Drinking water quality · 2024
What's in Santa Clarita, CA tap water
47 contaminants were measured in the Santa Clarita, CA water system's 2024 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 47
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- PFOS
- Service area
- CA
1.6× the limit
state-level CCR
Where your water comes from · EPA SDWIS
Santa Clarita, CA's drinking water comes from ground water, drawn from 21 sources.
Source
21ground water
- WELL · 13
- WELL 13-02
- WELL 22-02
- WELL 18-02
- + 5 more
Treatment
0treatment plants
Distribution
0storage units
Also buys water from SANTA CLARA VALLEY WATER DISTRICT, SAN FRANCISCO REGIONAL WATER SYSTEM.
Source: EPA SDWIS facilities inventory. Methodology.
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.
- Treatment technique violationHealth-based2 violations on record · most recent Mar 1995resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 6.5 ng/LAverageLos Angeles County Waterworks District #36 | 6500000000000000 ng/LNL | At or above the limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 4.5 ng/LAverageLos Angeles County Waterworks District #36 | 5100000000000001 ng/LNL | At or above the limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| 4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| 6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| 8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | 10 ng/LMCL | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Nonafluoro-3,6-dioxaheptanoic acidNonafluoro-3,6-dioxaheptanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LAverageSanta Clarita Valley Water Agency | 3000000000000000 ng/LNL | Within the limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected ng/LMaximumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorotetradecanoic acid (PFTeDA)Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorotridecanoic acid (PFTrDA)Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSanta Clarita Valley Water Agency | None set | None detected |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LAverageSanta Clarita Valley Water Agency | 500000000000000000 ng/LNL | Detected — no federal limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | Not detected ng/LAverageSanta Clarita Valley Water Agency | None set | Detected — no federal limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LAverageSanta Clarita Valley Water Agency | None set | Detected — no federal limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LAverageSanta Clarita Valley Water Agency | None set | Detected — no federal limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LAverageSanta Clarita Valley Water Agency | None set | Detected — no federal limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 56 ug/LAverageSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 34.9 ug/LAverageSystem-wide | None set | Within the limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected ug/LAverageCSC Well Water | None set | Detected — no federal limit |
+By source (3)— CSC Well Water, SFPUC, Valley Water
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.47 mg/L90th percentileSystem-wide | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.14 mg/LAverageCSC Well Water | 2 mg/LMCL | Within the limit |
+By source (3)— CSC Well Water, Valley Water, SFPUC
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1 ug/LAverageSystem-wide | None set | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected ug/LAverageCSC Well Water | None set | Within the limit |
+By source (3)— CSC Well Water, SFPUC, Valley Water
| |||
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 1.9 ug/LAverageCSC Well Water | None set | Detected — no federal limit |
+By source (3)— CSC Well Water, Valley Water, SFPUC
| |||
| LithiumA naturally occurring element found in some groundwater. | 46 ug/LAverageLos Angeles County Waterworks District #36 | None set | Detected — no federal limit |
+By source (2)— Santa Clarita Valley Water Agency, Los Angeles County Waterworks District #36
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 3.3 mg/LAverageCSC Well Water | 10 mg/LMCL | Within the limit |
+By source (3)— CSC Well Water, SFPUC, Valley Water
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageValley Water | 4 mg/LMCL | Within the limit |
+By source (3)— Valley Water, CSC Well Water, SFPUC
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.3 pCi/LAverageSFPUC | 15 pCi/LMCL | Within the limit |
+By source (2)— SFPUC, Valley Water
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.3 pCi/LAverageSFPUC | 20 pCi/LMCL | Detected — no federal limit |
+By source (2)— SFPUC, Valley Water
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.8 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Toluene | 0.6 ug/LAverageCSC Well Water | None set | Within the limit |
+By source (3)— CSC Well Water, SFPUC, Valley Water
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0RangeSystem-wide | None set | None detected |
| Giardia lamblia | 0.02AverageValley Water | None set | Detected — no federal limit |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | Not detected %AverageSystem-wide | None set | Detected — no federal limit |
Source: Santa Clarita, CA's 2024 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 Clarita, CA's water
+Is Santa Clarita, CA tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Santa Clarita, CA water utility lists 2 contaminants at or above the federal limit: PFOS and PFOA. 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 Clarita, CA tap water?
47 contaminants were measured in Santa Clarita, CA's 2024 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and disinfection byproducts. 12 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 Clarita, CA tap water?
2 contaminants in Santa Clarita, CA's 2024 report sit at or above the federal limit: PFOS (1.6× the limit); PFOA (1.1× 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 Clarita, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is PFOS, at 1.6× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Santa Clarita, 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 Santa Clarita, 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.
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