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 | 8200 µg/L 82% of the EPA limit 10000 µg/L
worst single sample: 10000 µg/L | 1600/1612 | SYR4 | 2012–2019 |
| Trichloroethylene | 79.3 µg/L 1586% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 120 µg/L | 239/1134 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 4.24 µg/L 85% of the EPA limit 5 µg/L
worst single sample: 6.3 µg/L | 193/1134 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 4 µg/L 80% of the EPA limit 5 µg/L
worst single sample: 6.3 µg/L | 135/1135 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 2.91 µg/L 58% of the EPA limit 5 µg/L
worst single sample: 3.6 µg/L | 119/1135 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 1.73 µg/L 2.5% of the EPA limit 70 µg/L
worst single sample: 2.1 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 | 529.5 µg/L 13% of the EPA limit 4000 µg/L
worst single sample: 580 µg/L | 28/28 | SYR4 | 2012–2019 |
| Dibromochloromethane | 11.3 µg/L No EPA limit set
worst single sample: 17 µg/L | 16/901 | SYR4 | 2012–2019 |
| Combined Uranium | 3.3227 µg/L 11% of the EPA limit 30 µg/L
worst single sample: 3.427 µg/L | 15/15 | SYR4 | 2012–2019 |
| TTHM | 41.9 µg/L 52% of the EPA limit 80 µg/L
worst single sample: 58 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 | 5.105 µg/L No EPA limit set
worst single sample: 5.3 µg/L | 14/901 | SYR4 | 2012–2019 |
| Bromodichloromethane | 13.6 µg/L No EPA limit set
worst single sample: 18 µg/L | 12/901 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 3.04 µg/L No EPA limit set
worst single sample: 3.4 µg/L | 10/16 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 19.3 µg/L 32% of the EPA limit 60 µg/L
worst single sample: 22 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 | 18.25 µg/L No EPA limit set
worst single sample: 20 µg/L | 6/901 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 8125 µg/L 81% of the EPA limit 10000 µg/L
worst single sample: 8200 µg/L | 6/6 | SYR4 | 2016–2019 |
| Nitrite | 7850 µg/L 785% of the EPA limit, at the 95th percentile of samples — 1000 µg/L
worst single sample: 8100 µg/L | 3/630 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 11.815 µg/L No EPA limit set
worst single sample: 12 µg/L | 2/16 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 6.33 µg/L No EPA limit set
worst single sample: 6.4 µg/L | 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.