CAL-AM WATER COMPANY - DUARTE Water Quality Report
Serving roughly 24,773 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
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Results for CAL-AM WATER COMPANY - DUARTE
1 water provider directly on file, serving roughly 24,773 people in Los Angeles County, California.
Quick answer: CAL-AM WATER COMPANY - DUARTE has no violations on file and no single reading stands out against its peers (601 other providers in this area). It serves roughly 24,773 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
PFOS
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Dichloroaceticacid
Fluoride
Nitrate
Perfluoroctanoicacid (PFOA)
Barium
Utility CAL-AM WATER COMPANY - DUARTEPopulation served 24,773Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.001 mg/L (ppm)
12/31/2024
Barium
Detected: 100 UG/L (ppb)
5/20/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 8.5 UG/L (ppb)
7/29/2025
A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.
Chloroform
Detected: 1.6 UG/L (ppb)
7/29/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 2.6 UG/L (ppb)
7/29/2025
Bromodichloromethane
Detected: 1.9 UG/L (ppb)
7/29/2025
Dibromochloromethane
Detected: 3.2 UG/L (ppb)
7/29/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Fluoride
Detected: 0.42 MG/L (ppm)
5/20/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.94 MG/L (ppm)
5/20/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFOS
Detected: 0.0051 µg/L (ppb)
10/12/2023
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1.1 UG/L (ppb)
7/29/2025
Dichloroaceticacid
Detected: 1.1 UG/L (ppb)
4/28/2025
Perfluoroctanoicacid (PFOA)
Detected: 4.9 NG/L (ppt)
2/19/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.