Drinking water quality · 2023

· Verified

What's in Torrance-city, Water Dept., CA tap water

123 contaminants were measured in the Torrance-city, Water Dept., CA water system's 2023 annual report. Each is shown below against its federal limit 4 sit at or above that limit.

Reporting year
2023
Contaminants measured
123
Over federal limit
4
Approaching the limit
0
Worst contaminant
Manganese
2.7× the limit
Service area
CA
state-level CCR
Source
Utility CCR

PFAS — EPA UCMR5 (2023–2025)

1 PFAS compound detected in Torrance-city, Water Dept., CA

About this data

The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.

Lithium

● Detected (no federal limit)
Measured 58 mg/LSample year 2023Samples 3 detect / 8

near national p90 (76.59999999999991 mg/L across detecting U.S. systems)

PWSID CA1910213 · Source: EPA UCMR5. Limits per EPA's April 2024 PFAS National Primary Drinking Water Regulation. PFAS values reported in nanograms per liter (ng/L) — note that 1 ng/L = 1 part per trillion.

Where your water comes from · EPA SDWIS

Torrance-city, Water Dept., CA's drinking water comes from ground water, drawn from 5 sources.

Source

5ground water
  • WELL · 3
  • DELTHORNE PARK WELL
  • CITY YARD WELL

Treatment

3treatment plants
  • COMBINED RO EFFLUENT AFTER BLENDING
  • COMBINED RO EFFLUENT PRIOR TO BLENDING
  • N. TORRANCE WELL FIELD TREATMENT PLANT

Distribution

0storage units

Also buys water from METROPOLITAN WATER DIST. OF SO. CAL..

Historical readings · EPA Six-Year Review (2012–2019)

11 historically-detected contaminants in Torrance-city, Water Dept., CA

About this data

Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.

ContaminantWorst detectionEPA limitYears (2012–2019)
TTHM
worst: 2015
0.0778 mg/L
97%
0.08 mg/L
'12'13'14'15'16'17'18'19
HAA5
worst: 2017
0.0244 mg/L
within
0.06 mg/L
'12'13'14'15'16'17'18'19
DBAA
worst: 2012
0.0085 mg/L
'12'13'14'15'16'17'18'19
DCAA
worst: 2012
0.0081 mg/L
'12'13'14'15'16'17'18'19
MBAA
worst: 2012
0.0024 mg/L
'12'13'17
MCAA
worst: 2012
0.0057 mg/L
'12'15
TCAA
worst: 2012
0.0061 mg/L
'12'13'14'15'16'17'18'19
BROMODICHLOROMETHANE
worst: 2012
0.02 mg/L
'12'13'14'15'16'17'18'19
BROMOFORM
worst: 2012
0.042 mg/L
'12'13'14'15'16'17'18'19
CHLOROFORM
worst: 2012
0.015 mg/L
'12'13'14'15'16'17'18'19
DIBROMOCHLOROMETHANE
worst: 2012
0.025 mg/L
'12'13'14'15'16'17'18'19
PWSID CA1910213 · Source: EPA Six-Year Review 4 (2012–2019). Values are the highest detection in each calendar year; non-detect years are omitted. Year tags above show every year with a detection.

Metals

ContaminantMeasuredStatus
ManganeseA naturally occurring metal from soil and rock.137.42105263157896 UG/LAverageSource waterAt or above the limit
BariumA metal from erosion of natural deposits and industrial discharge.119 UG/LAverageSource waterWithin the limit
IronA naturally occurring metal common in groundwater.17 UG/LAverageSource waterWithin the limit
SeleniumA trace element from natural deposits and industrial discharge.0.6733333333333333 UG/LAverageSource waterWithin the limit
CopperA metal that enters water from corroding household plumbing.0.7333333333333334 UG/LAverageSource waterWithin the limit
AluminumA common element sometimes used as a treatment coagulant.Not detected UG/LHighest single sampleSource waterNone detected
AntimonyNot detected UG/LHighest single sampleSource waterNone detected
ArsenicA naturally occurring element that also enters water from industry and agriculture.Not detected UG/LHighest single sampleSource waterNone detected
BerylliumNot detected UG/LHighest single sampleSource waterNone detected
CadmiumNot detected UG/LHighest single sampleSource waterNone detected
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.Not detected UG/LHighest single sampleSource waterNone detected
MercuryA toxic metal from erosion of natural deposits and industrial runoff.Not detected UG/LHighest single sampleSource waterNone detected
NickelA metal from natural deposits and industrial discharge.Not detected UG/LHighest single sampleSource waterNone detected
ThalliumNot detected UG/LHighest single sampleSource waterNone detected
ZincA naturally occurring metal that can also enter water from corroding pipes.Not detected UG/LHighest single sampleSource waterNone detected
CalciumA naturally occurring mineral that contributes to water hardness.124.83076923076922 MG/LAverageSource waterDetected — no federal limit
Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium.0.0205 UG/LAverageSource waterDetected — no federal limit
MagnesiumA naturally occurring mineral that contributes to water hardness.50.33 MG/LAverageSource waterDetected — no federal limit
PotassiumA naturally occurring mineral from rock and soil.7.466666666666666 MG/LAverageSource waterDetected — no federal limit
SodiumA naturally occurring salt component.77.33333333333333 MG/LAverageSource waterDetected — no federal limit

Physical & aggregate

ContaminantMeasuredStatus
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.2269.468085106383 MG/LAverageSource waterAt or above the limit
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.2990 UMHO/CMAverageSource waterAt or above the limit
ColorA measure of visible tint in the water.2.3333333333333335 UNITSAverageSource waterWithin the limit
TurbidityA measure of cloudiness from suspended particles in the water.0.11666666666666665 NTUAverageSource waterWithin the limit
OdorA measure of detectable smell in the water.Not detected TONHighest single sampleSource waterNone detected
AlkalinityA measure of the water's capacity to neutralize acids.149.72222222222223 MG/LAverageSource waterDetected — no federal limit
HardnessA measure of dissolved calcium and magnesium minerals.611.6 MG/LAverageSource waterDetected — no federal limit
pHA measure of how acidic or basic the water is.7.6938775510204085 PHAverageEntry pointDetected — no federal limit

Inorganic chemicals

ContaminantMeasuredStatus
ChlorideA naturally occurring salt compound.990.1086956521739 MG/LAverageSource waterAt or above the limit
SulfateA naturally occurring mineral from rock and soil.248.0581395348837 MG/LAverageSource waterWithin the limit
FluorideA mineral often added to drinking water to help prevent tooth decay.0.41200000000000003 MG/LAverageSource waterWithin the limit
AsbestosNot detected MFLHighest single sampleSource waterNone detected
CyanideNot detected UG/LHighest single sampleSource waterNone detected
NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits.Not detected MG/LHighest single sampleSource waterNone detected
NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits.Not detected MG/LHighest single sampleSource waterNone detected

Radionuclides

ContaminantMeasuredStatus
Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements.0.45266666666666666 PCI/LAverageSource waterWithin the limit
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.0.9548 PCI/LAverageSource waterWithin the limit
UraniumA naturally occurring radioactive metal from erosion of natural deposits.Not detected PCI/LHighest single sampleSource waterNone detected

Disinfection byproducts

ContaminantMeasuredStatus
PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection.Not detected UG/LHighest single sampleSource waterNone detected

Other

ContaminantMeasuredStatus
CarbofuranNot detected UG/LHighest single sampleSource waterNone detected
Carbon TetrachlorideNot detected UG/LHighest single sampleEntry pointNone detected
ChlordaneNot detected UG/LHighest single sampleSource waterNone detected
ChlorobenzeneNot detected UG/LHighest single sampleSource waterNone detected
ChromiumNot detected UG/LHighest single sampleSource waterNone detected
Cis Dichloroethylene 12Not detected UG/LHighest single sampleEntry pointNone detected
DehaNot detected UG/LHighest single sampleSource waterNone detected
DehpNot detected UG/LHighest single sampleSource waterNone detected
Dichloroethane 12Not detected UG/LHighest single sampleSource waterNone detected
Dichloroethylene 11Not detected UG/LHighest single sampleSource waterNone detected
Dichloropropane 12Not detected UG/LHighest single sampleSource waterNone detected
DinosebNot detected UG/LHighest single sampleSource waterNone detected
DiquatNot detected UG/LHighest single sampleSource waterNone detected
EdbNot detected UG/LHighest single sampleSource waterNone detected
EndothallNot detected UG/LHighest single sampleSource waterNone detected
EndrinNot detected UG/LHighest single sampleSource waterNone detected
GlyphosateNot detected UG/LHighest single sampleSource waterNone detected
HeptachlorNot detected UG/LHighest single sampleSource waterNone detected
Heptachlor EpoxideNot detected UG/LHighest single sampleSource waterNone detected
HexachlorobenzeneNot detected UG/LHighest single sampleSource waterNone detected
HexachlorocyclopentadieneNot detected UG/LHighest single sampleSource waterNone detected
MethoxychlorNot detected UG/LHighest single sampleSource waterNone detected
Nitrate NitriteNot detected MG/LHighest single sampleSource waterNone detected
O DichlorobenzeneNot detected UG/LHighest single sampleSource waterNone detected
OxamylNot detected UG/LHighest single sampleSource waterNone detected
P DichlorobenzeneNot detected UG/LHighest single sampleSource waterNone detected
Pcb TotalNot detected UG/LHighest single sampleSource waterNone detected
PceNot detected UG/LHighest single sampleEntry pointNone detected
PentachlorophenolNot detected UG/LHighest single sampleSource waterNone detected
PicloramNot detected UG/LHighest single sampleSource waterNone detected
StyreneNot detected UG/LHighest single sampleSource waterNone detected
TceNot detected UG/LHighest single sampleEntry pointNone detected
ToxapheneNot detected UG/LHighest single sampleSource waterNone detected
Trans Dichloroethylene 12Not detected UG/LHighest single sampleEntry pointNone detected
Trichlorobenzene 124Not detected UG/LHighest single sampleSource waterNone detected
Trichloroethane 111Not detected UG/LHighest single sampleEntry pointNone detected
Trichloroethane 112Not detected UG/LHighest single sampleSource waterNone detected
TwofourdNot detected UG/LHighest single sampleSource waterNone detected
Vinyl ChlorideNot detected UG/LHighest single sampleSource waterNone detected

PFAS ("forever chemicals")

ContaminantMeasuredStatus
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound.Not detected NG/LHighest single sampleSource waterNone detected
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound.Not detected NG/LHighest single sampleSource waterNone detected
4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound.Not detected NG/LHighest single sampleSource waterNone detected
6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound.Not detected NG/LHighest single sampleSource waterNone detected
8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound.Not detected NG/LHighest single sampleSource waterNone detected
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound.Not detected NG/LHighest single sampleSource waterNone detected
Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound.Not detected NG/LHighest single sampleSource waterNone detected
Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound.Not detected NG/LHighest single sampleSource waterNone detected
Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound.Not detected NG/LHighest single sampleSource waterNone detected
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound.Not detected NG/LHighest single sampleSource waterNone detected
Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected
PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.'Not detected NG/LHighest single sampleSource waterNone detected

VOCs & pesticides

ContaminantMeasuredStatus
1,2,3-TCPNot detected UG/LHighest single sampleSource waterNone detected
AtrazineA widely used agricultural herbicide that reaches water through runoff.Not detected UG/LHighest single sampleSource waterNone detected
BenzeneNot detected UG/LHighest single sampleSource waterNone detected
Benzo(a)pyreneNot detected UG/LHighest single sampleSource waterNone detected
ChloroethaneA volatile organic compound used in some industrial processes.Not detected UG/LHighest single sampleSource waterNone detected
ChloromethaneNot detected UG/LHighest single sampleEntry pointNone detected
DalaponNot detected UG/LHighest single sampleSource waterNone detected
DichlorodifluoromethaneNot detected UG/LHighest single sampleEntry pointNone detected
DichloromethaneNot detected UG/LHighest single sampleEntry pointNone detected
EthylbenzeneNot detected UG/LHighest single sampleSource waterNone detected
SimazineNot detected UG/LHighest single sampleSource waterNone detected
TolueneNot detected UG/LHighest single sampleEntry pointNone detected
XylenesA group of industrial solvents found in gasoline and paint.Not detected UG/LHighest single sampleSource waterNone detected
Source: Torrance-city, Water Dept., CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.

People also ask about Torrance-city, Water Dept., CA's water

+Is Torrance-city, Water Dept., CA tap water safe to drink in 2023?

The 2023 Consumer Confidence Report for the Torrance-city, Water Dept., CA water utility lists 4 contaminants at or above the federal limit: Manganese, Total Dissolved Solids, Chloride, and Specific Conductance. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.

+What contaminants are in Torrance-city, Water Dept., CA tap water?

123 contaminants were measured in Torrance-city, Water Dept., CA's 2023 Consumer Confidence Report, spanning other, metals, and pfas ("forever chemicals"). 81 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.

+Which contaminants exceed federal limits in Torrance-city, Water Dept., CA tap water?

4 contaminants in Torrance-city, Water Dept., CA's 2023 report sit at or above the federal limit: Manganese (2.7× the limit); Total Dissolved Solids (2.3× the limit); Chloride (2.0× the limit); Specific Conductance (1.9× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.

+What is the worst contaminant in Torrance-city, Water Dept., CA tap water?

The contaminant with the highest measured value relative to its federal limit in the 2023 report is Manganese, at 2.7× the federal threshold. It belongs to the metals family of contaminants.

+Where does the data on this page come from?

Every value is transcribed from Torrance-city, Water Dept., CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.

+How often is Torrance-city, Water Dept., CA's water quality data updated?

Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.

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