Drinking water quality · 2024
What's in Fontana, CA tap water
35 contaminants were measured in the Fontana, CA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 35
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Where your water comes from · EPA SDWIS
Fontana, CA's drinking water comes from ground water, drawn from 35 sources.
Source
- SWP RAW - COMBINED INFLUENT
- WELL F-54A
- WELL F-10D
- WELL F-21B
- + 31 more
Treatment
- F-23 IX TP
- WELL F-13A - TREATED
- WELL F-13B - TREATED
- + 27 more
Distribution
Also buys water from CUCAMONGA VALLEY WATER DISTRICT.
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.
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 46 ug/LAverageSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 14 ug/LAverageSystem-wide | None set | Within the limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0.1 ug/LAverageSystem-wide | 1 ug/LPublic health goal | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 3.32 mg/LAverageSystem-wide | 10 mg/LPublic health goal | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.2 mg/LAverageSystem-wide | 1 mg/LPublic health goal | Within the limit |
| ChlorideA naturally occurring salt compound. | 12.27 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 19.15 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0.97 mg/LAverageSystem-wide | 4 mg/LPublic health goal | Within the limit |
| Xylenes Total | 0.05 ug/LAverageSystem-wide | 1 ug/LPublic health goal | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 260 ug/L90th percentileAt the tap | 1300 ug/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 3.71 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| BoronA naturally occurring element from rock and soil. | 50 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 47.21 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.83 ug/LAverageSystem-wide | 0.02 ug/LPublic health goal | Detected — no federal limit |
| IronA naturally occurring metal common in groundwater. | 15.5 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 9.05 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 0.12 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 2.65 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 27 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.08 NTUAverageSystem-wide | 1 NTUMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 162 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| ColorA measure of visible tint in the water. | 0.04AverageSystem-wide | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 148.3 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 0.97AverageSystem-wide | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.89AverageSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 404.5AverageSystem-wide | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 0.94 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 219.5 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0.83 pCi/LAverageSystem-wide | 0 pCi/LPublic health goal | Within the limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Dichloromethane | 0.1 ug/LAverageSystem-wide | 4 ug/LPublic health goal | Within the limit |
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 0.02 ug/LAverageSystem-wide | 0.06 ug/LPublic health goal | Within the limit |
| Dichlorodifluoromethane | 0.12 ug/LAverageSystem-wide | None set | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0 %Highest single samplePercentage of Positive Samples Collected | 0 %Public health goal | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 2 %Highest single samplePercentage of Positive Samples Collected | 0 %Public health goal | Detected — no federal limit |
People also ask about Fontana, CA's water
+Is Fontana, CA tap water safe to drink in 2024?
Every one of the 35 contaminants measured in Fontana, CA's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Fontana, CA tap water?
35 contaminants were measured in Fontana, CA's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic 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.
+Where does the data on this page come from?
Every value is transcribed from Fontana, CA'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 Fontana, 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 2024 report; a new report will replace it once the utility publishes its next annual update.