Drinking water quality · 2021
· Verified
What's in Del Rio Mutual — El Monte, Ca, CA tap water
22 contaminants were measured in the Del Rio Mutual — El Monte, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2021
- Contaminants measured
- 22
- Over federal limit
- 2
- 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. | 11.5 ng/LAverageSystem-wide | 4 ng/LMCL | At or above the limit |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 10.5 ng/LAverageSystem-wide | 4 ng/LMCL | At or above the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 5.17 ng/LAverageSystem-wide | 10 ng/LMCL | Within the limit |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 6.37 ng/LAverageSystem-wide | None set | Detected — no federal limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 7.4 ng/LAverageSystem-wide | 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. | 2.1 ug/LAverageSystem-wide | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.00087 mg/L90th percentileAt the tap | None set | Within the limit |
| SodiumA naturally occurring salt component. | 73.5 mg/LAverageSystem-wide | 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. | 0.86 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.19 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 105 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 130 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.05 NTUAverageSystem-wide | 1 NTUMCL | Within the limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 304.5 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 1AverageSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 995AverageSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 605 mg/LAverageSystem-wide | 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/LAverageSystem-wide | 5 pCi/LMCL | Within the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0 pCi/LRangeSystem-wide | 15 pCi/LMCL | None detected |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.9 pCi/LAverageSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0MaximumMonthly Number Of Positives | None set | None detected |
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 2021?
The 2021 Consumer Confidence Report for the Del Rio Mutual — El Monte, Ca, CA water utility lists 2 contaminants at or above the federal limit: PFOA and PFOS. 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?
22 contaminants were measured in Del Rio Mutual — El Monte, Ca, CA's 2021 Consumer Confidence Report, spanning pfas ("forever chemicals"), physical & aggregate, and inorganic chemicals. 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 2021 report sit at or above the federal limit: PFOA (2.9× the limit); PFOS (2.6× 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 2021 report is PFOA, at 2.9× 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 2021 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 2021 report; a new report will replace it once the utility publishes its next annual update.