129 public water systems in Utah were sampled in EPA's UCMR 5 programme (2023–2025); we show six PFAS and lithium. Read 2026-10-31.
4 of 129 systems had at least one sample above a 2024 federal limit; 91 had at least one PFAS found above the reporting level; 38 had none found above the reporting level.
A single sample above a 2024 limit is a measurement, not a violation. Compliance is judged on running yearly averages, and water systems have until 2029 to meet the limits. On 20 May 2026 EPA proposed giving qualifying systems until 2031 for PFOA and PFOS and removing the limits for PFHxS, PFNA and HFPO-DA; those proposals were not final when we last checked (5 Nov 2026). Counts are per system, not per person; population figures are available only for systems serving more than 25,000 people (about 2,681,143 people across those systems here). UCMR 5 was a one-time national monitoring programme (2023–2025). The results are a snapshot at the system's entry points or taps on the sample dates, not a continuous measurement and not a compliance record.
| System | People served | UCMR 5 result |
|---|---|---|
| Salt Lake City Salt Lake City Water System | 383,612 | Above the 2024 limit in at least one sample |
Pages for these are being added in stages. The data for all 129 systems is in the public dataset.
| System | People served | UCMR 5 result |
|---|---|---|
| Granger-Hunter Improvement District Granger-Hunter Improvement District | 121,083 | None detected (below the reporting level) |
| West Jordan City Water System West Jordan City Water System | 117,025 | Detected, below the 2024 limit |
| Provo City Provo City | 116,288 | None detected (below the reporting level) |
| St George City Water System St George City Water System | 105,240 | None detected (below the reporting level) |
| Sandy City Water System Sandy City Water System | 99,750 | None detected (below the reporting level) |
| Jordan Valley Wcd Jordan Valley Wcd | 99,335 | None detected (below the reporting level) |
| Orem City Water System Orem City Water System | 98,129 | None detected (below the reporting level) |
| Lehi City Lehi City | 93,446 | None detected (below the reporting level) |
| South Jordan City South Jordan City | 89,704 | None detected (below the reporting level) |
| Ogden City Water System Ogden City Water System | 87,267 | None detected (below the reporting level) |
| Layton City Water System Layton City Water System | 82,000 | None detected (below the reporting level) |
| Saratoga Springs City, Ut Saratoga Springs City, Ut | 68,000 | None detected (below the reporting level) |
| Taylorsville-Bennion Id Taylorsville-Bennion Id | 67,098 | None detected (below the reporting level) |
| Eagle Mountain City Eagle Mountain City | 61,266 | None detected (below the reporting level) |
| Herriman City Municipal Water Department Herriman City Municipal Water Department | 60,000 | None detected (below the reporting level) |
| University of Utah University of Utah | 57,080 | None detected (below the reporting level) |
| Kearns Improvement District Kearns Improvement District | 56,700 | None detected (below the reporting level) |
| Logan City Water System Logan City Water System | 55,540 | None detected (below the reporting level) |
| Spanish Fork City Spanish Fork City | 47,169 | None detected (below the reporting level) |
| Washington City Washington City | 45,865 | None detected (below the reporting level) |
| Riverton City Water System Riverton City Water System | 45,600 | None detected (below the reporting level) |
| Tooele City Water System Tooele City Water System | 41,770 | None detected (below the reporting level) |
| Pleasant Grove City Pleasant Grove City | 40,000 | None detected (below the reporting level) |
| Cedar City Waterworks Cedar City Waterworks | 39,670 | None detected (below the reporting level) |
| American Fork City American Fork City | 39,045 | None detected (below the reporting level) |