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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 10000 µg/L 100% of the EPA limit 10000 µg/L | 1600/1612 | SYR4 | 2012–2019 |
| Trichloroethylene | 120 µg/L 2400% of the EPA limit, in the worst sample — 5 µg/L | 239/1134 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 6.3 µg/L 126% of the EPA limit, in the worst sample — 5 µg/L | 193/1134 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 6.3 µg/L 126% of the EPA limit, in the worst sample — 5 µg/L | 135/1135 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 3.6 µg/L 72% of the EPA limit 5 µg/L | 119/1135 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 2.1 µg/L 3% of the EPA limit 70 µg/L | 95/1135 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 34/34 | LCR | 2028 |
| Fluoride | 580 µg/L 14% of the EPA limit 4000 µg/L | 28/28 | SYR4 | 2012–2019 |
| Dibromochloromethane | 17 µg/L No EPA limit set | 16/901 | SYR4 | 2012–2019 |
| Combined Uranium | 3.427 µg/L 11% of the EPA limit 30 µg/L | 15/15 | SYR4 | 2012–2019 |
| TTHM | 58 µg/L 73% of the EPA limit 80 µg/L | 15/32 | SYR4 | 2012–2019 |
| Barium | 120 µg/L 6% of the EPA limit 2000 µg/L | 14/23 | SYR4 | 2012–2019 |
| Bromoform | 5.3 µg/L No EPA limit set | 14/901 | SYR4 | 2012–2019 |
| Bromodichloromethane | 18 µg/L No EPA limit set | 12/901 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 3.4 µg/L No EPA limit set | 10/16 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 22 µg/L 37% of the EPA limit 60 µg/L | 10/16 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 3.1 pCi/L No EPA limit set | 7/14 | SYR4 | 2012–2019 |
| Chloroform | 20 µg/L No EPA limit set | 6/901 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 8200 µg/L 82% of the EPA limit 10000 µg/L | 6/6 | SYR4 | 2016–2019 |
| Nitrite | 8100 µg/L 810% of the EPA limit, in the worst sample — 1000 µg/L | 3/630 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 12 µg/L No EPA limit set | 2/16 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 6.4 µg/L No EPA limit set | 2/16 | SYR4 | 2012–2019 |
| Dichloromethane | 0.7400 µg/L 15% of the EPA limit 5 µg/L | 1/1133 | SYR4 | 2012–2019 |
88 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, TotalLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
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Frequently asked questions about La Puente Valley Cwd
Is La Puente Valley Cwd tap water safe to drink?
EPA monitoring detected 23 contaminants in La Puente Valley Cwd'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 La Puente Valley Cwd's water?
EPA monitoring detected Nitrate, Trichloroethylene, Tetrachloroethylene, Carbon Tetrachloride, 1,2-Dichloroethane, and others. The full list with the level and data source for each is above.
How many people does La Puente Valley Cwd serve?
La Puente Valley Cwd reports serving 8,243 people in California, per its EPA record.
Has La Puente Valley Cwd had any water quality violations?
The EPA has no formal drinking-water violations on file for La Puente Valley Cwd.
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.