Drinking water quality · 2023
· Verified
What's in Alameda County Water District — Fremont, Ca, CA tap water
11 contaminants were measured in the Alameda County Water District — Fremont, 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
- 11
- 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 NTUAveragePurchased San Francisco Water | None set | At or above the limit |
+By source (2)— Purchased San Francisco Water, Treated Surface Water
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0–0.86 mg/LAveragePurchased San Francisco Water | 4 mg/LMCL | Within the limit |
+By source (4)— Blended Water, Purchased San Francisco Water, Desalinated Water +1 more
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.42 mg/LAverageDesalinated Water | 10 mg/LMCL | Within the limit |
+By source (4)— Blended Water, Desalinated Water, Treated Surface Water +1 more
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.1 mg/L90th percentileAt the tap | 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 percentileAt the tap | None set | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 0.42 mg/LAverageDesalinated Water | 10 mg/LMCL | Within the limit |
+By source (4)— Blended Water, Desalinated Water, Treated Surface Water +1 more
| |||
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LAverageBlended Water | 10 ng/LMCL | Within the limit |
+By source (4)— Blended Water, Desalinated Water, Purchased San Francisco Water +1 more
| |||
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | Not detected ng/LAverageBlended Water | 4 ng/LMCL | Within the limit |
+By source (4)— Blended Water, Desalinated Water, Treated Surface Water +1 more
| |||
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | Not detected ng/LAverageDesalinated Water | 4 ng/LMCL | Within the limit |
+By source (4)— Blended Water, Desalinated Water, Purchased San Francisco Water +1 more
| |||
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LAverageBlended Water | 2 ng/LPublic health goal | Detected — no federal limit |
+By source (4)— Blended Water, Treated Surface Water, Desalinated Water +1 more
| |||
| PFAS | 0.05AverageDesalinated Water | None set | Detected — no federal limit |
+By source (4)— Desalinated Water, Blended Water, Treated Surface Water +1 more
| |||
People also ask about Alameda County Water District — Fremont, Ca, CA's water
+Is Alameda County Water District — Fremont, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Alameda County Water District — Fremont, 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 Alameda County Water District — Fremont, Ca, CA tap water?
11 contaminants were measured in Alameda County Water District — Fremont, Ca, CA's 2023 Consumer Confidence Report, spanning pfas ("forever chemicals"), inorganic chemicals, and metals. 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.
+Which contaminants exceed federal limits in Alameda County Water District — Fremont, Ca, CA tap water?
One contaminant in Alameda County Water District — Fremont, 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 Alameda County Water District — Fremont, 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 Alameda County Water District — Fremont, 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 Alameda County Water District — Fremont, 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.