Drinking water quality · 2023
· Verified
What's in West Valley Water District — Rialto, Ca, CA tap water
37 contaminants were measured in the West Valley Water District — Rialto, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 5 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 37
- Over federal limit
- 5
- Approaching the limit
- 0
- Worst contaminant
- Lead
- Service area
- CA
2.7× the limit
state-level CCR
At or above the federal limit
- LeadMetals · Reported level40 ug/L
- Perfluorohexanesulfonic acidPFAS ("forever chemicals") · Reported level0–22 ng/Llimit 3 ng/L · 2.2× the limit
- PFOSPFAS ("forever chemicals") · Reported level0–8.3 ng/Llimit 6.5 ng/L · 2.1× the limit
- TurbidityPhysical & aggregate · Reported level1.8 NTUlimit 1 NTU · 1.8× the limit
- PFOAPFAS ("forever chemicals") · Reported level0–5.3 ng/Llimit 5.1 ng/L · 1.3× the limit
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.
- Maximum contaminant level exceededHealth-based4 violations on record · most recent Jun 1987resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 40 ug/LReported levelSystem-wide | None set | At or above the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0.38–7.6 ug/LReported levelWells | None set | Within the limit |
+By source (6)— Wells, Baseline Feeder, Lytle Creek +3 more
| |||
| CopperA metal that enters water from corroding household plumbing. | 90 ug/LReported levelResult Type | 1300 ug/LAction level | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 46–380 ug/LReported levelState Water Project | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 48 mg/LReported levelLytle Creek | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 8.6 mg/LReported levelState Water Project | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 7.4–34 ug/LReported levelState Water Project | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 38 mg/LReported levelState Water Project | None set | Detected — no federal limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0–22 ng/LReported levelBaseline Feeder | 3 ng/LNL | At or above the limit |
+By source (4)— Baseline Feeder, Fluidized Bed Reactors (FBR), Ion Exchange Perchlorate Treatment +1 more
| |||
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0–8.3 ng/LReported levelIon Exchange Perchlorate Treatment | 6.5 ng/LNL | At or above the limit |
+By source (4)— Ion Exchange Perchlorate Treatment, Baseline Feeder, Fluidized Bed Reactors (FBR) +1 more
| |||
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 0–5.3 ng/LReported levelIon Exchange Perchlorate Treatment | 5.1 ng/LNL | At or above the limit |
+By source (4)— Ion Exchange Perchlorate Treatment, Baseline Feeder, Fluidized Bed Reactors (FBR) +1 more
| |||
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 2.5–13 ng/LReported levelFluidized Bed Reactors (FBR) | 500 ng/LNL | Detected — no federal limit |
+By source (4)— Fluidized Bed Reactors (FBR), Baseline Feeder, Ion Exchange Perchlorate Treatment +1 more
| |||
| PFAS | 0–2.5Reported levelBaseline Feeder | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 1.8 NTUReported levelState Water Project | 1 NTUMCL | At or above the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 130–170 mg/LReported levelLytle Creek | None set | Detected — no federal limit |
| ColorA measure of visible tint in the water. | 5Reported levelState Water Project | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 150 mg/LReported levelLytle Creek | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 1Reported levelLytle Creek | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.1–7.8Reported levelLytle Creek | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 360Reported levelState Water Project | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 0.26–2 mg/LReported levelOliver P. Roemer Filtration Facility | None set | Detected — no federal limit |
+By source (2)— Oliver P. Roemer Filtration Facility, Fluidized Bed Reactors (FBR)
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 220 mg/LReported levelLytle Creek | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2–7.4 mg/LReported levelIon Exchange Perchlorate Treatment | 10 mg/LMCL | Within the limit |
+By source (5)— Ion Exchange Perchlorate Treatment, Baseline Feeder, Fluidized Bed Reactors (FBR) +2 more
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.22–0.36 mg/LReported levelFluidized Bed Reactors (FBR) | 4 mg/LMCL | Within the limit |
+By source (5)— Fluidized Bed Reactors (FBR), Baseline Feeder, Wells +2 more
| |||
| ChlorideA naturally occurring salt compound. | 43 mg/LReported levelState Water Project | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 29 mg/LReported levelState Water Project | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.08–2.51 mg/LReported levelFluidized Bed Reactors (FBR) | 4 mg/LMCL | Within the limit |
+By source (3)— Fluidized Bed Reactors (FBR), Ion Exchange Perchlorate Treatment, Oliver P. Roemer Filtration Facility
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 0–46.4 ug/LReported levelSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–16.6 ug/LReported levelSystem-wide | None set | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 2.4 pCi/LReported levelBaseline Feeder | 5 pCi/LMCL | Within the limit |
+By source (3)— Baseline Feeder, Fluidized Bed Reactors (FBR), Wells
| |||
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.7 pCi/LReported levelIon Exchange Perchlorate Treatment | 15 pCi/LMCL | Within the limit |
+By source (5)— Ion Exchange Perchlorate Treatment, Baseline Feeder, Lytle Creek +2 more
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.8–3.2 pCi/LReported levelBaseline Feeder | 20 pCi/LMCL | Detected — no federal limit |
+By source (3)— Baseline Feeder, Fluidized Bed Reactors (FBR), Wells
| |||
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 0–0.51 ug/LReported levelIon Exchange Perchlorate Treatment | 5 ug/LMCL | Within the limit |
| TrichloroethyleneAn industrial solvent (TCE) used in metal degreasing. | 0–0.31 ug/LReported levelFluidized Bed Reactors (FBR) | 5 ug/LMCL | Within the limit |
| MTBE | 0–0.83 ug/LReported levelFluidized Bed Reactors (FBR) | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 0.58–3.1 ug/LReported levelBaseline Feeder | None set | Within the limit |
+By source (6)— Baseline Feeder, Ion Exchange Perchlorate Treatment, Wells +3 more
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 1 %Reported levelSystem-wide | None set | Detected — no federal limit |
+By source (6)— Baseline Feeder, Wells, Lytle Creek +3 more
| |||
Source: West Valley Water District — Rialto, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about West Valley Water District — Rialto, Ca, CA's water
+Is West Valley Water District — Rialto, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the West Valley Water District — Rialto, Ca, CA water utility lists 5 contaminants at or above the federal limit: Lead, Perfluorohexanesulfonic acid, PFOS, Turbidity, and PFOA. 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 West Valley Water District — Rialto, Ca, CA tap water?
37 contaminants were measured in West Valley Water District — Rialto, Ca, CA's 2023 Consumer Confidence Report, spanning physical & aggregate, metals, and pfas ("forever chemicals"). 14 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 West Valley Water District — Rialto, Ca, CA tap water?
5 contaminants in West Valley Water District — Rialto, Ca, CA's 2023 report sit at or above the federal limit: Lead (2.7× the limit); Perfluorohexanesulfonic acid (2.2× the limit); PFOS (2.1× the limit); Turbidity (1.8× the limit); PFOA (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 West Valley Water District — Rialto, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Lead, at 2.7× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from West Valley Water District — Rialto, Ca, CA's 2023 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 West Valley Water District — Rialto, Ca, CA'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 2023 report; a new report will replace it once the utility publishes its next annual update.
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