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
2.1× the limit
Service area
CA
state-level CCR
Source
Utility CCR

Physical & aggregate

ContaminantMeasuredStatus
TurbidityA measure of cloudiness from suspended particles in the water.2.1 NTUAverageNorth San José/ Alviso (SFPUC Treated Water)At or above the limit
+By source (2)North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg0.4 NTU210% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avg0.3 NTU30% of limit
TOCTotal organic carbon — a measure of organic material dissolved in the water.2 mg/LAverageEvergreen (Valley Water Treated Water)Detected — no federal limit
+By source (2)Evergreen (Valley Water Treated Water), North San José/ Alviso (SFPUC Treated Water)
  • Evergreen (Valley Water Treated Water)Zone
    avg2 mg/Lrange1.1–2.3 mg/L
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg1.5 mg/Lrange1.1–1.8 mg/L

Disinfectants

ContaminantMeasuredStatus
ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia.3 mg/LAverageNorth San José/ Alviso (SFPUC Treated Water)Within the limit
+By source (4)North San José/ Alviso (SFPUC Treated Water), Coyote Valley (Groundwater), Edenvale (Groundwater) +1 more
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg3 mg/Lrange0.06–3.7 mg/L93% of limit
  • Coyote Valley (Groundwater)Zone
    range3.7 mg/L93% of limit
  • Edenvale (Groundwater)Zone
    range3.5 mg/L88% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avg1.8 mg/Lrange0.01–3.2 mg/L80% of limit

Disinfection byproducts

ContaminantMeasuredStatus
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.35 ug/LAverageNorth San José/ Alviso (SFPUC Treated Water)Within the limit
+By source (2)North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg35 ug/Lrange15–48 ug/L80% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avg14 ug/Lrange0–23 ug/L38% of limit
TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.42 ug/LAverageEvergreen (Valley Water Treated Water)Within the limit
+By source (2)North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg40 ug/Lrange12–55 ug/L69% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avg42 ug/Lrange15–47 ug/L59% of limit
BromateA disinfection byproduct formed when bromide-containing water is treated with ozone.1.7 ug/LAverageEvergreen (Valley Water Treated Water)Within the limit

Inorganic chemicals

ContaminantMeasuredStatus
NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits.2.2 mg/LAverageEdenvale (Groundwater)Within the limit
+By source (6)North San José/ Alviso (Groundwater), Edenvale (Groundwater), Evergreen (Groundwater) +3 more
  • North San José/ Alviso (Groundwater)Zone
    avg1.7 mg/Lrange0.5–2.8 mg/L28% of limit
  • Edenvale (Groundwater)Zone
    avg2.2 mg/Lrange1.5–2.7 mg/L27% of limit
  • Evergreen (Groundwater)Zone
    avg2.2 mg/Lrange2.1–2.4 mg/L24% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avg0.5 mg/Lrange0–1 mg/L10% of limit
  • Coyote Valley (Groundwater)Zone
    avg0.6 mg/Lrange0.5–0.6 mg/L6% of limit
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avgNot detected mg/Lrange0–0.4 mg/L4% of limit
FluorideA mineral often added to drinking water to help prevent tooth decay.0.8 mg/LAverageEvergreen (Valley Water Treated Water)Within the limit
+By source (6)Evergreen (Valley Water Treated Water), North San José/ Alviso (SFPUC Treated Water), Evergreen (Groundwater) +3 more
  • Evergreen (Valley Water Treated Water)Zone
    avg0.8 mg/Lrange0.6–0.9 mg/L23% of limit
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg0.7 mg/Lrange0.5–0.8 mg/L20% of limit
  • Evergreen (Groundwater)Zone
    avg0.2 mg/Lrange0.1–0.2 mg/L5% of limit
  • Edenvale (Groundwater)Zone
    avg0.2 mg/Lrange0.2–0.2 mg/L5% of limit
  • Coyote Valley (Groundwater)Zone
    avg0.1 mg/Lrange0.1–0.1 mg/L3% of limit
  • North San José/ Alviso (Groundwater)Zone
    avgNot detected mg/LrangeNot detected mg/L0% of limit

Radionuclides

ContaminantMeasuredStatus
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.3.3 pCi/LAverageEvergreen (Valley Water Treated Water)Within the limit
+By source (6)Evergreen (Valley Water Treated Water), Edenvale (Groundwater), North San José/ Alviso (Groundwater) +3 more
  • Evergreen (Valley Water Treated Water)Zone
    avg3.3 pCi/Lrange3.3 pCi/L22% of limit
  • Edenvale (Groundwater)Zone
    avgNot detected pCi/LrangeNot detected pCi/L0% of limit
  • North San José/ Alviso (Groundwater)Zone
    avgNot detected pCi/LrangeNot detected pCi/L0% of limit
  • Coyote Valley (Groundwater)Zone
    avgNot detected pCi/LrangeNot detected pCi/L0% of limit
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avgNot detected pCi/LrangeNot detected pCi/L0% of limit
  • Evergreen (Groundwater)Zone
    avgNot detected pCi/LrangeNot detected pCi/L0% of limit

Metals

ContaminantMeasuredStatus
CopperA metal that enters water from corroding household plumbing.150 ug/L90th percentileAt the tapWithin the limit
BariumA metal from erosion of natural deposits and industrial discharge.0.2 mg/LAverageNorth San José/ Alviso (Groundwater)Within the limit
+By source (6)Evergreen (Groundwater), Edenvale (Groundwater), North San José/ Alviso (Groundwater) +3 more
  • Evergreen (Groundwater)Zone
    avg0.2 mg/Lrange0.1–0.2 mg/L10% of limit
  • Edenvale (Groundwater)Zone
    avg0.1 mg/Lrange0.1–0.2 mg/L10% of limit
  • North San José/ Alviso (Groundwater)Zone
    avg0.2 mg/Lrange0.2–0.2 mg/L10% of limit
  • Coyote Valley (Groundwater)Zone
    avg0.1 mg/Lrange0–0.1 mg/L5% of limit
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avgNot detected mg/LrangeNot detected mg/L0% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avgNot detected mg/LrangeNot detected mg/L0% of limit
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.0 ug/L90th percentileAt the tapNone detected
SeleniumA trace element from natural deposits and industrial discharge.Not detected ug/LAverageNorth San José/ Alviso (Groundwater)Within the limit
+By source (6)North San José/ Alviso (Groundwater), Evergreen (Groundwater), Evergreen (Valley Water Treated Water) +3 more
  • North San José/ Alviso (Groundwater)Zone
    avgNot detected ug/Lrange0–5 ug/L10% of limit
  • Evergreen (Groundwater)Zone
    avgNot detected ug/LrangeNot detected ug/L0% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avgNot detected ug/LrangeNot detected ug/L0% of limit
  • Edenvale (Groundwater)Zone
    avgNot detected ug/LrangeNot detected ug/L0% of limit
  • Coyote Valley (Groundwater)Zone
    avgNot detected ug/LrangeNot detected ug/L0% of limit
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avgNot detected ug/LrangeNot detected ug/L0% of limit

Other

ContaminantMeasuredStatus
Chromium5.4 ug/LAverageEdenvale (Groundwater)Within the limit
+By source (6)Edenvale (Groundwater), Evergreen (Groundwater), Coyote Valley (Groundwater) +3 more
  • Edenvale (Groundwater)Zone
    avg5.4 ug/Lrange3.8–7.4 ug/L7% of limit
  • Evergreen (Groundwater)Zone
    avg5 ug/Lrange3.1–6.1 ug/L6% of limit
  • Coyote Valley (Groundwater)Zone
    avg4.7 ug/Lrange4.6–4.8 ug/L5% of limit
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg0.1 ug/Lrange0–0.1 ug/L0% of limit
  • Evergreen (Valley Water Treated Water)Zone
    avgNot detected ug/LrangeNot detected ug/L0% of limit
  • North San José/ Alviso (Groundwater)Zone
    avgNot detected ug/LrangeNot detected ug/L0% of limit

Microbial

ContaminantMeasuredStatus
CryptosporidiumNot detectedAverageNorth San José/ Alviso (SFPUC Treated Water)Detected — no federal limit
+By source (2)Evergreen (Valley Water Treated Water), North San José/ Alviso (SFPUC Treated Water)
  • Evergreen (Valley Water Treated Water)Zone
    avgNot detectedrange0–0.1
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avgNot detectedrangeNot detected
Giardia lamblia0.02AverageNorth San José/ Alviso (SFPUC Treated Water)Detected — no federal limit
+By source (2)North San José/ Alviso (SFPUC Treated Water), Evergreen (Valley Water Treated Water)
  • North San José/ Alviso (SFPUC Treated Water)Zone
    avg0.02range0–0.06
  • Evergreen (Valley Water Treated Water)Zone
    avgNot detectedrangeNot detected
Total ColiformA group of bacteria used as an indicator of overall water-system sanitation.3RangeEvergreen (Valley Water Treated Water)Detected — no federal limit
+By source (6)Evergreen (Valley Water Treated Water), Coyote Valley (Groundwater), North San José/ Alviso (Groundwater) +3 more
  • Evergreen (Valley Water Treated Water)Zone
    range3
  • Coyote Valley (Groundwater)Zone
    range0–3
  • North San José/ Alviso (Groundwater)Zone
    range0–3
  • Edenvale (Groundwater)Zone
    range3
  • North San José/ Alviso (SFPUC Treated Water)Zone
    range3
  • Evergreen (Groundwater)Zone
    range0–3
Source: City of San Jose - Nsj/alviso — San Jose, Ca, CA's 2023 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 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.

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