Drinking water quality · 2020
· Verified
What's in California Water Service Co-leona Valley — San Jose, Ca, CA tap water
22 contaminants were measured in the California Water Service Co-leona Valley — San Jose, Ca, CA water system's 2020 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2020
- Contaminants measured
- 22
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Asbestos
- Service area
- CA
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Asbestos | 9.5 MFLAverageGroundwater | 7 MFLMCL | At or above the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 3 mg/LAverageGroundwater | 10 mg/LMCL | Within the limit |
+By source (2)— Groundwater, Surface Water
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.31 mg/LAverageGroundwater | 4 mg/LMCL | Within the limit |
+By source (2)— Groundwater, Surface Water
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 44 ug/LAverageDistribution System-Wide Highest Annual | None set | Within the limit |
+By source (2)— Distribution System-Wide, Distribution System-Wide Highest Annual
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 14 ug/LAverageDistribution System-Wide Highest Annual | None set | Within the limit |
+By source (2)— Distribution System-Wide, Distribution System-Wide Highest Annual
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Free | 0.96 mg/LAverageDistribution System-Wide | 4 mg/LMCL | Within the limit |
| Chromium | 1.4 ug/LAverageGroundwater | 0.02 ug/LPublic health goal | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.26 mg/L90th percentileDistribution System-Wide | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | Not detected mg/LAverageGroundwater | 2 mg/LMCL | Within the limit |
+By source (2)— Groundwater, Surface Water
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileDistribution System-Wide | None set | None detected |
| BoronA naturally occurring element from rock and soil. | Not detected mg/LAverageGroundwater | 1 mg/LNL | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 71 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, Avek
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 26 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, Avek
| |||
| PotassiumA naturally occurring mineral from rock and soil. | 1.3 mg/LAverageGroundwater | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 60 mg/LAverageAvek | None set | Detected — no federal limit |
+By source (2)— Avek, Groundwater
| |||
| Vanadium | 5.6 ug/LAverageGroundwater | 50 ug/LNL | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0MaximumMonthly | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0MaximumMonthly | None set | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 178 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, Avek
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 284 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, Avek
| |||
| pHA measure of how acidic or basic the water is. | 7.5AverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, Avek
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 2.1 pCi/LAverageGroundwater | 20 pCi/LMCL | Detected — no federal limit |
People also ask about California Water Service Co-leona Valley — San Jose, Ca, CA's water
+Is California Water Service Co-leona Valley — San Jose, Ca, CA tap water safe to drink in 2020?
The 2020 Consumer Confidence Report for the California Water Service Co-leona Valley — San Jose, Ca, CA water utility lists 1 contaminant at or above the federal limit: Asbestos. 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 California Water Service Co-leona Valley — San Jose, Ca, CA tap water?
22 contaminants were measured in California Water Service Co-leona Valley — San Jose, Ca, CA's 2020 Consumer Confidence Report, spanning metals, inorganic chemicals, and physical & aggregate. 10 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 California Water Service Co-leona Valley — San Jose, Ca, CA tap water?
One contaminant in California Water Service Co-leona Valley — San Jose, Ca, CA's 2020 report sits at or above the federal limit: Asbestos (1.4× 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 California Water Service Co-leona Valley — San Jose, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2020 report is Asbestos, at 1.4× the federal threshold. It belongs to the inorganic chemicals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from California Water Service Co-leona Valley — San Jose, Ca, CA's 2020 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 California Water Service Co-leona Valley — San Jose, Ca, 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 2020 report; a new report will replace it once the utility publishes its next annual update.