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Cal/Am Water Company - San Marino

EPA monitoring tested this supplier for 112 contaminants and detected 27. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

112
contaminants tested
27
detected
47,995
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Private
Counties served
Los Angeles

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.

0
health-based violations
2
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2020-01-01 → 2020-03-06
MR Monitoring Resolved 2020-01-01 → 2020-03-06

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0053 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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
16600 µg/L 166%
of the EPA limit, in the worst sample — 10000 µg/L
 4372/4410 SYR4 2012–2019
Trichloroethylene
6.1 µg/L 122%
of the EPA limit, in the worst sample — 5 µg/L
 1222/1663 SYR4 2012–2019
Tetrachloroethylene
17 µg/L 340%
of the EPA limit, in the worst sample — 5 µg/L
 1179/1685 SYR4 2012–2019
Dibromochloromethane
17.2 µg/L
No EPA limit set
 285/810 SYR4 2012–2019
Bromodichloromethane
17.1 µg/L
No EPA limit set
 232/795 SYR4 2012–2019
Carbon Tetrachloride
1.1 µg/L 22%
of the EPA limit 5 µg/L
 232/1605 SYR4 2012–2019
Bromoform
8.2 µg/L
No EPA limit set
 203/832 SYR4 2012–2019
Chloroform
15.9 µg/L
No EPA limit set
 193/772 SYR4 2012–2019
TTHM
43 µg/L 54%
of the EPA limit 80 µg/L
 125/139 SYR4 2012–2019
Fluoride
1080 µg/L 27%
of the EPA limit 4000 µg/L
 123/123 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
29 µg/L 48%
of the EPA limit 60 µg/L
 59/124 SYR4 2012–2019
Dichloroacetic Acid
12 µg/L
No EPA limit set
 51/124 SYR4 2012–2019
Dibromoacetic Acid
4.8 µg/L
No EPA limit set
 50/124 SYR4 2012–2019
Nitrate-Nitrite
16000 µg/L 160%
of the EPA limit, in the worst sample — 10000 µg/L
 38/38 SYR4 2016–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 37/37 LCR 2023
Trichloroacetic Acid
13 µg/L
No EPA limit set
 32/124 SYR4 2012–2019
Combined Uranium
23.84 µg/L 79%
of the EPA limit 30 µg/L
 25/25 SYR4 2013–2019
Chromium
44 µg/L 44%
of the EPA limit 100 µg/L
 23/135 SYR4 2012–2019
Arsenic
2.9 µg/L 29%
of the EPA limit 10 µg/L
 15/123 SYR4 2012–2019
cis-1,2-Dichloroethylene
1.1 µg/L 1.6%
of the EPA limit 70 µg/L
 5/1604 SYR4 2012–2019
Lithium
91.9 µg/L
No EPA limit set
 4/16 UCMR-5 2025
1,2-Dichloropropane
2.9 µg/L 58%
of the EPA limit 5 µg/L
 3/1618 SYR4 2012–2019
Copper
160 µg/L 12%
of the EPA limit 1300 µg/L
 2/97 SYR4 2012–2019
Mercury
2.1 µg/L 105%
of the EPA limit, in the worst sample — 2 µg/L
 2/120 SYR4 2012–2019
Lead
1 µg/L 6.7%
of the EPA limit 15 µg/L
 1/97 SYR4 2012–2019
Monochloroacetic Acid
3 µg/L
No EPA limit set
 1/124 SYR4 2012–2019
85 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, TotalO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
NIETO, CHRISTOPHER
Phone
626-614-2509
Email
christopher.nieto@amwater.com

Frequently asked questions about Cal/Am Water Company - San Marino

Is Cal/Am Water Company - San Marino tap water safe to drink?

EPA monitoring detected 27 contaminants in Cal/Am Water Company - San Marino'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 - San Marino's water?

EPA monitoring detected Nitrate, Trichloroethylene, Tetrachloroethylene, Dibromochloromethane, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Cal/Am Water Company - San Marino serve?

Cal/Am Water Company - San Marino reports serving 47,995 people in California, per its EPA record.

Has Cal/Am Water Company - San Marino had any water quality violations?

The EPA has 2 violations on file for Cal/Am Water Company - San Marino, of which 0 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.