Drinking water quality · 2023
· Verified
What's in Oxnard Water Dept, CA tap water
95 contaminants were measured in the Oxnard Water Dept, CA water system's 2023 annual report. Each is shown below against its federal limit — 4 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 95
- Over federal limit
- 4
- Approaching the limit
- 1
- Worst contaminant
- Sulfate
- Service area
- CA
- SulfateInorganic chemicals · Average803.0337078651686 MG/Llimit 500 MG/L · 1.6× the limit
- Total Dissolved SolidsPhysical & aggregate · Average1514.943820224719 MG/Llimit 1000 MG/L · 1.5× the limit
- Specific ConductancePhysical & aggregate · Average1941.4634146341464 UMHO/CMlimit 1600 UMHO/CM · 1.2× the limit
- Gross AlphaRadionuclides · Average15.6 PCI/Llimit 15 PCI/L · 1.0× the 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)near national p90 (76.59999999999991 mg/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Oxnard Water Dept, CA's drinking water comes from ground water, drawn from 9 sources.
Source
- WELL · 7
- WELLS 32, 33 & 34 BLENDED RAW
- WELL 22
Treatment
- WELL 28 - TRT CL
- BS#3 - NITRATE BLEND - TREATED
- WELL 29 - TRT CL
- + 9 more
Distribution
Also buys water from CALLEGUAS MUNICIPAL WATER DIST, UNITED WTR CONS DIST.
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 |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 803.0337078651686 MG/LAverageSource water | 500 MG/LMCL | At or above the limit |
| ChlorideA naturally occurring salt compound. | 89 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| Cyanide | Not detected UG/LHighest single sampleSource water | 150 UG/LMCL | None detected |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected MG/LHighest single sampleSource water | 1 MG/LMCL | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 1514.943820224719 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. | 1941.4634146341464 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | At or above the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 254.83516483516485 MG/LAverageSource water | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 821.7078651685393 MG/LAverageSource water | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.725609756097561 PHAverageDistribution | 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. | 15.6 PCI/LAverageSource water | 15 PCI/LMCL | At or above the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected PCI/LHighest single sampleSource water | None set | None detected |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ManganeseA naturally occurring metal from soil and rock. | 31.579775280898875 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| IronA naturally occurring metal common in groundwater. | 56.57303370786517 UG/LAverageSource water | 300 UG/LMCL | Within the limit |
| Cadmium | 0.64 UG/LAverageSource water | 5 UG/LMCL | Within the limit |
| NickelA metal from natural deposits and industrial discharge. | 4.3 UG/LAverageSource water | 100 UG/LMCL | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 30 UG/LAverageSource water | 1000 UG/LMCL | Within the limit |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 18 UG/LAverageSource water | 5000 UG/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | Not detected UG/LHighest single sampleSource water | 1000 UG/LMCL | None detected |
| Antimony | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleSource water | 4 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 sampleSource water | 2 UG/LMCL | None detected |
| Strontium | Not detected PCI/LHighest single sampleSource water | 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. | 935 UG/LAverageSource water | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 207.38555555555556 MG/LAverageSource water | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 72.40224719101124 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 7.1 MG/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 140 MG/LAverageSource water | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Carbofuran | Not detected UG/LHighest single sampleSource water | 18 UG/LMCL | None detected |
| Carbon Tetrachloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Chlorobenzene | Not detected UG/LHighest single sampleSource water | 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 sampleSource water | 0.5 UG/LMCL | None detected |
| Dichloroethylene 11 | Not detected UG/LHighest single sampleSource water | 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 sampleSource water | 20 UG/LMCL | None detected |
| Endothall | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Glyphosate | Not detected UG/LHighest single sampleSource water | 700 UG/LMCL | None detected |
| Hexachlorocyclopentadiene | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 600 UG/LMCL | None detected |
| Oxamyl | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Pce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Pentachlorophenol | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Picloram | Not detected UG/LHighest single sampleSource water | 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 |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleSource water | 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 sampleSource water | 0.5 UG/LMCL | None detected |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | Not detected UG/LHighest single sampleSource water | 0.005 UG/LMCL | None detected |
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | Not detected UG/LHighest single sampleSource water | 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 sampleSource water | 0.2 UG/LMCL | None detected |
| ChloroethaneA volatile organic compound used in some industrial processes. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| Chloromethane | Not detected UG/LHighest single sampleSource water | 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 sampleSource water | 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 sampleSource water | 1750 UG/LMCL | None detected |
People also ask about Oxnard Water Dept, CA's water
+Is Oxnard Water Dept, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Oxnard Water Dept, CA water utility lists 4 contaminants at or above the federal limit: Sulfate, Total Dissolved Solids, Specific Conductance, and Gross Alpha. 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?
95 contaminants were measured in Oxnard Water Dept, CA's 2023 Consumer Confidence Report, spanning other, metals, and vocs & pesticides. 71 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?
4 contaminants in Oxnard Water Dept, CA's 2023 report sit at or above the federal limit: Sulfate (1.6× the limit); Total Dissolved Solids (1.5× the limit); Specific Conductance (1.2× the limit); Gross Alpha (1.0× 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 Oxnard Water Dept, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Sulfate, at 1.6× the federal threshold. It belongs to the inorganic chemicals family of contaminants.
+Are any contaminants in Oxnard Water Dept, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Uranium. 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 Oxnard Water Dept, 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 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 2023 report; a new report will replace it once the utility publishes its next annual update.