Compliance record
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFOS | 0.0051 µg/L | 1/16 | 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 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 | 5300 µg/L 53% of the EPA limit 10000 µg/L | 254/256 | SYR4 | 2012–2019 |
| TTHM | 36 µg/L 45% of the EPA limit 80 µg/L | 100/108 | SYR4 | 2012–2019 |
| Dibromochloromethane | 14 µg/L No EPA limit set | 92/113 | SYR4 | 2012–2019 |
| Bromoform | 14 µg/L No EPA limit set | 83/113 | SYR4 | 2012–2019 |
| Fluoride | 550 µg/L 14% of the EPA limit 4000 µg/L | 83/83 | SYR4 | 2013–2019 |
| Bromodichloromethane | 5.8 µg/L No EPA limit set | 69/113 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 6.8 µg/L 11% of the EPA limit 60 µg/L | 67/104 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 5.6 µg/L No EPA limit set | 66/104 | SYR4 | 2013–2019 |
| Barium | 210 µg/L 11% of the EPA limit 2000 µg/L | 57/83 | SYR4 | 2013–2019 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L | 39/39 | LCR | 2024 |
| Arsenic | 3.2 µg/L 32% of the EPA limit 10 µg/L | 34/83 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 950000 µg/L 9500% of the EPA limit, in the worst sample — 10000 µg/L | 26/26 | SYR4 | 2013–2019 |
| Chloroform | 2.1 µg/L No EPA limit set | 11/113 | SYR4 | 2012–2019 |
| Combined Uranium | 5.066 µg/L 17% of the EPA limit 30 µg/L | 10/16 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.2 µg/L No EPA limit set | 2/104 | SYR4 | 2013–2019 |
| Copper | 234 µg/L 18% of the EPA limit 1300 µg/L | 1/59 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 1.2 µg/L No EPA limit set | 1/104 | SYR4 | 2013–2019 |
94 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Cal-Am Water Company - Duarte
Is Cal-Am Water Company - Duarte tap water safe to drink?
EPA monitoring detected 18 contaminants in Cal-Am Water Company - Duarte'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 Cal-Am Water Company - Duarte's water?
EPA monitoring detected Nitrate, TTHM, Dibromochloromethane, Bromoform, Fluoride, and others. The full list with the level and data source for each is above.
How many people does Cal-Am Water Company - Duarte serve?
Cal-Am Water Company - Duarte reports serving 24,773 people in California, per its EPA record.
Has Cal-Am Water Company - Duarte had any water quality violations?
The EPA has no formal drinking-water violations on file for Cal-Am Water Company - Duarte.
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.