Drinking water quality · 2024
· Verified
What's in Oxnard, CA tap water
30 contaminants were measured in the Oxnard, CA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 30
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Where your water comes from · EPA SDWIS
Oxnard, 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.
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.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 790 ug/LRunning annual avgGreatest LRAA | 1300 ug/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0022 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1.04 ug/LAverageSystem-wide | None set | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 3.3 ug/LAverageSystem-wide | None set | Within the limit |
| BoronA naturally occurring element from rock and soil. | 462.5 ug/LAverageSystem-wide | 1 ug/LNL | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 91.45 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| IronA naturally occurring metal common in groundwater. | 74.98 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 32.4 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 4.05 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 71 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.59 mg/LRunning annual avgGreatest LRAA | 4 mg/LMCL | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 3.1 ug/LRunning annual avgGreatest LRAA | None set | Within the limit |
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 20.87 ug/LRunning annual avgGreatest LRAA | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 4.58 ug/LRunning annual avgGreatest LRAA | None set | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 2.39 pCi/LAverageSystem-wide | 15 pCi/LMCL | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 3.89 pCi/LAverageSystem-wide | None set | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 3.67 pCi/LAverageSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 1.48 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.43 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 48.75 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 318.62 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.075 NTUAverageSystem-wide | 1 NTUMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 180 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 356.75 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.62AverageSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 918AverageSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 680 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0RangeSystem-wide | 0Public health goal | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | Not detected ng/LRangeSystem-wide | 0.007 ng/LPublic health goal | None detected |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | Not detected ng/LRangeSystem-wide | 1 ng/LPublic health goal | None detected |
People also ask about Oxnard, CA's water
+Is Oxnard, CA tap water safe to drink in 2024?
Every one of the 30 contaminants measured in Oxnard, CA's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Oxnard, CA tap water?
30 contaminants were measured in Oxnard, CA's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 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.
+Where does the data on this page come from?
Every value is transcribed from Oxnard, 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 Oxnard, 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.