Drinking water quality · 2025
· Verified
What's in Oxnard Water Dept, CA tap water
121 contaminants were measured in the Oxnard Water Dept, CA water system's 2025 annual report. Each is shown below against its federal limit — 3 sit at or above that limit.
- Reporting year
- 2025
- Contaminants measured
- 121
- Over federal limit
- 3
- Approaching the limit
- 0
- Worst contaminant
- Total Dissolved Solids
- Service area
- CA
1.6× the limit
state-level CCR
At or above the federal limit
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Oxnard Water Dept, CA
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 39 mg/LSample year 2023Samples 12 detect / 12
near national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PWSID CA5610007 · 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
Oxnard Water Dept, CA's drinking water comes from ground water, drawn from 9 sources.
Source
9ground water
- WELL · 7
- WELLS 32, 33 & 34 BLENDED RAW
- WELL 22
Treatment
12treatment plants
- WELL 28 - TRT CL
- BS#3 - NITRATE BLEND - TREATED
- WELL 29 - TRT CL
- + 9 more
Distribution
0storage units
Also buys water from CALLEGUAS MUNICIPAL WATER DIST, UNITED WTR CONS DIST.
Source: EPA SDWIS facilities inventory. Methodology.
Historical readings · EPA Six-Year Review (2012–2019)
5 contaminants historically over EPA limits in Oxnard Water Dept, CA
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.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
GROSS BETA worst: 2016 | 35 mrem/yr 8.8× | 4 mrem/yr | '12'13'14'16'17'18'19 |
SELENIUM worst: 2019 | 0.089 mg/L 1.8× | 0.05 mg/L | '13'14'16'17'18'19 |
NITRATE worst: 2014 | 17.6 mg/L 1.8× | 10 mg/L | '12'13'14'15'16'17'18'19 |
DEHP worst: 2019 | 0.0088 mg/L 1.5× | 0.006 mg/L | '19 |
NITRATE NITRITE worst: 2016 | 13 mg/L 1.3× | 10 mg/L | '13'16'17'18'19 |
EDB worst: 2018 | 0.000044 mg/L 88% | 0.00005 mg/L | '18 |
ARSENIC worst: 2019 | 0.0065 mg/L within below national p90 | 0.01 mg/L | '13'16'19 |
TTHM worst: 2015 | 0.052 mg/L within | 0.08 mg/L | '12'13'15'16'17'18'19 |
FLUORIDE worst: 2016 | 1.3 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2013 | 0.014 mg/L within | 0.06 mg/L | '12'13'15'16'17'18'19 |
DICHLOROMETHANE worst: 2014 | 0.00056 mg/L within | 0.005 mg/L | '14 |
URANIUM worst: 2016 | 0.0268 ug/L within above national p90 | 30 ug/L | '14'16'17'18'19 |
COPPER worst: 2012 | 0.0064 mg/L below national p90 | — | '12 |
DBAA worst: 2012 | 0.0051 mg/L | — | '12'13'15'16'17'18'19 |
DCAA worst: 2012 | 0.0014 mg/L | — | '12'13'15'16'17'18'19 |
MBAA worst: 2012 | 0.0027 mg/L | — | '12'13'17 |
MCAA worst: 2012 | 0.0036 mg/L | — | '12'13 |
TCAA worst: 2012 | 0.0013 mg/L | — | '12'15'18 |
BROMODICHLOROMETHANE worst: 2012 | 0.0035 mg/L | — | '12'13'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.013 mg/L | — | '12'13'15'16'17'18'19 |
CHLOROFORM worst: 2015 | 0.0062 mg/L | — | '15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0098 mg/L | — | '12'13'15'16'17'18'19 |
PWSID CA5610007 · 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.
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 1607.7 MG/LAverageSource water | 1000 MG/LMCL | At or above the limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 2027.2727272727273 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | At or above the limit |
| OdorA measure of detectable smell in the water. | 1 TONAverageDistribution | 3 TONMCL | Within the limit |
| ColorA measure of visible tint in the water. | 4.875 UNITSAverageSource water | 15 UNITSMCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 1.3625 NTUAverageSource water | 5 NTUMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 233.26153846153846 MG/LAverageSource water | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 880.5510204081633 MG/LAverageSource water | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.703333333333333 PHAverageSource water | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 754.040404040404 MG/LAverageSource water | 500 MG/LMCL | At or above the limit |
| ChlorideA naturally occurring salt compound. | 73.44444444444444 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| Asbestos | Not detected MFLHighest single sampleDistribution | 7 MFLMCL | None detected |
| Cyanide | Not detected UG/LHighest single sampleDistribution | 150 UG/LMCL | None detected |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected MG/LHighest single sampleEntry point | 1 MG/LMCL | None detected |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ManganeseA naturally occurring metal from soil and rock. | 30.998 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| IronA naturally occurring metal common in groundwater. | 88.22549019607843 UG/LAverageSource water | 300 UG/LMCL | Within the limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.03975 UG/LAverageSource water | 10 UG/LMCL | Within the limit |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 7 UG/LAverageSource water | 5000 UG/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | Not detected UG/LHighest single sampleDistribution | 1000 UG/LMCL | None detected |
| Antimony | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| BariumA metal from erosion of natural deposits and industrial discharge. | Not detected UG/LHighest single sampleSource water | 1000 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleDistribution | 4 UG/LMCL | None detected |
| Cadmium | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected UG/LHighest single sampleDistribution | 2 UG/LMCL | None detected |
| NickelA metal from natural deposits and industrial discharge. | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Strontium | Not detected PCI/LHighest single sampleDistribution | 8 PCI/LMCL | None detected |
| Thallium | Not detected UG/LHighest single sampleSource water | 2 UG/LMCL | None detected |
| BoronA naturally occurring element from rock and soil. | 813.3333333333334 UG/LAverageSource water | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 190.33391304347828 MG/LAverageSource water | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 79.25204081632653 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 5.766666666666667 MG/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 111.66666666666667 MG/LAverageSource water | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.9033333333333338 PCI/LAverageSource water | 15 PCI/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.6487499999999999 PCI/LAverageSource water | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0.9 UG/LAverageSource water | 6 UG/LMCL | Within the limit |
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | Not detected UG/LHighest single sampleDistribution | 10 UG/LMCL | None detected |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 27 UG/LAverageDistribution | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Carbofuran | Not detected UG/LHighest single sampleDistribution | 18 UG/LMCL | None detected |
| Carbon Tetrachloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Chlordane | Not detected UG/LHighest single sampleSource water | 0.1 UG/LMCL | None detected |
| Chlorobenzene | Not detected UG/LHighest single sampleDistribution | 70 UG/LMCL | None detected |
| Chromium | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| Cis Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Deha | Not detected UG/LHighest single sampleSource water | 400 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleDistribution | 0.5 UG/LMCL | None detected |
| Dichloroethylene 11 | Not detected UG/LHighest single sampleDistribution | 6 UG/LMCL | None detected |
| Dichloropropane 12 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Dinoseb | Not detected UG/LHighest single sampleSource water | 7 UG/LMCL | None detected |
| Diquat | Not detected UG/LHighest single sampleDistribution | 20 UG/LMCL | None detected |
| Endothall | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Endrin | Not detected UG/LHighest single sampleDistribution | 2 UG/LMCL | None detected |
| Glyphosate | Not detected UG/LHighest single sampleDistribution | 700 UG/LMCL | None detected |
| Heptachlor | Not detected UG/LHighest single sampleDistribution | 0.01 UG/LMCL | None detected |
| Heptachlor Epoxide | Not detected UG/LHighest single sampleSource water | 0.01 UG/LMCL | None detected |
| Hexachlorobenzene | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Hexachlorocyclopentadiene | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| Methoxychlor | Not detected UG/LHighest single sampleDistribution | 30 UG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleDistribution | 600 UG/LMCL | None detected |
| Oxamyl | Not detected UG/LHighest single sampleDistribution | 50 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleDistribution | 5 UG/LMCL | None detected |
| Pcb Total | Not detected UG/LHighest single sampleDistribution | 0.5 UG/LMCL | None detected |
| Pce | Not detected UG/LHighest single sampleDistribution | 5 UG/LMCL | None detected |
| Pentachlorophenol | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Picloram | Not detected UG/LHighest single sampleDistribution | 500 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Tce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Toxaphene | Not detected UG/LHighest single sampleDistribution | 3 UG/LMCL | None detected |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleDistribution | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleDistribution | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Twofourd | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleDistribution | 0.5 UG/LMCL | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 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 water | None set | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None 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 water | None set | None detected |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorotetradecanoic acid (PFTeDA)Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorotridecanoic acid (PFTrDA)Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | Not detected UG/LHighest single sampleEntry point | 0.005 UG/LMCL | None detected |
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | Not detected UG/LHighest single sampleDistribution | 1 UG/LMCL | None detected |
| Benzene | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzo(a)pyrene | Not detected UG/LHighest single sampleDistribution | 0.2 UG/LMCL | None detected |
| ChloroethaneA volatile organic compound used in some industrial processes. | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| Chloromethane | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| Dalapon | Not detected UG/LHighest single sampleSource water | 200 UG/LMCL | None detected |
| Dichlorodifluoromethane | Not detected UG/LHighest single sampleSource water | None set | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleDistribution | 300 UG/LMCL | None detected |
| Simazine | Not detected UG/LHighest single sampleSource water | 4 UG/LMCL | None detected |
| Toluene | Not detected UG/LHighest single sampleSource water | 150 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleDistribution | 1750 UG/LMCL | None detected |
Source: Oxnard Water Dept, CA's 2025 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 Oxnard Water Dept, CA's water
+Is Oxnard Water Dept, CA tap water safe to drink in 2025?
The 2025 Consumer Confidence Report for the Oxnard Water Dept, CA water utility lists 3 contaminants at or above the federal limit: Total Dissolved Solids, Sulfate, 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 Oxnard Water Dept, CA tap water?
121 contaminants were measured in Oxnard Water Dept, CA's 2025 Consumer Confidence Report, spanning other, metals, and pfas ("forever chemicals"). 84 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 Oxnard Water Dept, CA tap water?
3 contaminants in Oxnard Water Dept, CA's 2025 report sit at or above the federal limit: Total Dissolved Solids (1.6× the limit); Sulfate (1.5× the limit); Specific Conductance (1.3× 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 Oxnard Water Dept, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2025 report is Total Dissolved Solids, at 1.6× the federal threshold. It belongs to the physical & aggregate family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Oxnard Water Dept, CA's 2025 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 Oxnard 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 2025 report; a new report will replace it once the utility publishes its next annual update.
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