Drinking water quality · 2022
· Verified
What's in Cal-am Water Company - Duarte — Rosemead, Ca, CA tap water
17 contaminants were measured in the Cal-am Water Company - Duarte — Rosemead, Ca, CA water system's 2022 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2022
- Contaminants measured
- 17
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- PFOA
- Service area
- CA
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 31 ng/LAverageSystem-wide | None set | At or above the limit |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 1.3 ng/LAverageSystem-wide | None set | Within the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 2.5 ng/LAverageSystem-wide | None set | Within the limit |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 1.3 ng/LAverageSystem-wide | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.2 mg/LReported levelSystem-wide | 4 mg/LMRDLG | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2.25 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.31 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2.02 ug/LAverageSystem-wide | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 2 ug/L90th percentileAt the tap | 0.2 ug/LPublic health goal | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.13 mg/L90th percentileAt the tap | 0.3 mg/LPublic health goal | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0 mg/LAverageSystem-wide | 2 mg/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 2.4 ug/LAverageSystem-wide | None set | 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. | 14 ug/LRunning annual avgSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 2.6 ug/LRunning annual avgSystem-wide | None set | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0MaximumPercentage | 0MCLG | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 2.3MaximumPercentage | 0MCLG | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0.97 pCi/LAverageSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
People also ask about Cal-am Water Company - Duarte — Rosemead, Ca, CA's water
+Is Cal-am Water Company - Duarte — Rosemead, Ca, CA tap water safe to drink in 2022?
The 2022 Consumer Confidence Report for the Cal-am Water Company - Duarte — Rosemead, Ca, CA water utility lists 1 contaminant at or above the federal limit: PFOA. 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 Cal-am Water Company - Duarte — Rosemead, Ca, CA tap water?
17 contaminants were measured in Cal-am Water Company - Duarte — Rosemead, Ca, CA's 2022 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), 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.
+Which contaminants exceed federal limits in Cal-am Water Company - Duarte — Rosemead, Ca, CA tap water?
One contaminant in Cal-am Water Company - Duarte — Rosemead, Ca, CA's 2022 report sits at or above the federal limit: PFOA (7.8× 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 Cal-am Water Company - Duarte — Rosemead, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2022 report is PFOA, at 7.8× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Cal-am Water Company - Duarte — Rosemead, Ca, CA's 2022 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 Cal-am Water Company - Duarte — Rosemead, 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 2022 report; a new report will replace it once the utility publishes its next annual update.