Tap Water Quality Report
Tap water quality in Henderson, Nevada
Tap water in Henderson, Nevada receives a grade of F (59/100) from TapWaterSafety.org. It's served by HENDERSON CITY OF. 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 Henderson's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Henderson.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 34.7 ppb, 579x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.45 ppb, 363x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 48.0 ppb, 320x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for HENDERSON CITY OF (system ID NV0000076) 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 Henderson
Filters matched to the specific contaminants in Henderson'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 Henderson'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 |
34.7 ppb | 0.06 | — | — | — | — | — | 579× over |
| Arsenic Heavy metal |
1.45 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 363× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
48.0 ppb | 0.15 | 80.0 | 100 | — | — | — | 320× over |
| Bromodichloromethane Disinfection byproduct |
15.3 ppb | 0.06 | — | — | — | — | — | 254× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
18.9 ppb | 0.1 | 60.0 | 60 | — | — | — | 189× over |
| Dibromochloromethane Disinfection byproduct |
13.5 ppb | 0.1 | — | — | — | — | — | 135× over |
| Dibromoacetic acid Disinfection byproduct |
3.34 ppb | 0.03 | — | — | — | — | — | 111× over |
| Dichloroacetic acid Disinfection byproduct |
10.6 ppb | 0.2 | — | — | — | — | — | 53× over |
| Trichloroacetic acid Disinfection byproduct |
4.82 ppb | 0.1 | — | — | — | — | — | 48× over |
| Chloroform Disinfection byproduct |
16.7 ppb | 0.4 | — | — | — | — | — | 42× over |
| Uranium Radiological |
2.49 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 5.8× over |
| Bromoform Disinfection byproduct |
2.46 ppb | 0.5 | — | — | — | — | — | 4.9× over |
| Nitrate Inorganic |
0.524 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.7× over |
| Nitrate and nitrite Inorganic |
0.524 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.7× over |
| Chromium (hexavalent) Heavy metal |
0.0571 ppb | 0.02 | — | — | — | — | — | 2.9× over |
| Chlorate Disinfection byproduct |
107.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
103.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Bromochloromethane Other |
0.00675 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
2.08 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Molybdenum Other |
2.55 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.816 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.17 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.059 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
1.18 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.0184 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Bromide Other |
4.33 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.711 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
55.0 ppb | — | — | — | — | — | — | 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 HENDERSON CITY OF.