Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
6
health-based violations
7
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2019-06-01 → 2019-06-30 |
| TT | Health-based | Resolved | 2019-06-01 → 2019-06-30 |
| TT | Health-based | Resolved | 2018-09-01 → 2018-09-30 |
| TT | Health-based | Resolved | 2018-09-01 → 2018-09-30 |
| MCL | Health-based | Resolved | 1995-12-01 → 1995-12-31 |
| MCL | Health-based | Resolved | 1995-12-01 → 1995-12-31 |
| Other | Monitoring | Archived | 1987-08-01 → 1987-08-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
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 | 11752 µg/L 118% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 22000 µg/L | 8778/8888 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 110 µg/L 2200% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 220 µg/L | 5306/15490 | SYR4 | 2012–2019 |
| Trichloroethylene | 61 µg/L 1220% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 140 µg/L | 3970/13986 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 12 µg/L 171% of the EPA limit, at the 95th percentile of samples — 7 µg/L
worst single sample: 64 µg/L | 2596/13019 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 7.83 µg/L 157% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 17 µg/L | 2495/12174 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 3.8 µg/L 5.4% of the EPA limit 70 µg/L
worst single sample: 6.1 µg/L | 2193/13052 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 2.3 µg/L 46% of the EPA limit 5 µg/L
worst single sample: 3.7 µg/L | 1933/12122 | SYR4 | 2012–2019 |
| Chloroform | 1.8 µg/L No EPA limit set
worst single sample: 4.8 µg/L | 1159/9854 | SYR4 | 2012–2019 |
| TTHM | 10 µg/L 13% of the EPA limit 80 µg/L
worst single sample: 15 µg/L | 278/3485 | SYR4 | 2012–2019 |
| Bromoform | 4.6 µg/L No EPA limit set
worst single sample: 6.9 µg/L | 176/9883 | SYR4 | 2012–2019 |
| Fluoride | 697 µg/L 17% of the EPA limit 4000 µg/L
worst single sample: 910 µg/L | 167/167 | SYR4 | 2012–2019 |
| Dibromochloromethane | 4.43 µg/L No EPA limit set
worst single sample: 6.2 µg/L | 155/9906 | SYR4 | 2012–2019 |
| Bromodichloromethane | 2.4 µg/L No EPA limit set
worst single sample: 3.7 µg/L | 62/9883 | SYR4 | 2012–2019 |
| Arsenic | 3.005 µg/L 30% of the EPA limit 10 µg/L
worst single sample: 3.8 µg/L | 60/98 | SYR4 | 2012–2019 |
| Combined Uranium | 13.7378 µg/L 46% of the EPA limit 30 µg/L
worst single sample: 14.9 µg/L | 48/50 | SYR4 | 2012–2019 |
| Barium | 207 µg/L 10% of the EPA limit 2000 µg/L
worst single sample: 220 µg/L | 44/98 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 42/42 | LCR | 2023 |
| Dibromoacetic Acid | 1.91 µg/L No EPA limit set
worst single sample: 2.5 µg/L | 39/154 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 1.91 µg/L 3.2% of the EPA limit 60 µg/L
worst single sample: 5.5 µg/L | 39/154 | SYR4 | 2012–2019 |
| trans-1,2-Dichloroethylene | 5.325 µg/L 5.3% of the EPA limit 100 µg/L
worst single sample: 23 µg/L | 26/12014 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 235060 µg/L 2351% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 580000 µg/L | 13/13 | SYR4 | 2014–2019 |
| 1,1,2-Trichloroethane | 3.775 µg/L 76% of the EPA limit 5 µg/L
worst single sample: 3.8 µg/L | 6/12008 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 5.645 pCi/L No EPA limit set
worst single sample: 5.8 pCi/L | 2/2 | SYR4 | 2017–2018 |
| Pentachlorophenol | 0.8470 µg/L 85% of the EPA limit 1 µg/L
worst single sample: 0.8500 µg/L | 2/69 | SYR4 | 2013–2019 |
| Monochloroacetic Acid | 3 µg/L No EPA limit set | 1/154 | SYR4 | 2012–2019 |
| Nitrite | 0.4700 µg/L 0% of the EPA limit 1000 µg/L | 1/98 | SYR4 | 2012–2019 |
| Selenium | 5 µg/L 10% of the EPA limit 50 µg/L | 1/98 | SYR4 | 2012–2019 |
| Toluene | 0.5200 µg/L 0.1% of the EPA limit 1000 µg/L | 1/12016 | SYR4 | 2012–2019 |
82 contaminants tested, none detected
1,1,1-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPicloramSimazineStyreneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidVinyl ChlorideXylenes, TotalLithiumO-DichlorobenzeneP-Dichlorobenzene
Utility contact
Frequently asked questions about San Gabriel Valley Water Co.-El Monte
Is San Gabriel Valley Water Co.-El Monte tap water safe to drink?
EPA monitoring detected 30 contaminants in San Gabriel Valley Water Co.-El Monte'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 Water Co.-El Monte's water?
EPA monitoring detected Nitrate, Tetrachloroethylene, Trichloroethylene, 1,1-Dichloroethylene, Carbon Tetrachloride, and others. The full list with the level and data source for each is above.
How many people does San Gabriel Valley Water Co.-El Monte serve?
San Gabriel Valley Water Co.-El Monte reports serving 248,000 people in California, per its EPA record.
Has San Gabriel Valley Water Co.-El Monte had any water quality violations?
The EPA has 7 violations on file for San Gabriel Valley Water Co.-El Monte, of which 6 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.