Drinking water quality · 2021
· Verified
What's in Hawthorne-city Water Dept. — San Jose, Ca, CA tap water
27 contaminants were measured in the Hawthorne-city Water Dept. — San Jose, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit.
- Reporting year
- 2021
- Contaminants measured
- 27
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
state-level CCR
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 42 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. | 15 ug/LAverageWest Basin MWD | None set | Within the limit |
+By source (3)— West Basin MWD, Distribution System-Wide, Distribution System-Wide Highest Annual
| |||
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 165.5 ug/LAverageWest Basin MWD | 800 ug/LNL | Detected — no federal limit |
| HAA9 | 22 ug/LAverageWest Basin MWD | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 1.9 mg/LAverageDistribution System-Wide | 4 mg/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageWest Basin MWD | 4 mg/LMCL | Within the limit |
+By source (3)— West Basin MWD, Groundwater, Groundwater Average/
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1.2 ug/LAverageWest Basin MWD | None set | Within the limit |
+By source (2)— West Basin MWD, Groundwater Average/
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.053 mg/LAverageWest Basin MWD | 2 mg/LMCL | Within the limit |
+By source (2)— West Basin MWD, Groundwater Average/
| |||
| CopperA metal that enters water from corroding household plumbing. | Not detected mg/L90th percentileDistribution System-Wide | 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 percentileDistribution System-Wide | None set | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 109 ug/LAverageWest Basin MWD | None set | Detected — no federal limit |
+By source (2)— West Basin MWD, Groundwater Average/
| |||
| BoronA naturally occurring element from rock and soil. | 0.26 mg/LAverageGroundwater | 1 mg/LNL | Detected — no federal limit |
+By source (2)— Groundwater, West Basin MWD
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 58 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— West Basin MWD, Groundwater
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 23 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— West Basin MWD, Groundwater
| |||
| PotassiumA naturally occurring mineral from rock and soil. | 8.8 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, West Basin MWD
| |||
| SodiumA naturally occurring salt component. | 89 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— West Basin MWD, Groundwater
| |||
| Vanadium | 3.1 ug/LAverageWest Basin MWD | 50 ug/LNL | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.05 NTUMaximumWest Basin MWD | None set | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 260 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, West Basin MWD
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 236 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— West Basin MWD, Groundwater
| |||
| pHA measure of how acidic or basic the water is. | 8.2AverageWest Basin MWD | None set | Detected — no federal limit |
+By source (2)— Groundwater, West Basin MWD
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.95 mg/LAverageWest Basin MWD | None set | 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. | 0MaximumDistribution System-Wide Highest Monthly | None set | None detected |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected pCi/LAverageWest Basin MWD2 | 0.019 pCi/LPublic health goal | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 3 pCi/LAverageWest Basin MWD2 | None set | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1 pCi/LAverageWest Basin MWD2 | 20 pCi/LMCL | Detected — no federal limit |
+By source (2)— West Basin MWD2, Groundwater
| |||
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 1 ng/LAverageWest Basin MWD | None set | Detected — no federal limit |
Source: Hawthorne-city Water Dept. — San Jose, Ca, CA's 2021 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 Hawthorne-city Water Dept. — San Jose, Ca, CA's water
+Is Hawthorne-city Water Dept. — San Jose, Ca, CA tap water safe to drink in 2021?
Every one of the 27 contaminants measured in Hawthorne-city Water Dept. — San Jose, Ca, CA's 2021 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 Hawthorne-city Water Dept. — San Jose, Ca, CA tap water?
27 contaminants were measured in Hawthorne-city Water Dept. — San Jose, Ca, CA's 2021 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 9 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 Hawthorne-city Water Dept. — San Jose, Ca, CA's 2021 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 Hawthorne-city Water Dept. — 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 2021 report; a new report will replace it once the utility publishes its next annual update.
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