Drinking water quality · 2023
· Verified
What's in San Gabriel Valley Wc - Fontana, CA tap water
105 contaminants were measured in the San Gabriel Valley Wc - Fontana, CA water system's 2023 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 105
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- Iron
- Service area
- CA
2.2× the limit
state-level CCR
Where your water comes from · EPA SDWIS
San Gabriel Valley Wc - Fontana, CA's drinking water comes from ground water, drawn from 35 sources.
Source
35ground water
- SWP RAW - COMBINED INFLUENT
- WELL F-54A
- WELL F-10D
- WELL F-21B
- + 31 more
Treatment
30treatment plants
- F-23 IX TP
- WELL F-13A - TREATED
- WELL F-13B - TREATED
- + 27 more
Distribution
2storage units
Also buys water from CUCAMONGA VALLEY WATER DISTRICT.
Source: EPA SDWIS facilities inventory. Methodology.
Historical readings · EPA Six-Year Review (2012–2019)
4 contaminants historically over EPA limits in San Gabriel Valley Wc - Fontana, CA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
DICHLOROMETHANE worst: 2018 | 0.015 mg/L 3.0× | 0.005 mg/L | '14'17'18 |
PCE worst: 2017 | 0.0076 mg/L 1.5× | 0.005 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE worst: 2012 | 14.5 mg/L 1.4× | 10 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2016 | 13 mg/L 1.3× | 10 mg/L | '16'17'18'19 |
TTHM worst: 2016 | 0.076 mg/L 95% | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
ARSENIC worst: 2015 | 0.0062 mg/L within below national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2019 | 0.03 mg/L within | 0.06 mg/L | '12'13'14'16'17'18'19 |
FLUORIDE worst: 2015 | 0.66 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
DBCP worst: 2015 | 0.000013 mg/L within below national p90 | 0.0002 mg/L | '15'16 |
URANIUM worst: 2019 | 0.00522 ug/L within below national p90 | 30 ug/L | '13'18'19 |
COPPER worst: 2014 | 0.15 mg/L below national p90 | — | '14'17 |
LEAD worst: 2017 | 0.019 mg/L | — | '17 |
DBAA worst: 2012 | 0.0037 mg/L | — | '12'13'14'16'17'18'19 |
DCAA worst: 2012 | 0.0011 mg/L | — | '12'13'14'16'17'18'19 |
MBAA worst: 2014 | 0.0011 mg/L | — | '14'16 |
TCAA worst: 2013 | 0.0015 mg/L | — | '13'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0065 mg/L | — | '12'13'14'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0085 mg/L | — | '12'13'14'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0035 mg/L | — | '12'13'14'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.01 mg/L | — | '12'13'14'16'17'18'19 |
PWSID CA3610041 · Source: EPA Six-Year Review 4 (2012–2019). Values are the highest detection in each calendar year; non-detect years are omitted. Year tags above show every year with a detection.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| IronA naturally occurring metal common in groundwater. | 657.5 UG/LAverageOther | 300 UG/LMCL | At or above the limit |
| ManganeseA naturally occurring metal from soil and rock. | 39 UG/LAverageOther | 50 UG/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 562.5 UG/LAverageOther | 1000 UG/LMCL | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 24.744999999999997 UG/LAverageSource water | 1000 UG/LMCL | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 0.328 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| Antimony | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleSource water | 4 UG/LMCL | None detected |
| Cadmium | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected UG/LHighest single sampleEntry point | 2 UG/LMCL | None detected |
| NickelA metal from natural deposits and industrial discharge. | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Thallium | Not detected UG/LHighest single sampleEntry point | 2 UG/LMCL | None detected |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | Not detected UG/LHighest single sampleEntry point | 5000 UG/LMCL | None detected |
| BoronA naturally occurring element from rock and soil. | 42.578947368421055 UG/LAverageSource water | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 25.381395348837213 MG/LAverageSource water | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.5447619047619048 UG/LAverageSource water | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 7.4704999999999995 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 2.19 MG/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 15.665000000000001 MG/LAverageSource water | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 10.715 NTUAverageOther | 5 NTUMCL | At or above the limit |
| ColorA measure of visible tint in the water. | 3.85 UNITSAverageSource water | 15 UNITSMCL | Within the limit |
| OdorA measure of detectable smell in the water. | 0.75 TONAverageOther | 3 TONMCL | Within the limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 384 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | Within the limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 231 MG/LAverageSource water | 1000 MG/LMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 109.03030303030303 MG/LAverageSource water | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 156.29999999999998 MG/LAverageSource water | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 8 PHAverageOther | None set | Detected — no federal limit |
| TemperatureThe measured temperature of the water sample. | 15.571428571428571 CAverageSource water | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 2.8600000000000003 UG/LAverageOther | 6 UG/LMCL | Within the limit |
| N-Nitrosodi-n-butylamine | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| NDMA | Not detected UG/LHighest single sampleEntry point | None set | None detected |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.92 PCI/LAverageOther | 15 PCI/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected PCI/LHighest single sampleEntry point | 5 PCI/LMCL | None detected |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Diquat | 4.2 UG/LAverageOther | 20 UG/LMCL | Within the limit |
| Chromium | 1.705 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| Carbofuran | Not detected UG/LHighest single sampleEntry point | 18 UG/LMCL | None detected |
| Carbon Tetrachloride | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Chlordane | Not detected UG/LHighest single sampleOther | 0.1 UG/LMCL | None detected |
| Chlorobenzene | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Cis Dichloroethylene 12 | Not detected UG/LHighest single sampleOther | 6 UG/LMCL | None detected |
| Deha | Not detected UG/LHighest single sampleEntry point | 400 UG/LMCL | None detected |
| Dehp | Not detected UG/LHighest single sampleSource water | 4 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Dichloroethylene 11 | Not detected UG/LHighest single sampleOther | 6 UG/LMCL | None detected |
| Dichloropropane 12 | Not detected UG/LHighest single sampleOther | 5 UG/LMCL | None detected |
| Dinoseb | Not detected UG/LHighest single sampleEntry point | 7 UG/LMCL | None detected |
| Edb | Not detected UG/LHighest single sampleEntry point | 0.05 UG/LMCL | None detected |
| Endothall | Not detected UG/LHighest single sampleEntry point | 100 UG/LMCL | None detected |
| Endrin | Not detected UG/LHighest single sampleSource water | 2 UG/LMCL | None detected |
| Glyphosate | Not detected UG/LHighest single sampleEntry point | 700 UG/LMCL | None detected |
| Heptachlor | Not detected UG/LHighest single sampleOther | 0.01 UG/LMCL | None detected |
| Heptachlor Epoxide | Not detected UG/LHighest single sampleSource water | 0.01 UG/LMCL | None detected |
| Hexachlorobenzene | Not detected UG/LHighest single sampleOther | 1 UG/LMCL | None detected |
| Hexachlorocyclopentadiene | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| Mcaa | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| Methoxychlor | Not detected UG/LHighest single sampleSource water | 30 UG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 600 UG/LMCL | None detected |
| Oxamyl | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleOther | 5 UG/LMCL | None detected |
| Pcb Total | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Pentachlorophenol | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Picloram | Not detected UG/LHighest single sampleEntry point | 500 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleOther | 100 UG/LMCL | None detected |
| Tce | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Toxaphene | Not detected UG/LHighest single sampleEntry point | 3 UG/LMCL | None detected |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleEntry point | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleEntry point | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Twofourd | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleOther | 0.5 UG/LMCL | None detected |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 21.263157894736842 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 13.2 MG/LAverageOther | 500 MG/LMCL | Within the limit |
| Asbestos | Not detected MFLHighest single sampleSource water | 7 MFLMCL | None detected |
| Cyanide | Not detected UG/LHighest single sampleOther | 150 UG/LMCL | None detected |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected MG/LHighest single sampleSource water | 1 MG/LMCL | None detected |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | Not detected UG/LHighest single sampleSource water | 0.005 UG/LMCL | None detected |
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzene | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzo(a)pyrene | Not detected UG/LHighest single sampleEntry point | 0.2 UG/LMCL | None detected |
| ChloroethaneA volatile organic compound used in some industrial processes. | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| Chloromethane | Not detected UG/LHighest single sampleOther | None set | None detected |
| Dalapon | Not detected UG/LHighest single sampleOther | 200 UG/LMCL | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleOther | 300 UG/LMCL | None detected |
| Simazine | Not detected UG/LHighest single sampleOther | 4 UG/LMCL | None detected |
| Toluene | Not detected UG/LHighest single sampleOther | 150 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleEntry point | 1750 UG/LMCL | None detected |
| Dichlorodifluoromethane | 0.5056043956043956 UG/LAverageEntry point | None set | Detected — no federal limit |
Source: San Gabriel Valley Wc - Fontana, 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 San Gabriel Valley Wc - Fontana, CA's water
+Is San Gabriel Valley Wc - Fontana, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the San Gabriel Valley Wc - Fontana, CA water utility lists 2 contaminants at or above the federal limit: Iron and Turbidity. 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 San Gabriel Valley Wc - Fontana, CA tap water?
105 contaminants were measured in San Gabriel Valley Wc - Fontana, CA's 2023 Consumer Confidence Report, spanning other, metals, and vocs & pesticides. 80 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 San Gabriel Valley Wc - Fontana, CA tap water?
2 contaminants in San Gabriel Valley Wc - Fontana, CA's 2023 report sit at or above the federal limit: Iron (2.2× the limit); Turbidity (2.1× 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 San Gabriel Valley Wc - Fontana, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Iron, at 2.2× 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 San Gabriel Valley Wc - Fontana, 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 San Gabriel Valley Wc - 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 2023 report; a new report will replace it once the utility publishes its next annual update.
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