colorado City | Hildale · 6,100 served | 3 |
| 8 | Eden Waterworks System | Eden · 1,350 served | 3 |
| 9 | Liberty Pipeline Company | Eden · 1,750 served | 3 |
| 10 | Uintah Highlands Improvement District | Ogden · 2,480 served | 3 |
| 11 | Lindon City | Spanish Fork · 11,900 served | 2 |
| 12 | Blanding City | Blanding · 3,760 served | 2 |
How This Report Card Is Built
PFAS rankings use EPA UCMR5 monitoring (2023-2025), showing each system's peak detection above the 4 ppt EPA limit. Lead rankings use the EPA Lead and Copper Rule 90th-percentile tap results. Violation counts come from the EPA Safe Drinking Water Information System (SDWIS) and count health-based violations. Lead and violation lists are limited to community water systems serving 1,000 or more people. Figures are the most severe on record and do not necessarily reflect current treated water.
Frequently Asked Questions
What is the most PFAS-contaminated water system in Utah?
In EPA UCMR5 testing (2023-2025), Mountain Regional Water Ssd in Park City had the highest recorded PFAS level in Utah at 55 ppt - about 14x the EPA's 4 ppt limit for PFOA and PFOS.
Which Utah water system has the highest lead levels?
Vineyard City in Saratoga Springs had the highest 90th-percentile lead result in Utah under the EPA Lead and Copper Rule at 54.3 ppb - 3.6x the 15 ppb action level.
Which Utah water system has the most EPA violations?
Diamond Valley Acres in St George has the most health-based EPA Safe Drinking Water Act violations on record in Utah, with 4 violations.
Where does the Utah water report card data come from?
PFAS figures come from EPA UCMR5 monitoring (2023-2025), lead from the EPA Lead and Copper Rule 90th-percentile tap results, and violations from EPA SDWIS health-based violation records. Figures are the most severe on record and do not necessarily reflect current treated water. Check your exact address at knowyourexposure.com.
What Utah Residents Should Do
- Look up your exact address at knowyourexposure.com for your system's data
- See the full Utah water quality overview
- If your system is listed, a certified filter (reverse osmosis for PFAS, NSF-53 for lead) reduces exposure at the tap. See the best water filters.