We read 16 results from Las Vegas Valley Water District’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 1,539,277 people · Water system ID NV0000090 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Copper90th percentile of 55 homes tested, 1 over the action level · Customer taps (55 samples) · 2025 report, page 3 | 0.82 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal2.7x the health goal |
| Lead90th percentile of 55 homes tested · Customer taps (55 samples) · 2025 report, page 3 | 2.1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal11x the health goal |
| Total coliform bacteriahighest month · Distribution system · 2025 report, page 3 | 1 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Uraniumaverage · range 3.6 to 4.1 · Alfred Merritt Smith facility, highest of 2 sources · 2025 report, page 3 | 3.8 ppb | 0.6 ppb | 30 ppb | Above the health goal6.3x the health goal |
| Chlorinehighest running annual average · Distribution system · 2025 report, page 3 | 0.99 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · Distribution system · 2025 report, page 3 | 44 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · Distribution system · 2025 report, page 3 | 72 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.65 to 0.76 · River Mountains facility, highest of 2 sources · 2025 report, page 3 | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · District wells · 2025 report, page 3 | 5.3 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFOA (a PFAS)as reported · printed as N/D ppb · Entry points (UCMR 5) · 2025 report, page 4 | Not detected | 0.007 ppt | 4 ppt from 2029 | Not detected |
| PFOS (a PFAS)as reported · printed as N/D ppb · Entry points (UCMR 5) · 2025 report, page 4 | Not detected | 1 ppt | 4 ppt from 2029 | Not detected |
| Turbidity (cloudiness)highest measured · River Mountains facility, highest of 2 sources · 2025 report, page 3 | 0.1 NTU | None set | 1 NTU | Below the legal limit |
| Hardnessas reported · System · 2025 report, page 4 | 16.4 gpg (280 ppm) | — | — | Very hard |
| Lithiumaverage · range 9.3 to 43 · Entry points (UCMR 5) · 2025 report, page 4 | 34 ppb | None set | None | No health limit |
| PFHxA (a PFAS)average · range 4.1 to 5.6 · printed as 0.0049 ppb · Entry points (UCMR 5) · 2025 report, page 4 | 4.9 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range 4 to 4.8 · printed as 0.0044 ppb · Entry points (UCMR 5) · 2025 report, page 4 | 4.4 ppt | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Las Vegas Valley Water District’s water between Feb 2025 and Dec 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium43.3 ppbFound in 50 of 59 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Lead
Found: Copper, Lead
What removes it: Reverse osmosis or Certified carbon block or RO.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
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