SIERRA MADRE-CITY, WATER DEPT. Water Quality Report
Serving roughly 11,000 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for SIERRA MADRE-CITY, WATER DEPT.
1 water provider directly on file, serving roughly 11,000 people in Los Angeles County, California.
Quick answer: SIERRA MADRE-CITY, WATER DEPT. has no violations on file and no single reading stands out against its peers (601 other providers in this area). It serves roughly 11,000 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Fluoride
Turbidity
Odor
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Nitrate
Trichloroethylene
Tetrachloroethylene
Carbon, Total
Utility SIERRA MADRE-CITY, WATER DEPT.Population served 11,000Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 2.3 UG/L (ppb)
8/5/2025
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: 1.2 UG/L (ppb)
8/5/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 1.4 UG/L (ppb)
5/6/2025
Bromodichloromethane
Detected: 1 UG/L (ppb)
8/5/2025
Dibromochloromethane
Detected: 1.3 UG/L (ppb)
8/5/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Fluoride
Detected: 0.7 MG/L (ppm)
8/5/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 1.3 MG/L (ppm)
8/5/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Trichloroethylene
Detected: 0.52 UG/L (ppb)
10/15/2025
Tetrachloroethylene
Detected: 1.2 UG/L (ppb)
10/15/2025
Other
Additional substances tested that don't fit neatly into the categories above
Turbidity
Detected: 0.34 NTU
10/21/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
10/21/2025
Carbon, Total
Detected: 0.55 MG/L (ppm)
10/7/2025
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.