Drinking water quality · 2023
· Verified
What's in Del Rio Mutual — El Monte, Ca, CA tap water
27 contaminants were measured in the Del Rio Mutual — El Monte, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 27
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- PFOS
- Service area
- CA
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 11.27 ng/LAverageSource water | 4 ng/LMCL | At or above the limit |
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 8.975 ng/LAverageSource water | 4 ng/LMCL | At or above the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 4.875 ng/LAverageSource water | 10 ng/LMCL | Within the limit |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 10.925 ng/LAverageSource water | None set | Detected — no federal limit |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 3.2 ng/LAverageSource water | None set | Detected — no federal limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 9.6 ng/LAverageSource water | None set | Detected — no federal limit |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 11.25 ng/LAverageSource water | None set | Detected — no federal limit |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 12 ng/LAverageSource water | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 3.15 mg/LAverageSource water | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.2 mg/LAverageSource water | 4 mg/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 120 mg/LAverageSource water | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 150 mg/LAverageSource water | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.37 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1.8 ug/LAverageSource water | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.87 ug/L90th percentileAt the tap | None set | Within the limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 1 ug/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 78 mg/LAverageSource water | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.239 pCi/LAverageSource water | 5 pCi/LMCL | Within the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0 pCi/LAverageSource water | 15 pCi/LMCL | None detected |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.9 pCi/LAverageSource water | 20 pCi/LMCL | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Highest single sampleMonthly Number Of Positives | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0Highest single sampleMonthly Number Of Positives | None set | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0 NTUAverageSource water | 1 NTUMCL | None detected |
| HardnessA measure of dissolved calcium and magnesium minerals. | 330 mg/LAverageSource water | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 1AverageSource water | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1000AverageSource water | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 600 mg/LAverageSource water | None set | Detected — no federal limit |
People also ask about Del Rio Mutual — El Monte, Ca, CA's water
+Is Del Rio Mutual — El Monte, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Del Rio Mutual — El Monte, Ca, CA water utility lists 2 contaminants at or above the federal limit: PFOS and 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 Del Rio Mutual — El Monte, Ca, CA tap water?
27 contaminants were measured in Del Rio Mutual — El Monte, Ca, CA's 2023 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and physical & aggregate. 10 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 Del Rio Mutual — El Monte, Ca, CA tap water?
2 contaminants in Del Rio Mutual — El Monte, Ca, CA's 2023 report sit at or above the federal limit: PFOS (2.8× the limit); PFOA (2.2× 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 Del Rio Mutual — El Monte, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is PFOS, at 2.8× 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 Del Rio Mutual — El Monte, 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 Del Rio Mutual — El Monte, 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.