CALIFORNIA WATER SERVICE CO. - DOMINGUEZ Water Quality Report
Serving roughly 143,996 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for CALIFORNIA WATER SERVICE CO. - DOMINGUEZ
1 water provider directly on file, serving roughly 143,996 people in Los Angeles County, California.
Quick answer: CALIFORNIA WATER SERVICE CO. - DOMINGUEZ has no violations on file. One reading is worth knowing about: Temperature (CENTIGRADE) was measured at 26.9C, among the highest of the 601 providers on file in this area. It's the most notable figure in this system's record among its 601 local peers.
Lead Summary
Lithium
PFHXS
Temperature (CENTIGRADE)
Fluoride
Nitrate
Turbidity
pH, Field
Odor
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Monochloroaceticacid
Color
Utility CALIFORNIA WATER SERVICE CO. - DOMINGUEZPopulation served 143,996Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0018 mg/L (ppm)
12/31/2023
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 10 UG/L (ppb)
8/6/2025
TTHM
Detected: 27 UG/L (ppb)
8/6/2025
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: 6.1 UG/L (ppb)
8/6/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 3.3 UG/L (ppb)
8/6/2025
Bromodichloromethane
Detected: 8 UG/L (ppb)
8/6/2025
Dibromochloromethane
Detected: 9.8 UG/L (ppb)
8/6/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Fluoride
Detected: 0.7 MG/L (ppm)
9/10/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.4 MG/L (ppm)
7/9/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
pH, Field
Detected: 6.52 PH
10/15/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 44.4 µg/L (ppb)
10/9/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFHXS
Detected: 0.0031 µg/L (ppb)
7/9/2024
Other
Additional substances tested that don't fit neatly into the categories above
Temperature (CENTIGRADE)
Detected: 26.9 C
10/22/2025
Turbidity
Detected: 0.35 NTU
10/15/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 2 TON
10/15/2025
Dichloroaceticacid
Detected: 4.5 UG/L (ppb)
8/6/2025
Trichloroaceticacid
Detected: 1.5 UG/L (ppb)
8/6/2025
Dibromoaceticacid
Detected: 2 UG/L (ppb)
8/6/2025
Monochloroaceticacid
Detected: 2.3 UG/L (ppb)
8/6/2025
Color
Detected: 10 UNITS
10/15/2025
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.