Drinking water quality · 2024
· Verified
What's in Torrance, CA tap water
24 contaminants were measured in the Torrance, CA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 24
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
Where your water comes from · EPA SDWIS
Torrance, CA's drinking water comes from ground water, drawn from 5 sources.
Source
- WELL · 3
- DELTHORNE PARK WELL
- CITY YARD WELL
Treatment
- COMBINED RO EFFLUENT AFTER BLENDING
- COMBINED RO EFFLUENT PRIOR TO BLENDING
- N. TORRANCE WELL FIELD TREATMENT PLANT
Distribution
Also buys water from METROPOLITAN WATER DIST. OF SO. CAL..
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.1–0.9 NTURangeSystem-wide | 1 NTUMCL | Approaching the limit |
| ColorA measure of visible tint in the water. | 0–8.8RangeSystem-wide | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 0–4RangeSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1000–1400RangeSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 170–1100 mg/LRangeSystem-wide | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 14–60.1 ug/LRangeSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–26.2 ug/LRangeSystem-wide | None set | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.13–2.64 mg/LRangeSystem-wide | None set | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0–1.69 pCi/LRangeSystem-wide | 5 pCi/LMCL | Within the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–5 pCi/LRangeSystem-wide | 15 pCi/LMCL | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 0–5 pCi/LRangeSystem-wide | None set | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0–3 pCi/LRangeSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.64–1.1 mg/LRangeSystem-wide | 4 mg/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 81–160 mg/LRangeSystem-wide | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 140–340 mg/LRangeSystem-wide | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.19 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–1.4 ug/LRangeSystem-wide | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.07–0.14 mg/LRangeSystem-wide | 2 mg/LMCL | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 0–1.3 ug/LRangeSystem-wide | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 0–210 ug/LRangeSystem-wide | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 0–58 ug/LRangeSystem-wide | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 0–58 ug/LRangeSystem-wide | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| MTBE | 0–28 ug/LRangeSystem-wide | None set | Detected — no federal limit |
People also ask about Torrance, CA's water
+Is Torrance, CA tap water safe to drink in 2024?
Every one of the 24 contaminants measured in Torrance, CA's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Torrance, CA tap water?
24 contaminants were measured in Torrance, CA's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and radionuclides. 8 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Torrance, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Turbidity. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Torrance, CA's 2024 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, 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 2024 report; a new report will replace it once the utility publishes its next annual update.