Drinking water quality · 2024
· Verified
What's in City of Thousand Oaks Water Department, CA tap water
40 contaminants were measured in the City of Thousand Oaks Water Department, CA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 40
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
state-level CCR
Where your water comes from · EPA SDWIS
City of Thousand Oaks Water Department, CA buys its drinking water from CALLEGUAS MUNICIPAL WATER DIST, CAL AMERICAN WATER CO, and 1 more.
Source
0sources
Treatment
0treatment plants
Distribution
0storage units
Also buys water from CALLEGUAS MUNICIPAL WATER DIST, CAL AMERICAN WATER CO, and 1 more.
Source: EPA SDWIS facilities inventory. Methodology.
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 0–5.4 ug/LReported levelMWD Jensen Plant 98% of Supply | 10 ug/LMCL | Within the limit |
+By source (2)— MWD Jensen Plant 98% of Supply, Calleguas LBWFP 2% of Supply
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 16.9375 UG/LAverageDistribution | 80 UG/LMCL | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 4.78125 UG/LAverageDistribution | 60 UG/LMCL | Within the limit |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 4.325 UG/LAverageDistribution | None set | Detected — no federal limit |
| BromoformA trihalomethane disinfection byproduct. | 3.45625 UG/LAverageDistribution | None set | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 2.31875 UG/LAverageDistribution | None set | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 6.78125 UG/LAverageDistribution | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.6–1 mg/LReported levelMWD Jensen Plant 98% of Supply | 2 mg/LMCL | Within the limit |
| SulfateA naturally occurring mineral from rock and soil. | 102–103 mg/LReported levelCalleguas LBWFP 2% of Supply | 500 mg/LMCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
| ChlorideA naturally occurring salt compound. | 99–100 mg/LReported levelCalleguas LBWFP 2% of Supply | 500 mg/LMCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.5 mg/LReported levelMWD Jensen Plant 98% of Supply | 10 mg/LMCL | Within the limit |
+By source (2)— MWD Jensen Plant 98% of Supply, Calleguas LBWFP 2% of Supply
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 773–790 %Reported levelCalleguas LBWFP 2% of Supply | 1600 %MCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.14 NTUReported levelCalleguas LBWFP | 0.3 NTUMCL | Within the limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 410–450 mg/LReported levelCalleguas LBWFP 2% of Supply | 1000 mg/LMCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
| OdorA measure of detectable smell in the water. | 1 %Reported levelMWD Jensen Plant 98% of Supply | 3 %MCL | Within the limit |
+By source (2)— MWD Jensen Plant 98% of Supply, Calleguas LBWFP 2% of Supply
| |||
| ColorA measure of visible tint in the water. | 1 %Reported levelMWD Jensen Plant 98% of Supply | 15 %MCL | Within the limit |
+By source (2)— MWD Jensen Plant 98% of Supply, Calleguas LBWFP 2% of Supply
| |||
| AlkalinityA measure of the water's capacity to neutralize acids. | 120–130 mg/LReported levelCalleguas LBWFP | None set | Detected — no federal limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 160–165 mg/LReported levelCalleguas LBWFP | None set | Detected — no federal limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
| pHA measure of how acidic or basic the water is. | 8.1–8.3 %Reported levelCalleguas LBWFP | None set | Detected — no federal limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.6–2.8 mg/LReported levelCalleguas LBWFP | None set | Detected — no federal limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.18–1.94 mg/LReported levelMWD Jensen Plant 98% of Supply | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AluminumA common element sometimes used as a treatment coagulant. | 52–91 ug/LReported levelMWD Jensen Plant 98% of Supply | 200 ug/LMCL | Within the limit |
+By source (2)— MWD Jensen Plant 98% of Supply, Calleguas LBWFP 2% of Supply
| |||
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2–4 ug/LReported levelCalleguas LBWFP 2% of Supply | 10 ug/LMCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0–5.4 ug/LReported levelMWD Jensen Plant 98% of Supply | 15 ug/LAction level | Within the limit |
| BoronA naturally occurring element from rock and soil. | 0.27–0.28 mg/LReported levelCalleguas LBWFP | 1 mg/LNL | Within the limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
| CopperA metal that enters water from corroding household plumbing. | 0–0.2 mg/LReported levelMWD Jensen Plant 98% of Supply | 1.3 mg/LAction level | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 0–6 ug/LReported levelCalleguas LBWFP 2% of Supply | 50 ug/LMCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 0.06 mg/LReported levelCalleguas LBWFP 2% of Supply | 5 mg/LMCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 38–39 mg/LReported levelMWD Jensen Plant | None set | Detected — no federal limit |
+By source (2)— MWD Jensen Plant, Calleguas LBWFP
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 17 mg/LReported levelCalleguas LBWFP | None set | Detected — no federal limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
| PotassiumA naturally occurring mineral from rock and soil. | 4 mg/LReported levelCalleguas LBWFP | None set | Detected — no federal limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
| SodiumA naturally occurring salt component. | 86–91 mg/LReported levelCalleguas LBWFP | None set | Detected — no federal limit |
+By source (2)— Calleguas LBWFP, MWD Jensen Plant
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 2–3 pCi/LReported levelMWD Jensen Plant 98% of Supply | 20 pCi/LMCL | Within the limit |
+By source (2)— MWD Jensen Plant 98% of Supply, Calleguas LBWFP 2% of Supply
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 5.4–5.6 pCi/LReported levelCalleguas LBWFP 2% of Supply | 50 pCi/LMCL | Within the limit |
+By source (2)— Calleguas LBWFP 2% of Supply, MWD Jensen Plant 98% of Supply
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0 %Reported levelMWD Jensen Plant | 5 %MCL | None detected |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Mbaa | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| Mcaa | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| Dbaa | 2.51875 UG/LAverageDistribution | None set | Detected — no federal limit |
| Dcaa | 2.48125 UG/LAverageDistribution | None set | Detected — no federal limit |
| Tcaa | 0.70625 UG/LAverageDistribution | None set | Detected — no federal limit |
Source: City of Thousand Oaks Water Department, 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 City of Thousand Oaks Water Department, CA's water
+Is City of Thousand Oaks Water Department, CA tap water safe to drink in 2024?
Every one of the 40 contaminants measured in City of Thousand Oaks Water Department, 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 City of Thousand Oaks Water Department, CA tap water?
40 contaminants were measured in City of Thousand Oaks Water Department, CA's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 23 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 City of Thousand Oaks Water Department, 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 City of Thousand Oaks Water Department, 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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