59 public water systems in Nevada were sampled in EPA's UCMR 5 programme (2023–2025); we show six PFAS and lithium. Read 2026-10-31.
3 of 59 systems had at least one sample above a 2024 federal limit; 52 had at least one PFAS found above the reporting level; 7 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 2,779,326 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 |
|---|---|---|
| Las Vegas Las Vegas Valley Water District | 1,539,277 | None detected (below the reporting level) |
| Truckee Meadows Water Authority Truckee Meadows Water Authority | 442,000 | Above the 2024 limit in at least one sample |
| North Las Vegas North Las Vegas Utilities | 376,515 | None detected (below the reporting level) |
Pages for these are being added in stages. The data for all 59 systems is in the public dataset.
| System | People served | UCMR 5 result |
|---|---|---|
| Henderson City of Henderson City of | 336,534 | None detected (below the reporting level) |
| Carson City Public Works Carson City Public Works | 59,000 | None detected (below the reporting level) |
| Virgin Valley Water District Virgin Valley Water District | 26,000 | None detected (below the reporting level) |
| Kingsbury Gid Kingsbury Gid | — | None detected (below the reporting level) |
| Lander Co Sewer and Water Dist 1 Bm Lander Co Sewer and Water Dist 1 Bm | — | None detected (below the reporting level) |
| Boulder City Boulder City | — | None detected (below the reporting level) |
| Dayton Valley Water System Dayton Valley Water System | — | None detected (below the reporting level) |
| Great Basin Water Co Spring Creek Great Basin Water Co Spring Creek | — | None detected (below the reporting level) |
| Ely Municipal Water Department Ely Municipal Water Department | — | None detected (below the reporting level) |
| Fallon City of Fallon City of | — | None detected (below the reporting level) |
| Fernley Public Works Fernley Public Works | — | Above the 2024 limit in at least one sample |
| Gardnerville Water Company Gardnerville Water Company | — | Detected, below the 2024 limit |
| Gardnerville Ranchos Gid Gardnerville Ranchos Gid | — | None detected (below the reporting level) |
| Incline Village Gid Incline Village Gid | — | None detected (below the reporting level) |
| Moapa Valley Water District Moapa Valley Water District | — | None detected (below the reporting level) |
| Lovelock Meadows Water District Lovelock Meadows Water District | — | None detected (below the reporting level) |
| Town of Minden Town of Minden | — | None detected (below the reporting level) |
| Great Basin Water Co Cold Springs Great Basin Water Co Cold Springs | — | Detected, below the 2024 limit |
| Sun Valley Gid Sun Valley Gid | — | None detected (below the reporting level) |
| Edgewood Water Company Edgewood Water Company | — | None detected (below the reporting level) |
| West Wendover Water System West Wendover Water System | — | None detected (below the reporting level) |
| Winnemucca City of Winnemucca City of | — | None detected (below the reporting level) |
| Yerington City of Yerington City of | — | None detected (below the reporting level) |
| Great Basin Water Company Great Basin Water Company | — | None detected (below the reporting level) |
| Elko City of Elko City of | — | Above the 2024 limit in at least one sample |