Serving roughly 76,443 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 SOUTH GATE-CITY, WATER DEPT.
1 water provider directly on file, serving roughly 76,443 people in Los Angeles County, California.
Quick answer: SOUTH GATE-CITY, WATER DEPT. has no violations on file. One reading is worth knowing about: Perfluoroctanoicacid (PFOA) was measured at 12NG/L, 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
PFPEA
PFHXS
PFOS
PFOA
PFHXA
PFBS
TTHM
Bromoform
Dibromochloromethane
Bromodichloromethane
Dibromoaceticacid
Chloroform
Copper, Free
Turbidity
Manganese
Trichloroethylene
Tetrachloroethylene
Aggressive Index
Magnesium
Calcium
Potassium
Sodium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluorononanoicacid (PFNA)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Utility SOUTH GATE-CITY, WATER DEPT.Population served 76,443Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Copper, Free
Detected: 170 UG/L (ppb)
4/14/2025
Manganese
Detected: 31 UG/L (ppb)
5/19/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 15 UG/L (ppb)
7/8/2025
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: 6.6 UG/L (ppb)
7/8/2025
Dibromochloromethane
Detected: 5.5 UG/L (ppb)
7/8/2025
Bromodichloromethane
Detected: 2 UG/L (ppb)
7/8/2025
Chloroform
Detected: 1.6 UG/L (ppb)
4/8/2025
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
Chloride
Detected: 26 MG/L (ppm)
7/16/2025
Sulfate
Detected: 47 MG/L (ppm)
7/16/2025
Fluoride
Detected: 0.38 MG/L (ppm)
7/16/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 2 MG/L (ppm)
8/13/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 12 MG/L (ppm)
7/16/2025
Calcium
Detected: 51.6 MG/L (ppm)
7/16/2025
Potassium
Detected: 2.6 MG/L (ppm)
7/16/2025
Sodium
Detected: 35 MG/L (ppm)
7/16/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 178 MG/L (ppm)
7/16/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFPEA
Detected: 0.0036 µg/L (ppb)
1/17/2024
PFHXS
Detected: 0.0043 µg/L (ppb)
1/17/2024
PFOS
Detected: 0.019 µg/L (ppb)
1/17/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFOA
Detected: 0.0075 µg/L (ppb)
1/17/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXA
Detected: 0.0032 µg/L (ppb)
1/17/2024
PFBS
Detected: 0.0035 µg/L (ppb)
9/13/2023
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Trichloroethylene
Detected: 0.61 UG/L (ppb)
8/27/2025
Tetrachloroethylene
Detected: 0.52 UG/L (ppb)
9/24/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 280 MG/L (ppm)
7/16/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 2 UG/L (ppb)
7/8/2025
Turbidity
Detected: 0.2 NTU
9/3/2025
A measure of water cloudiness from suspended particles.
Aggressive Index
Detected: 12 AGGR
7/16/2025
Alkalinity, Total
Detected: 230 MG/L (ppm)
7/16/2025
TDS
Detected: 330 MG/L (ppm)
7/16/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 4.4 NG/L (ppt)
9/10/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 3.3 NG/L (ppt)
9/10/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 5.4 NG/L (ppt)
9/10/2025
Perfluorononanoicacid (PFNA)
Detected: 2 NG/L (ppt)
9/10/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 26 NG/L (ppt)
9/10/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 12 NG/L (ppt)
9/10/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 6.8 NG/L (ppt)
9/10/2025
Perfluorobutanoicacid (PFBA)
Detected: 4.1 NG/L (ppt)
9/10/2025
Perfluoropentanoicacid (PFPEA)
Detected: 6.8 NG/L (ppt)
9/10/2025
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.