Drinking water quality · 2023
· Verified
What's in City of San Jose - Nsj/alviso — San Jose, Ca, CA tap water
17 contaminants were measured in the City of San Jose - Nsj/alviso — San Jose, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 17
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Turbidity
- Service area
- CA
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 2.1 NTUAverageNorth San José/ Alviso (SFPUC Treated Water) | 1 NTUMCL | At or above the limit |
+By source (2)— North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2 mg/LAverageEvergreen (Valley Water Treated Water) | None set | Detected — no federal limit |
+By source (2)— Evergreen (Valley Water Treated Water), North San José/ Alviso (SFPUC Treated Water)
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 3 mg/LAverageNorth San José/ Alviso (SFPUC Treated Water) | None set | Within the limit |
+By source (4)— North San José/ Alviso (SFPUC Treated Water), Coyote Valley (Groundwater), Edenvale (Groundwater) +1 more
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 35 ug/LAverageNorth San José/ Alviso (SFPUC Treated Water) | None set | Within the limit |
+By source (2)— North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 42 ug/LAverageEvergreen (Valley Water Treated Water) | None set | Within the limit |
+By source (2)— North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
| |||
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 1.7 ug/LAverageEvergreen (Valley Water Treated Water) | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2.2 mg/LAverageEdenvale (Groundwater) | 10 mg/LMCL | Within the limit |
+By source (6)— North San José/ Alviso (Groundwater), Edenvale (Groundwater), Evergreen (Groundwater) +3 more
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.8 mg/LAverageEvergreen (Valley Water Treated Water) | 4 mg/LMCL | Within the limit |
+By source (6)— Evergreen (Valley Water Treated Water), North San José/ Alviso (SFPUC Treated Water), Evergreen (Groundwater) +3 more
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.3 pCi/LAverageEvergreen (Valley Water Treated Water) | 15 pCi/LMCL | Within the limit |
+By source (6)— Evergreen (Valley Water Treated Water), Edenvale (Groundwater), North San José/ Alviso (Groundwater) +3 more
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 150 ug/L90th percentileAt the tap | 300 ug/LPublic health goal | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.2 mg/LAverageNorth San José/ Alviso (Groundwater) | 2 mg/LMCL | Within the limit |
+By source (6)— Evergreen (Groundwater), Edenvale (Groundwater), North San José/ Alviso (Groundwater) +3 more
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0 ug/L90th percentileAt the tap | 0.2 ug/LPublic health goal | None detected |
| SeleniumA trace element from natural deposits and industrial discharge. | Not detected ug/LAverageNorth San José/ Alviso (Groundwater) | None set | Within the limit |
+By source (6)— North San José/ Alviso (Groundwater), Evergreen (Groundwater), Evergreen (Valley Water Treated Water) +3 more
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 5.4 ug/LAverageEdenvale (Groundwater) | None set | Within the limit |
+By source (6)— Edenvale (Groundwater), Evergreen (Groundwater), Coyote Valley (Groundwater) +3 more
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cryptosporidium | Not detectedAverageNorth San José/ Alviso (SFPUC Treated Water) | None set | Detected — no federal limit |
+By source (2)— Evergreen (Valley Water Treated Water), North San José/ Alviso (SFPUC Treated Water)
| |||
| Giardia lamblia | 0.02AverageNorth San José/ Alviso (SFPUC Treated Water) | None set | Detected — no federal limit |
+By source (2)— North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
| |||
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 3RangeEvergreen (Valley Water Treated Water) | None set | Detected — no federal limit |
+By source (6)— Evergreen (Valley Water Treated Water), Coyote Valley (Groundwater), North San José/ Alviso (Groundwater) +3 more
| |||
People also ask about City of San Jose - Nsj/alviso — San Jose, Ca, CA's water
+Is City of San Jose - Nsj/alviso — San Jose, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the City of San Jose - Nsj/alviso — San Jose, Ca, CA water utility lists 1 contaminant at or above the federal limit: Turbidity. 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 City of San Jose - Nsj/alviso — San Jose, Ca, CA tap water?
17 contaminants were measured in City of San Jose - Nsj/alviso — San Jose, Ca, CA's 2023 Consumer Confidence Report, spanning metals, disinfection byproducts, and microbial. 7 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 City of San Jose - Nsj/alviso — San Jose, Ca, CA tap water?
One contaminant in City of San Jose - Nsj/alviso — San Jose, Ca, CA's 2023 report sits at or above the federal limit: Turbidity (2.1× 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 City of San Jose - Nsj/alviso — San Jose, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Turbidity, at 2.1× the federal threshold. It belongs to the physical & aggregate family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from City of San Jose - Nsj/alviso — 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 City of San Jose - Nsj/alviso — 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.