Compliance record
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 7800 µg/L 78% of the EPA limit 10000 µg/L
worst single sample: 14464 µg/L | 4826/4846 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 4.9 µg/L 98% of the EPA limit 5 µg/L
worst single sample: 7.6 µg/L | 540/1592 | SYR4 | 2012–2019 |
| Fluoride | 480 µg/L 12% of the EPA limit 4000 µg/L
worst single sample: 660 µg/L | 231/236 | SYR4 | 2012–2019 |
| TTHM | 61.3 µg/L 77% of the EPA limit 80 µg/L
worst single sample: 76 µg/L | 188/284 | SYR4 | 2012–2019 |
| Dibromochloromethane | 25 µg/L No EPA limit set
worst single sample: 29 µg/L | 157/283 | SYR4 | 2012–2019 |
| Bromodichloromethane | 18 µg/L No EPA limit set
worst single sample: 23 µg/L | 146/282 | SYR4 | 2012–2019 |
| Chloroform | 24 µg/L No EPA limit set
worst single sample: 36 µg/L | 135/282 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 21 µg/L 35% of the EPA limit 60 µg/L
worst single sample: 30 µg/L | 126/232 | SYR4 | 2012–2019 |
| Bromoform | 14.8 µg/L No EPA limit set
worst single sample: 25 µg/L | 123/283 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 874000 µg/L 8740% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L | 114/120 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 6.8 µg/L No EPA limit set
worst single sample: 7.7 µg/L | 107/232 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 9.7 µg/L No EPA limit set
worst single sample: 14 µg/L | 101/232 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 11.05 µg/L No EPA limit set
worst single sample: 14 µg/L | 80/232 | SYR4 | 2012–2019 |
| Arsenic | 6.01 µg/L 60% of the EPA limit 10 µg/L
worst single sample: 6.2 µg/L | 27/236 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 19/19 | LCR | 2024 |
| Dichloromethane | 10.92 µg/L 218% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 15 µg/L | 7/252 | SYR4 | 2012–2019 |
| Combined Uranium | 5.215 µg/L 17% of the EPA limit 30 µg/L | 5/5 | SYR4 | 2013–2019 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set | 4/232 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0129 µg/L 6.4% of the EPA limit 0.2000 µg/L
worst single sample: 0.0130 µg/L | 2/131 | SYR4 | 2012–2019 |
| Copper | 216.5 µg/L 17% of the EPA limit 1300 µg/L
worst single sample: 220 µg/L | 2/236 | SYR4 | 2012–2019 |
| Lead | 19 µg/L 127% of the EPA limit, at the 95th percentile of samples — 15 µg/L | 1/236 | SYR4 | 2012–2019 |
90 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
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Frequently asked questions about San Gabriel Valley Wc - Fontana
Is San Gabriel Valley Wc - Fontana tap water safe to drink?
EPA monitoring detected 21 contaminants in San Gabriel Valley Wc - Fontana's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in San Gabriel Valley Wc - Fontana's water?
EPA monitoring detected Nitrate, Tetrachloroethylene, Fluoride, TTHM, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does San Gabriel Valley Wc - Fontana serve?
San Gabriel Valley Wc - Fontana reports serving 237,700 people in California, per its EPA record.
Has San Gabriel Valley Wc - Fontana had any water quality violations?
The EPA has no formal drinking-water violations on file for San Gabriel Valley Wc - Fontana.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.