What's in Santa Monica-city, Water Division — Los Angeles, Ca, CA tap water

18 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.

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Reporting year: 2023
Contaminants measured: 18
Over federal limit: 0
Approaching the limit: 1
Service area: CA
Source: Utility CCR

Approaching the limit (≥ 80%)

Chlorine
Disinfectants
0–3.5 mg/L
88% of the limit

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.

No federal drinking-water violations on record for this system.

Disinfectants

Contaminant	Measured	Federal limit	Status
ChlorineA disinfectant added to drinking water to kill bacteria and viruses.	0–3.5 mg/LAverageIMPORTED SURFACE WATER Jensen Plant	None set	Approaching the limit
+By source (5)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant, Citywide Distribution System +2 more IMPORTED SURFACE WATER Jensen PlantPlant avg0–3.5 mg/Lrange0–3.5 mg/L88% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avg0–3.5 mg/Lrange0–3.5 mg/L88% of limit Citywide Distribution SystemZone 88% of limit LOCAL WELL WATER Arcadia PlantPlant avg2 mg/Lrange2 mg/L50% of limit Sm Well #1Plant avg2 mg/Lrange2 mg/L50% of limit

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 Jensen Plant	1 mg/LPublic health goal	Within the limit
+By source (5)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant, LOCAL WELL WATER Arcadia Plant +2 more IMPORTED SURFACE WATER Jensen PlantPlant avg0.7–1.9 mg/Lrange0.7–1.9 mg/L48% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avg0.7–1.9 mg/Lrange0.7–1.9 mg/L48% of limit LOCAL WELL WATER Arcadia PlantPlant avg0.6–1.2 mg/Lrange0.6–1.2 mg/L30% of limit Sm Well #1Plant avg0.6–1.2 mg/Lrange0.6–1.2 mg/L30% of limit Citywide Distribution SystemZone 30% of limit
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 Sm Well #1Plant avg2.8 mg/Lrange2.8 mg/L28% of limit IMPORTED SURFACE WATER Jensen PlantPlant avg0.5 mg/Lrange0.5 mg/L5% of limit LOCAL WELL WATER Arcadia PlantPlant avg0.2 mg/Lrange0–0.2 mg/L2% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected mg/LrangeNot detected mg/L0% of limit

Disinfection byproducts

Contaminant	Measured	Federal limit	Status
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 IMPORTED SURFACE WATER Weymouth PlantPlant avg2 ug/Lrange0–9.2 ug/L92% of limit IMPORTED SURFACE WATER Jensen PlantPlant avg3.1 ug/Lrange0–5.4 ug/L54% of limit
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.	0–17.5 ug/LAverageIMPORTED SURFACE WATER Jensen Plant	None set	Within the limit
+By source (5)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant, Citywide Distribution System +2 more IMPORTED SURFACE WATER Jensen PlantPlant avg0–17.5 ug/Lrange0–17.5 ug/L29% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avg0–17.5 ug/Lrange0–17.5 ug/L29% of limit Citywide Distribution SystemZone 29% of limit LOCAL WELL WATER Arcadia PlantPlant avg3.8 ug/Lrange3.8 ug/L6% of limit Sm Well #1Plant avg3.8 ug/Lrange3.8 ug/L6% of limit
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, LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Jensen Plant +1 more Sm Well #1Plant avg0.7 ug/Lrange0.7 ug/L LOCAL WELL WATER Arcadia PlantPlant avgNot detected ug/LrangeNot detected ug/L IMPORTED SURFACE WATER Jensen PlantPlant avgNot detected ug/LrangeNot detected ug/L IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected ug/LrangeNot detected ug/L

Other

Contaminant	Measured	Federal limit	Status
Tce	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 Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant LOCAL WELL WATER Arcadia PlantPlant avg0.7 ug/Lrange0.5–0.9 ug/L18% of limit IMPORTED SURFACE WATER Jensen PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
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 Sm Well #1Plant avg1.7 ug/Lrange1.7 ug/L2% of limit LOCAL WELL WATER Arcadia PlantPlant avgNot detected ug/Lrange0.1 ug/L0% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit IMPORTED SURFACE WATER Jensen PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit

Metals

Contaminant	Measured	Federal limit	Status
CopperA metal that enters water from corroding household plumbing.	90 ug/LAverageLOCAL WELL WATER Arcadia Plant	0.3 ug/LPublic health goal	Within the limit
+By source (5)— LOCAL WELL WATER Arcadia Plant, Sm Well #1, Citywide Distribution System +2 more LOCAL WELL WATER Arcadia PlantPlant avg90 ug/Lrange90 ug/L7% of limit Sm Well #1Plant avg90 ug/Lrange90 ug/L7% of limit Citywide Distribution SystemZone 7% of limit IMPORTED SURFACE WATER Jensen PlantPlant avg0 mg/Lrange0 mg/L0% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avg0 mg/Lrange0 mg/L0% of limit
BariumA metal from erosion of natural deposits and industrial discharge.	124 ug/LAverageIMPORTED SURFACE WATER Weymouth Plant	2 ug/LPublic health goal	Within the limit
+By source (4)— IMPORTED SURFACE WATER Weymouth Plant, Sm Well #1, LOCAL WELL WATER Arcadia Plant +1 more IMPORTED SURFACE WATER Weymouth PlantPlant avg124 ug/Lrange124 ug/L6% of limit Sm Well #1Plant avg0.04 mg/Lrange0.04 mg/L2% of limit LOCAL WELL WATER Arcadia PlantPlant avgNot detected mg/LrangeNot detected mg/L0% of limit IMPORTED SURFACE WATER Jensen PlantPlant avgNot detected mg/LrangeNot detected mg/L0% of limit
ArsenicA naturally occurring element that also enters water from industry and agriculture.	Not detected ug/LRangeLOCAL WELL WATER Arcadia Plant	0.004 ug/LPublic health goal	None detected
+By source (3)— LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant LOCAL WELL WATER Arcadia PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit IMPORTED SURFACE WATER Jensen PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.	0 ug/LAverageIMPORTED SURFACE WATER Jensen Plant	0.2 ug/LPublic health goal	None detected
+By source (2)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant IMPORTED SURFACE WATER Jensen PlantPlant avg0 ug/Lrange0 ug/L0% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avg0 ug/Lrange0 ug/L0% of limit
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 IMPORTED SURFACE WATER Weymouth PlantPlant avg93 ug/Lrange0–150 ug/L IMPORTED SURFACE WATER Jensen PlantPlant avg62 ug/Lrange52–91 ug/L LOCAL WELL WATER Arcadia PlantPlant avgNot detected ug/LrangeNot detected ug/L

Microbial

Contaminant	Measured	Federal limit	Status
Total ColiformA group of bacteria used as an indicator of overall water-system sanitation.	0AverageLOCAL WELL WATER Arcadia Plant	None set	None detected
+By source (5)— LOCAL WELL WATER Arcadia Plant, Sm Well #1, IMPORTED SURFACE WATER Jensen Plant +2 more LOCAL WELL WATER Arcadia PlantPlant avg0range0 Sm Well #1Plant avg0range0 IMPORTED SURFACE WATER Jensen PlantPlant avg0range0 IMPORTED SURFACE WATER Weymouth PlantPlant avg0range0 Citywide Distribution SystemZone

Physical & aggregate

Contaminant	Measured	Federal limit	Status
TurbidityA measure of cloudiness from suspended particles in the water.	Not detected NTUAverageIMPORTED SURFACE WATER Jensen Plant	1 NTUMCL	None detected
+By source (2)— IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant IMPORTED SURFACE WATER Jensen PlantPlant avgNot detected NTU0% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected NTU0% of limit
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 IMPORTED SURFACE WATER Weymouth PlantPlant avg2.4 mg/Lrange2.1–2.6 mg/L IMPORTED SURFACE WATER Jensen PlantPlant avg2.4 mg/Lrange2–2.5 mg/L

Radionuclides

Contaminant	Measured	Federal limit	Status
Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements.	Not detected pCi/LRangeLOCAL WELL WATER Arcadia Plant	5 pCi/LMCL	None detected
+By source (3)— LOCAL WELL WATER Arcadia Plant, IMPORTED SURFACE WATER Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant LOCAL WELL WATER Arcadia PlantPlant avgNot detected pCi/LrangeNot detected pCi/L0% of limit IMPORTED SURFACE WATER Jensen PlantPlant avgNot detected pCi/LrangeNot detected pCi/L0% of limit IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected pCi/LrangeNot detected pCi/L0% of limit
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 Jensen Plant, IMPORTED SURFACE WATER Weymouth Plant, LOCAL WELL WATER Arcadia Plant IMPORTED SURFACE WATER Jensen PlantPlant avg2 pCi/Lrange2–3 pCi/L IMPORTED SURFACE WATER Weymouth PlantPlant avgNot detected pCi/Lrange0–3 pCi/L LOCAL WELL WATER Arcadia PlantPlant avg1.6 pCi/Lrange1.1–2.1 pCi/L

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.