CALIFORNIA WATER SERVICE CO. - ELA Water Quality Report
Serving roughly 152,474 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. - ELA
1 water provider directly on file, serving roughly 152,474 people in Los Angeles County, California.
Quick answer: CALIFORNIA WATER SERVICE CO. - ELA has no violations on file and no single reading stands out against its peers (601 other providers in this area). It serves roughly 152,474 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
PFOS
PFPEA
PFBS
PFHXA
PFBA
Dichlorodifluoromethane
1, 1-Dichloroethylene
Trichloroethylene
Aggressive Index
Langelier Index (pH(s))
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Fluoride
Nitrate
Nitrate-Nitrite
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorononanoicacid (PFNA)
Utility CALIFORNIA WATER SERVICE CO. - ELAPopulation served 152,474Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 58 MG/L (ppm)
6/18/2025
Sulfate
Detected: 83 MG/L (ppm)
6/18/2025
Fluoride
Detected: 0.3 MG/L (ppm)
9/23/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 4 MG/L (ppm)
8/20/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 0.83 MG/L (ppm)
6/18/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 18 MG/L (ppm)
9/23/2025
Potassium
Detected: 2.7 MG/L (ppm)
9/23/2025
Sodium
Detected: 62 MG/L (ppm)
9/23/2025
Calcium
Detected: 63 MG/L (ppm)
9/23/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -0.85 LANG
6/18/2025
Hardness, Total (ASCACO3)
Detected: 170 MG/L (ppm)
6/18/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 28.9 µg/L (ppb)
10/15/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFOS
Detected: 0.0086 µg/L (ppb)
7/22/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFPEA
Detected: 0.0035 µg/L (ppb)
7/16/2025
PFBS
Detected: 0.0041 µg/L (ppb)
7/15/2025
PFHXA
Detected: 0.0036 µg/L (ppb)
7/16/2025
PFBA
Detected: 0.007 µg/L (ppb)
7/15/2025
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Dichlorodifluoromethane
Detected: 0.5 UG/L (ppb)
7/22/2025
1, 1-Dichloroethylene
Detected: 1.8 UG/L (ppb)
9/10/2025
Trichloroethylene
Detected: 1 UG/L (ppb)
9/10/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 140 MG/L (ppm)
6/18/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.1 AGGR
6/18/2025
Alkalinity, Total
Detected: 140 MG/L (ppm)
6/18/2025
TDS
Detected: 370 MG/L (ppm)
6/18/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 5.1 NG/L (ppt)
10/14/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 13 NG/L (ppt)
10/14/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 3.1 NG/L (ppt)
10/14/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanoicacid (PFBA)
Detected: 2 NG/L (ppt)
10/14/2025
Perfluoropentanoicacid (PFPEA)
Detected: 2.8 NG/L (ppt)
10/14/2025
Perfluorohexanoicacid (PFHXA)
Detected: 3.1 NG/L (ppt)
10/14/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 8.3 NG/L (ppt)
9/23/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2 NG/L (ppt)
10/14/2025
Perfluorononanoicacid (PFNA)
Detected: 3.9 NG/L (ppt)
9/23/2025
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.