Serving roughly 51,361 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for CITY OF ARCADIA
1 water provider directly on file, serving roughly 51,361 people in Los Angeles County, California.
Quick answer: CITY OF ARCADIA has no violations on file and no single reading stands out against its peers (601 other providers in this area). It serves roughly 51,361 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
PFOS
PFHXS
Lead
TTHM
Bromoform
Bromodichloromethane
Dibromochloromethane
Chloroform
Dibromoaceticacid
Dichloroaceticacid
Copper, Free
Nitrate
Utility CITY OF ARCADIAPopulation served 51,361Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0019 mg/L (ppm)
12/31/2025
Lead
Detected: 1.2 UG/L (ppb)
9/16/2025
A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.
Copper, Free
Detected: 64 UG/L (ppb)
9/16/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 7.2 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.
Bromoform
Detected: 2.3 UG/L (ppb)
7/29/2025
Bromodichloromethane
Detected: 1.5 UG/L (ppb)
7/29/2025
Dibromochloromethane
Detected: 2.8 UG/L (ppb)
7/29/2025
Chloroform
Detected: 1.2 UG/L (ppb)
7/29/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 1.5 MG/L (ppm)
10/28/2025
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: 0.01 µg/L (ppb)
2/16/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXS
Detected: 0.0048 µg/L (ppb)
11/27/2023
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1 UG/L (ppb)
7/29/2025
Dichloroaceticacid
Detected: 1.1 UG/L (ppb)
4/28/2025
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.