Drinking water quality · 2023
· Verified
What's in San Gabriel Valley Water Co-montebello 1 — El Monte, Ca, CA tap water
35 contaminants were measured in the San Gabriel Valley Water Co-montebello 1 — El Monte, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 35
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
state-level CCR
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
No federal drinking-water violations on record for this system.
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.09 mg/LAveragePurchased Surface Water | None set | Within the limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 40.3 ug/LAveragePurchased Surface Water | None set | Within the limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 2 ug/LAveragePurchased Surface Water | 0.1 ug/LPublic health goal | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 6 ug/LAveragePurchased Surface Water | None set | Within the limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected ug/LRangeSystem-wide | 1 ug/LPublic health goal | None detected |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 80 ug/LAveragePurchased Surface Water | 800 ug/LNL | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 330 ug/L90th percentileAt the tap | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.6 ug/LAverageSystem-wide | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 124 ug/LAverageSystem-wide | 2 ug/LPublic health goal | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected ug/LRangeSystem-wide | 0.004 ug/LPublic health goal | None detected |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | Not detected ug/LRangeSystem-wide | 0.02 ug/LPublic health goal | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 93 ug/LAverageSystem-wide | 600 ug/LPublic health goal | Detected — no federal limit |
| BoronA naturally occurring element from rock and soil. | 140 ug/LAveragePurchased Surface Water | 1000 ug/LNL | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 70.15 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, Purchased Surface Water
| |||
| LithiumA naturally occurring element found in some groundwater. | 40 ug/LAveragePurchased Surface Water | None set | Detected — no federal limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 26 mg/LAveragePurchased Surface Water | None set | Detected — no federal limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
| PotassiumA naturally occurring mineral from rock and soil. | 5 mg/LAveragePurchased Surface Water | None set | Detected — no federal limit |
+By source (2)— Groundwater, Purchased Surface Water
| |||
| SodiumA naturally occurring salt component. | 105 mg/LAveragePurchased Surface Water | None set | Detected — no federal limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageSystem-wide | 1 mg/LPublic health goal | Within the limit |
| Dibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 0.43 ug/LAverageGroundwater | None set | Within the limit |
| Bromochloroacetic acidA mixed-halogen haloacetic acid disinfection byproduct. | Not detected ug/LAverageGroundwater | None set | Within the limit |
| Chlorodibromoacetic acidA brominated haloacetic acid disinfection byproduct. | Not detected ug/LAverageGroundwater | None set | Within the limit |
| Dichloroacetic acidA haloacetic acid disinfection byproduct. | Not detected ug/LAverageGroundwater | None set | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detected mg/LRangeSystem-wide | 10 mg/LPublic health goal | None detected |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0 %MaximumPercentage of Positive Samples Collected | 0 %Public health goal | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0 %MaximumPercentage of Positive Samples Collected | 0 %Public health goal | None detected |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected pCi/LRangeSystem-wide | 0.019 pCi/LPublic health goal | None detected |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | Not detected pCi/LRangeSystem-wide | 0 pCi/LPublic health goal | None detected |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | Not detected pCi/LAverageSystem-wide | 0 pCi/LPublic health goal | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | Not detected pCi/LAverageSystem-wide | 0.43 pCi/LPublic health goal | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 190.65 mg/LAverageGroundwater | None set | Detected — no federal limit |
+By source (2)— Groundwater, Purchased Surface Water
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 272 mg/LAveragePurchased Surface Water | None set | Detected — no federal limit |
+By source (2)— Groundwater, Purchased Surface Water
| |||
| pHA measure of how acidic or basic the water is. | 8.2AveragePurchased Surface Water | None set | Detected — no federal limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.4 mg/LAveragePurchased Surface Water | None set | Detected — no federal limit |
+By source (2)— Purchased Surface Water, Groundwater
| |||
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Dichlorodifluoromethane | Not detected ug/LAverageGroundwater | 1000 ug/LNL | Detected — no federal limit |
+By source (2)— Groundwater, Purchased Surface Water
| |||
Source: San Gabriel Valley Water Co-montebello 1 — El Monte, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about San Gabriel Valley Water Co-montebello 1 — El Monte, Ca, CA's water
+Is San Gabriel Valley Water Co-montebello 1 — El Monte, Ca, CA tap water safe to drink in 2023?
Every one of the 35 contaminants measured in San Gabriel Valley Water Co-montebello 1 — El Monte, 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 San Gabriel Valley Water Co-montebello 1 — El Monte, Ca, CA tap water?
35 contaminants were measured in San Gabriel Valley Water Co-montebello 1 — El Monte, Ca, CA's 2023 Consumer Confidence Report, spanning metals, inorganic chemicals, and disinfection byproducts. 17 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 San Gabriel Valley Water Co-montebello 1 — 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 San Gabriel Valley Water Co-montebello 1 — 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.
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