Drinking water quality · 2024
· Verified
What's in Henderson, NV tap water
16 contaminants were measured in the Henderson, NV water system's 2024 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 16
- Over federal limit
- 1
- Approaching the limit
- 1
- Worst contaminant
- Lead
- Service area
- NV
Where your water comes from · EPA SDWIS
Henderson, NV buys its drinking water from SOUTHERN NEVADA WATER SYSTEM.
Source
Treatment
- R-24 AERATOR ST29
- R-24A AERATOR ST30
- CHLORINATOR FOR CC FROM AMS TP AT SNWS
- + 7 more
Distribution
Also buys water from SOUTHERN NEVADA WATER SYSTEM.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 20 ug/LMaximumCity of Henderson Distribution System | 0 ug/LMCLG | At or above the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1.9 ug/LAverageRiver Mountains Water Treatment Facility | None set | Within the limit |
+By source (2)— River Mountains Water Treatment Facility, Alfred Merritt Smith Water Treatment Facility
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.1 mg/LAverageAlfred Merritt Smith Water Treatment Facility | 2 mg/LMCL | Within the limit |
+By source (2)— Alfred Merritt Smith Water Treatment Facility, River Mountains Water Treatment Facility
| |||
| SeleniumA trace element from natural deposits and industrial discharge. | 2.4 ug/LAverageRiver Mountains Water Treatment Facility | None set | Within the limit |
+By source (2)— Alfred Merritt Smith Water Treatment Facility, River Mountains Water Treatment Facility
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.86 %AverageCity of Henderson Distribution System | 1.3 %MCLG | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 53 ug/LAverageDistribution System | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 66 ug/LAverageCity of Henderson Distribution System | None set | Approaching the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 28 ug/LAverageCity of Henderson Distribution System | None set | Within the limit |
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 4.3 ug/LAverageRiver Mountains Water Treatment Facility | None set | Within the limit |
+By source (2)— Alfred Merritt Smith Water Treatment Facility, River Mountains Water Treatment Facility
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.9 pCi/LAverageRiver Mountains Water Treatment Facility | 15 pCi/LMCL | Within the limit |
+By source (2)— River Mountains Water Treatment Facility, Alfred Merritt Smith Water Treatment Facility
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 4 ug/LAverageRiver Mountains Water Treatment Facility | 30 ug/LMCL | Within the limit |
+By source (2)— River Mountains Water Treatment Facility, Alfred Merritt Smith Water Treatment Facility
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Free | 0.78 mg/LAverageCity of Henderson Distribution System | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.71 mg/LAverageCity of Henderson Distribution System | 4 mg/LMCL | Within the limit |
+By source (3)— River Mountains Water Treatment Facility, City of Henderson Distribution System, Alfred Merritt Smith Water Treatment Facility
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.61 mg/LAverageRiver Mountains Water Treatment Facility | 10 mg/LMCL | Within the limit |
+By source (2)— River Mountains Water Treatment Facility, Alfred Merritt Smith Water Treatment Facility
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.08 NTUHighest single sampleAlfred Merritt Smith Water Treatment Facility | None set | Within the limit |
+By source (2)— Alfred Merritt Smith Water Treatment Facility, River Mountains Water Treatment Facility
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0.3 %AverageCity of Henderson Distribution System | None set | Detected — no federal limit |
People also ask about Henderson, NV's water
+Is Henderson, NV tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Henderson, NV water utility lists 1 contaminant at or above the federal limit: Lead. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Henderson, NV tap water?
16 contaminants were measured in Henderson, NV's 2024 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 7 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Henderson, NV tap water?
One contaminant in Henderson, NV's 2024 report sits at or above the federal limit: Lead (1.3× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Henderson, NV tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Lead, at 1.3× the federal threshold. It belongs to the metals family of contaminants.
+Are any contaminants in Henderson, NV tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: TTHM. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Henderson, NV's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Henderson, NV's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.