SOUTH GATE is served by 2 water providers on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for SOUTH GATE, CA
2 water providers on file serving this city.
Quick answer: SOUTH GATE's water has no violations on file and no single reading stands out against its peers (2 other providers in this area). It serves roughly 76,443 people, and the full breakdown below reflects everything EPA and California have on record for it.
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)
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Nitrate-Nitrite
Radium-228
Combined Uranium
Totalradiumforntncper§64442(B) (3)
pH
Odor
Boron, Total
Chromium, Hex
Barium
Conductivity (at 25°C)
Contaminants found
Metals
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.
Combined Uranium
Detected: 2.3 PCI/L
9/18/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Chromium, Hex
Detected: 0.73 UG/L (ppb)
7/23/2025
Barium
Detected: 110 UG/L (ppb)
7/23/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 15 UG/L (ppb)
Found at 2 providers
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: 4.2 UG/L (ppb)
Found at 2 providers
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: 86 MG/L (ppm)
Found at 2 providers
Sulfate
Detected: 110 MG/L (ppm)
Found at 2 providers
Fluoride
Detected: 0.38 MG/L (ppm)
Found at 2 providers
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 3.5 MG/L (ppm)
Found at 2 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 3.5 MG/L (ppm)
7/23/2025
Boron, Total
Detected: 160 UG/L (ppb)
7/23/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 17 MG/L (ppm)
Found at 2 providers
Calcium
Detected: 91 MG/L (ppm)
Found at 2 providers
Potassium
Detected: 4 MG/L (ppm)
Found at 2 providers
Sodium
Detected: 52 MG/L (ppm)
Found at 2 providers
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 300 MG/L (ppm)
Found at 2 providers
Langelier Index (pH(s))
Detected: 1.12 LANG
7/23/2025
pH
Detected: 7.7 PH
7/23/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
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)
Found at 2 providers
Tetrachloroethylene
Detected: 1.8 UG/L (ppb)
Found at 2 providers
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 280 MG/L (ppm)
Found at 2 providers
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 2 UG/L (ppb)
7/8/2025
Turbidity
Detected: 0.22 NTU
Found at 2 providers
A measure of water cloudiness from suspended particles.
Aggressive Index
Detected: 12.34 AGGR
Found at 2 providers
Alkalinity, Total
Detected: 230 MG/L (ppm)
Found at 2 providers
TDS
Detected: 500 MG/L (ppm)
Found at 2 providers
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
Langelier Index (Source Temp.)
Detected: 0.51 LANG
7/23/2025
Radium-228
Detected: 0.278 PCI/L
4/22/2025
Totalradiumforntncper§64442(B) (3)
Detected: 0.4 PCI/L
1/14/2025
Odor
Detected: 1 TON
7/23/2025
Conductivity (at 25°C)
Detected: 580 UMHO/CM
7/23/2025
Filtration considerations: General system types, not a specific product recommendation.