Drinking water quality · 2023
· Verified
What's in California Water Service Co-lake Hughes — San Jose, Ca, CA tap water
25 contaminants were measured in the California Water Service Co-lake Hughes — San Jose, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 25
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 4 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.64 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 4 ug/LAverageSystem-wide | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | Not detected mg/LAverageSystem-wide | 2 mg/LMCL | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | Not detected mg/L90th percentileAt the tap | 1.3 mg/LAction level | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | None set | None detected |
| SeleniumA trace element from natural deposits and industrial discharge. | Not detected ug/LAverageSystem-wide | None set | Within the limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 75 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.41 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | Not detected ug/LAverageSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 24 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 3.6 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 32 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Vanadium | 4.5 ug/LAverageGroundwater | 50 ug/LNL | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 4.4 pCi/LAverageSystem-wide | 15 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 4.1 pCi/LAverageSystem-wide | 20 pCi/LMCL | 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. | 22 ug/LRunning annual avgDistribution System-Wide Highest Annual | None set | Within the limit |
+By source (2)— Distribution System-Wide Highest Annual, Distribution System-Wide
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 4.6 ug/LRunning annual avgDistribution 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 | 1.1 mg/LAverageDistribution System-Wide | 4 mg/LMCL | Within the 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 |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.2 ng/LAverageSystem-wide | None set | Detected — no federal limit |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 2.1 ng/LAverageSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 280 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 287 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.4AverageSystem-wide | None set | Detected — no federal limit |
People also ask about California Water Service Co-lake Hughes — San Jose, Ca, CA's water
+Is California Water Service Co-lake Hughes — San Jose, Ca, CA tap water safe to drink in 2023?
Every one of the 25 contaminants measured in California Water Service Co-lake Hughes — San Jose, Ca, CA's 2023 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 California Water Service Co-lake Hughes — San Jose, Ca, CA tap water?
25 contaminants were measured in California Water Service Co-lake Hughes — San Jose, Ca, CA's 2023 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 8 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 California Water Service Co-lake Hughes — San Jose, Ca, 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 California Water Service Co-lake Hughes — 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 2023 report; a new report will replace it once the utility publishes its next annual update.