Tap Water Quality Report
Tap water quality in Las Vegas, Nevada
Tap water in Las Vegas, Nevada receives a grade of F (55/100) from TapWaterSafety.org. It's served by LAS VEGAS VALLEY WATER DISTRICT. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Arsenic significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Las Vegas's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Las Vegas.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 43.2 ppb, 721x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.8 ppb, 451x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 49.4 ppb, 329x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for LAS VEGAS VALLEY WATER DISTRICT (system ID NV0000090) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for Las Vegas
Filters matched to the specific contaminants in Las Vegas's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in Las Vegas's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
43.2 ppb | 0.06 | — | — | — | — | — | 721× over |
| Arsenic Heavy metal |
1.8 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 451× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
49.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 329× over |
| Bromodichloromethane Disinfection byproduct |
15.3 ppb | 0.06 | — | — | — | — | — | 255× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
24.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 244× over |
| Dibromochloromethane Disinfection byproduct |
12.8 ppb | 0.1 | — | — | — | — | — | 128× over |
| Dibromoacetic acid Disinfection byproduct |
3.68 ppb | 0.03 | — | — | — | — | — | 123× over |
| Dichloroacetic acid Disinfection byproduct |
14.3 ppb | 0.2 | — | — | — | — | — | 71× over |
| Trichloroacetic acid Disinfection byproduct |
5.78 ppb | 0.1 | — | — | — | — | — | 58× over |
| Chloroform Disinfection byproduct |
19.0 ppb | 0.4 | — | — | — | — | — | 47× over |
| Bromate* Disinfection byproduct |
4.04 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 40× over |
| Nitrate Inorganic |
1.77 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 13× over |
| Nitrate and nitrite Inorganic |
1.77 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 13× over |
| Chromium (hexavalent) Heavy metal |
0.204 ppb | 0.02 | — | — | — | — | — | 10× over |
| Bromoform Disinfection byproduct |
2.43 ppb | 0.5 | — | — | — | — | — | 4.9× over |
| Uranium Radiological |
1.38 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 3.2× over |
| Radium, combined (-226 and -228) Radiological |
0.11 pCi/L | 0.05 | 5.0 | — | — | — | — | 2.1× over |
| Perchlorate* Disinfection byproduct |
0.825 ppb | 1.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
79.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
58.3 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Selenium Heavy metal |
1.33 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Molybdenum Other |
0.726 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.366 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.591 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.08 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.123 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.957 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
0.257 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Di(2-ethylhexyl) adipate Other |
0.0195 ppb | 200.0 | 400.0 | — | — | — | — | Below guideline |
| Bromide Other |
70.2 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.476 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Testosterone Other |
0.011 ppt | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from LAS VEGAS VALLEY WATER DISTRICT.
General Contact
Treatment Plant
ZIP codes served
Las Vegas's public water systems serve the following ZIP codes: