Drinking water quality · 2023
· Verified
What's in Cwsc Las Lomas — San Jose, Ca, CA tap water
19 contaminants were measured in the Cwsc Las Lomas — San Jose, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 19
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Free | 0.82 mg/LAverageDistribution System-Wide | 4 mg/LMCL | Within the limit |
| Chromium | 15 ug/LAverageGroundwater | None set | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.11 mg/L90th percentileDistribution System-Wide | 1.3 mg/LAction level | Within the limit |
| 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. | 0.26 mg/LAverageGroundwater | 1 mg/LNL | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 42 mg/LAverageGroundwater | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 2.6 ug/LAverageGroundwater | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 37 mg/LAverageGroundwater | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 2.6 mg/LAverageGroundwater | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 47 mg/LAverageGroundwater | None set | Detected — no federal limit |
| Vanadium | 4.7 ug/LAverageGroundwater | 50 ug/LNL | 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. | 4.7 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. | Not detected ug/LRangeDistribution System-Wide | None set | None detected |
+By source (2)— Distribution System-Wide, Distribution System-Wide Highest Annual
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.11 mg/LAverageGroundwater | 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. | 0MaximumDistribution System-Wide Highest Monthly | None set | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 240 mg/LAverageGroundwater | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 259 mg/LAverageGroundwater | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.7AverageGroundwater | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.6 pCi/LAverageGroundwater | 20 pCi/LMCL | Detected — no federal limit |
People also ask about Cwsc Las Lomas — San Jose, Ca, CA's water
+Is Cwsc Las Lomas — San Jose, Ca, CA tap water safe to drink in 2023?
Every one of the 19 contaminants measured in Cwsc Las Lomas — 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 Cwsc Las Lomas — San Jose, Ca, CA tap water?
19 contaminants were measured in Cwsc Las Lomas — San Jose, Ca, CA's 2023 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 6 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 Cwsc Las Lomas — 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 Cwsc Las Lomas — 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.