Drinking water quality · 2024
· Verified
What's in Ventura Wwd No. 8 - Simi Valley, CA tap water
114 contaminants were measured in the Ventura Wwd No. 8 - Simi Valley, CA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 114
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
state-level CCR
Approaching the limit (≥ 80%)
Where your water comes from · EPA SDWIS
Ventura Wwd No. 8 - Simi Valley, CA's drinking water comes from ground water, drawn from 3 sources.
Source
3ground water
- WELL · 3
Treatment
1treatment plant
- TAPO CANYON MEMBRANE TP
Distribution
0storage units
Also buys water from CALLEGUAS MUNICIPAL WATER DIST.
Source: EPA SDWIS facilities inventory. Methodology.
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 832.5 MG/LAverageSource water | 1000 MG/LMCL | Approaching the limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1090.8333333333333 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | Within the limit |
| ColorA measure of visible tint in the water. | 3 UNITSAverageSource water | 15 UNITSMCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.1 NTUAverageEntry point | 5 NTUMCL | Within the limit |
| OdorA measure of detectable smell in the water. | Not detected TONHighest single sampleSource water | 3 TONMCL | None detected |
| AlkalinityA measure of the water's capacity to neutralize acids. | 170 MG/LAverageSource water | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 528.25 MG/LAverageSource water | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.285384615384615 PHAverageEntry point | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.7 mg/LAverageCalleguas Lake Bard Water Filtration Plant | None set | Detected — no federal limit |
+By source (3)— Calleguas Lake Bard Water Filtration Plant, Metropolitan Jensen Plant, Tapo Canyon Water Treatment Plant
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 343.3333333333333 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.69 MG/LAverageEntry point | 10 MG/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 27 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| Cyanide | Not detected UG/LHighest single sampleEntry point | 150 UG/LMCL | None detected |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | Not detected MG/LHighest single sampleEntry point | 2 MG/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 |
|---|---|---|---|
| SeleniumA trace element from natural deposits and industrial discharge. | 24 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2.5 UG/LAverageSource water | 10 UG/LMCL | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 61 UG/LAverageEntry point | 1000 UG/LMCL | Within the limit |
| ManganeseA naturally occurring metal from soil and rock. | 2.7 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.11349999999999999 UG/LAverageEntry point | 10 UG/LMCL | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 0.09 ug/LAverageTapo Canyon Water Treatment Plant | 10 ug/LMCL | Within the limit |
+By source (3)— Tapo Canyon Water Treatment Plant, Metropolitan Jensen Plant, Calleguas Lake Bard Water Filtration Plant
| |||
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 11 UG/LAverageEntry point | 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 sampleEntry point | 6 UG/LMCL | None detected |
| BariumA metal from erosion of natural deposits and industrial discharge. | Not detected UG/LHighest single sampleEntry point | 1000 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleEntry point | 4 UG/LMCL | None detected |
| Cadmium | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| IronA naturally occurring metal common in groundwater. | Not detected UG/LHighest single sampleSource water | 300 UG/LMCL | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected UG/LHighest single sampleEntry point | 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 sampleEntry point | 8 PCI/LMCL | None detected |
| Thallium | Not detected UG/LHighest single sampleEntry point | 2 UG/LMCL | None detected |
| BoronA naturally occurring element from rock and soil. | 170 UG/LAverageEntry point | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 144.6153846153846 MG/LAverageSource water | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 33.766666666666666 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 1.4 MG/LAverageEntry point | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 43 MG/LAverageSource water | None set | Detected — no federal limit |
| Vanadium | 4.3 UG/LAverageEntry point | 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. | 6.3149999999999995 PCI/LAverageSource water | 15 PCI/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 4.2 PCI/LAverageEntry point | 20 PCI/LMCL | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | Not detected PCI/LHighest single sampleEntry point | 50 PCI/LMCL | None detected |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.6405 PCI/LAverageEntry point | None set | Detected — no federal limit |
| RadonA naturally occurring radioactive gas that can dissolve into groundwater. | 390.5 PCI/LAverageEntry point | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 17.675 UG/LAverageDistribution | 80 UG/LMCL | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 5.728125 UG/LAverageDistribution | 60 UG/LMCL | Within the limit |
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | Not detected UG/LHighest single sampleEntry point | 10 UG/LMCL | None detected |
| N-Nitrosodi-n-butylamine | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| NDMA | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected UG/LHighest single sampleEntry point | 6 UG/LMCL | None detected |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 4.94375 UG/LAverageDistribution | None set | Detected — no federal limit |
| BromoformA trihalomethane disinfection byproduct. | 2.875 UG/LAverageDistribution | None set | Detected — no federal limit |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 57 UG/LAverageEntry point | None set | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 2.95625 UG/LAverageDistribution | None set | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 6.8875 UG/LAverageDistribution | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 0.69 MG/LAverageEntry point | 10 MG/LMCL | Within the limit |
| Carbofuran | Not detected UG/LHighest single sampleEntry point | 18 UG/LMCL | None detected |
| Carbon Tetrachloride | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Chlordane | Not detected UG/LHighest single sampleEntry point | 0.1 UG/LMCL | None detected |
| Chlorobenzene | Not detected UG/LHighest single sampleEntry point | 70 UG/LMCL | None detected |
| Chromium | Not detected UG/LHighest single sampleEntry point | 50 UG/LMCL | None detected |
| Cis Dichloroethylene 12 | Not detected UG/LHighest single sampleEntry point | 6 UG/LMCL | None detected |
| Deha | Not detected UG/LHighest single sampleEntry point | 400 UG/LMCL | None detected |
| Dehp | Not detected UG/LHighest single sampleEntry point | 4 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Dichloroethylene 11 | Not detected UG/LHighest single sampleEntry point | 6 UG/LMCL | None detected |
| Dichloropropane 12 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Dinoseb | Not detected UG/LHighest single sampleEntry point | 7 UG/LMCL | None detected |
| Diquat | Not detected UG/LHighest single sampleEntry point | 20 UG/LMCL | None detected |
| Edb | Not detected UG/LHighest single sampleEntry point | 0.05 UG/LMCL | None detected |
| Endothall | Not detected UG/LHighest single sampleEntry point | 100 UG/LMCL | None detected |
| Endrin | Not detected UG/LHighest single sampleEntry point | 2 UG/LMCL | None detected |
| Glyphosate | Not detected UG/LHighest single sampleEntry point | 700 UG/LMCL | None detected |
| Heptachlor | Not detected UG/LHighest single sampleEntry point | 0.01 UG/LMCL | None detected |
| Heptachlor Epoxide | Not detected UG/LHighest single sampleEntry point | 0.01 UG/LMCL | None detected |
| Hexachlorobenzene | Not detected UG/LHighest single sampleEntry point | 1 UG/LMCL | None detected |
| Hexachlorocyclopentadiene | Not detected UG/LHighest single sampleEntry point | 50 UG/LMCL | None detected |
| Mbaa | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| Mcaa | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| Methoxychlor | Not detected UG/LHighest single sampleEntry point | 30 UG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleEntry point | 600 UG/LMCL | None detected |
| Oxamyl | Not detected UG/LHighest single sampleEntry point | 50 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Pcb Total | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Pce | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Pentachlorophenol | Not detected UG/LHighest single sampleEntry point | 1 UG/LMCL | None detected |
| Picloram | Not detected UG/LHighest single sampleEntry point | 500 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleEntry point | 100 UG/LMCL | None detected |
| Tce | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Toxaphene | Not detected UG/LHighest single sampleEntry point | 3 UG/LMCL | None detected |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleEntry point | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleEntry point | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Twofourd | Not detected UG/LHighest single sampleEntry point | 70 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Dbaa | 2.690625 UG/LAverageDistribution | None set | Detected — no federal limit |
| Dcaa | 2.94375 UG/LAverageDistribution | None set | Detected — no federal limit |
| Tcaa | 1.0125 UG/LAverageDistribution | 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. | 0 %Highest single sampleSystem-wide | 5 %MCL | 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 sampleEntry point | 1 UG/LMCL | None detected |
| Benzene | Not detected UG/LHighest single sampleEntry point | 1 UG/LMCL | None detected |
| Benzo(a)pyrene | Not detected UG/LHighest single sampleEntry point | 0.2 UG/LMCL | None detected |
| ChloroethaneA volatile organic compound used in some industrial processes. | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| Chloromethane | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| Dalapon | Not detected UG/LHighest single sampleEntry point | 200 UG/LMCL | None detected |
| Dichlorodifluoromethane | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| Dichloromethane | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleEntry point | 300 UG/LMCL | None detected |
| Simazine | Not detected UG/LHighest single sampleEntry point | 4 UG/LMCL | None detected |
| Toluene | Not detected UG/LHighest single sampleEntry point | 150 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleEntry point | 1750 UG/LMCL | None detected |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.3–2.8 mg/LAverageMetropolitan Jensen Plant | None set | Detected — no federal limit |
+By source (3)— WWD8 System Wide, Tapo Canyon Water Treatment Plant, Metropolitan Jensen Plant
| |||
Source: Ventura Wwd No. 8 - Simi Valley, 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 Ventura Wwd No. 8 - Simi Valley, CA's water
+Is Ventura Wwd No. 8 - Simi Valley, CA tap water safe to drink in 2024?
Every one of the 114 contaminants measured in Ventura Wwd No. 8 - Simi Valley, 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 Ventura Wwd No. 8 - Simi Valley, CA tap water?
114 contaminants were measured in Ventura Wwd No. 8 - Simi Valley, CA's 2024 Consumer Confidence Report, spanning other, metals, and vocs & pesticides. 85 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Ventura Wwd No. 8 - Simi Valley, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Total Dissolved Solids. 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 Ventura Wwd No. 8 - Simi Valley, 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 Ventura Wwd No. 8 - Simi Valley, 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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