Drinking water quality · 2023
· Verified
What's in Santa Monica-city, Water Division — Los Angeles, Ca, CA tap water
23 contaminants were measured in the Santa Monica-city, Water Division — Los Angeles, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 23
- Over federal limit
- 1
- Approaching the limit
- 1
- Worst contaminant
- Lead
- Service area
- CA
6.0× the limit
state-level CCR
At or above the federal limit
Approaching the limit (≥ 80%)
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 90 ug/LAverageLOCAL WELL WATER Arcadia Plant | 0.2 ug/LPublic health goal | At or above the limit |
+By source (5)— Sm Well #1, Citywide Distribution System, LOCAL WELL WATER Arcadia Plant +2 more
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.04 mg/LAverageSm Well #1 | 2 mg/LPublic health goal | Within the limit |
+By source (3)— Sm Well #1, LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected ug/LRangeIMPORTED SURFACE WATER Jensen Plant | 0.004 ug/LPublic health goal | None detected |
+By source (3)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant, LOCAL WELL WATER Arcadia Plant
| |||
| CopperA metal that enters water from corroding household plumbing. | 0 mg/LAverageIMPORTED SURFACE WATER Jensen Plant | 0.3 mg/LPublic health goal | None detected |
+By source (2)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 93 ug/LAverageIMPORTED SURFACE WATER Weymouth Plant | 600 ug/LPublic health goal | Detected — no federal limit |
+By source (3)— IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant, LOCAL WELL WATER Arcadia Plant
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0–3.5 mg/LAverageIMPORTED SURFACE WATER Weymouth Plant | None set | Approaching the limit |
+By source (5)— IMPORTED SURFACE WATER Weymouth Plant, Citywide Distribution System, IMPORTED SURFACE WATER Jensen Plant +2 more
| |||
| Chromium | 1.7 ug/LAverageSm Well #1 | 0.02 ug/LPublic health goal | Within the limit |
+By source (4)— Sm Well #1, LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Weymouth Plant +1 more
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 6.9–50.2 ug/LAverageIMPORTED SURFACE WATER Jensen Plant | None set | Within the limit |
+By source (5)— Citywide Distribution System, IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant +2 more
| |||
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 3.1 ug/LAverageIMPORTED SURFACE WATER Jensen Plant | 0.1 ug/LPublic health goal | Within the limit |
+By source (2)— IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–17.5 ug/LAverageIMPORTED SURFACE WATER Weymouth Plant | None set | Within the limit |
+By source (5)— IMPORTED SURFACE WATER Weymouth Plant, Citywide Distribution System, IMPORTED SURFACE WATER Jensen Plant +2 more
| |||
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0.7 ug/LAverageSm Well #1 | 1 ug/LPublic health goal | Detected — no federal limit |
+By source (4)— Sm Well #1, IMPORTED SURFACE WATER Jensen Plant, LOCAL WELL WATER Arcadia Plant +1 more
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7–1.9 mg/LAverageIMPORTED SURFACE WATER Weymouth Plant | 1 mg/LPublic health goal | Within the limit |
+By source (5)— IMPORTED SURFACE WATER Jensen Plant, Citywide Distribution System, IMPORTED SURFACE WATER Weymouth Plant +2 more
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2.8 mg/LAverageSm Well #1 | 10 mg/LPublic health goal | Within the limit |
+By source (4)— Sm Well #1, IMPORTED SURFACE WATER Jensen Plant, LOCAL WELL WATER Arcadia Plant +1 more
| |||
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TrichloroethyleneAn industrial solvent (TCE) used in metal degreasing. | 0.7 ug/LAverageLOCAL WELL WATER Arcadia Plant | 1.7 ug/LPublic health goal | Within the limit |
+By source (3)— LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
| 1,2,3-TCP | Not detected ng/LAverageLOCAL WELL WATER Arcadia Plant | 0.7 ng/LPublic health goal | None detected |
+By source (3)— LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
| MTBE | Not detected ug/LRangeLOCAL WELL WATER Arcadia Plant | 13 ug/LPublic health goal | None detected |
+By source (4)— LOCAL WELL WATER Arcadia Plant, Sm Well #1, IMPORTED SURFACE WATER Weymouth Plant +1 more
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0RangeLOCAL WELL WATER Arcadia Plant | None set | None detected |
+By source (5)— LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant +2 more
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | Not detected NTUAverageIMPORTED SURFACE WATER Weymouth Plant | 1 NTUMCL | None detected |
+By source (2)— IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.4 mg/LAverageIMPORTED SURFACE WATER Jensen Plant | None set | Detected — no federal limit |
+By source (2)— IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected pCi/LAverageIMPORTED SURFACE WATER Jensen Plant | 5 pCi/LMCL | None detected |
+By source (3)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant, LOCAL WELL WATER Arcadia Plant
| |||
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | Not detected pCi/LRangeIMPORTED SURFACE WATER Weymouth Plant | 15 pCi/LMCL | None detected |
+By source (3)— IMPORTED SURFACE WATER Weymouth Plant, LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | Not detected pCi/LAverageIMPORTED SURFACE WATER Weymouth Plant | None set | Detected — no federal limit |
+By source (2)— IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 2 pCi/LAverageIMPORTED SURFACE WATER Jensen Plant | 0.43 pCi/LPublic health goal | Detected — no federal limit |
+By source (3)— IMPORTED SURFACE WATER Weymouth Plant, IMPORTED SURFACE WATER Jensen Plant, LOCAL WELL WATER Arcadia Plant
| |||
Source: Santa Monica-city, Water Division — Los Angeles, Ca, 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 Santa Monica-city, Water Division — Los Angeles, Ca, CA's water
+Is Santa Monica-city, Water Division — Los Angeles, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Santa Monica-city, Water Division — Los Angeles, Ca, CA water utility lists 1 contaminant at or above the federal limit: Lead. 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 Santa Monica-city, Water Division — Los Angeles, Ca, CA tap water?
23 contaminants were measured in Santa Monica-city, Water Division — Los Angeles, Ca, CA's 2023 Consumer Confidence Report, spanning metals, disinfection byproducts, and radionuclides. 17 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 Santa Monica-city, Water Division — Los Angeles, Ca, CA tap water?
One contaminant in Santa Monica-city, Water Division — Los Angeles, Ca, CA's 2023 report sits at or above the federal limit: Lead (6.0× 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 Santa Monica-city, Water Division — Los Angeles, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Lead, at 6.0× the federal threshold. It belongs to the metals family of contaminants.
+Are any contaminants in Santa Monica-city, Water Division — Los Angeles, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Chlorine Total. 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 Santa Monica-city, Water Division — Los Angeles, Ca, 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 Santa Monica-city, Water Division — Los Angeles, Ca, 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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