Drinking water quality · 2021
· Verified
What's in Glendora-city, Water Dept. — Glendora, Ca, CA tap water
20 contaminants were measured in the Glendora-city, Water Dept. — Glendora, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2021
- Contaminants measured
- 20
- Over federal limit
- 1
- Approaching the limit
- 1
- Worst contaminant
- Chlorine
- Service area
- CA
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.03–6.4 mg/LRangeGroundwater Sources | None set | At or above the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0–0.8 NTURangeGroundwater Sources | 1 NTUMCL | Approaching the limit |
| ColorA measure of visible tint in the water. | 0–5RangeGroundwater Sources | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 1Reported levelGroundwater Sources | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 0–7.6 ug/LRangeTreated Surface Water | None set | Within the limit |
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 9.7–58 ug/LRangeGroundwater Sources | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–14 ug/LRangeGroundwater Sources | None set | Within the limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0–2.4 ug/LRangeGroundwater Sources | None set | Detected — no federal limit |
+By source (2)— Groundwater Sources, Treated Surface Water
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–5.1 mg/LRangeGroundwater Sources | 10 mg/LMCL | Within the limit |
+By source (2)— Groundwater Sources, Treated Surface Water
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.6–0.8 mg/LRangeTreated Surface Water | 4 mg/LMCL | Within the limit |
+By source (2)— Treated Surface Water, Groundwater Sources
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.44 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. | 5 ug/L90th percentileAt the tap | None set | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–3.1 ug/LRangeGroundwater Sources | None set | Within the limit |
+By source (2)— Groundwater Sources, Treated Surface Water
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 0–0.3 mg/LRangeGroundwater Sources | 2 mg/LMCL | Within the limit |
+By source (2)— Groundwater Sources, Treated Surface Water
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 0.058–0.24 mg/LRangeTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Groundwater Sources
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–3.7 pCi/LRangeGroundwater Sources | 15 pCi/LMCL | Within the limit |
+By source (2)— Groundwater Sources, Treated Surface Water
| |||
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0–1 pCi/LRangeTreated Surface Water | 5 pCi/LMCL | Within the limit |
+By source (2)— Treated Surface Water, Groundwater Sources
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 4–7 pCi/LRangeTreated Surface Water | None set | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1–3 pCi/LRangeTreated Surface Water | 20 pCi/LMCL | Detected — no federal limit |
+By source (2)— Treated Surface Water, Groundwater Sources
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 1Highest single sampleNumber of Detections | 0MCLG | Detected — no federal limit |
People also ask about Glendora-city, Water Dept. — Glendora, Ca, CA's water
+Is Glendora-city, Water Dept. — Glendora, Ca, CA tap water safe to drink in 2021?
The 2021 Consumer Confidence Report for the Glendora-city, Water Dept. — Glendora, Ca, CA water utility lists 1 contaminant at or above the federal limit: Chlorine. 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 Glendora-city, Water Dept. — Glendora, Ca, CA tap water?
20 contaminants were measured in Glendora-city, Water Dept. — Glendora, Ca, CA's 2021 Consumer Confidence Report, spanning metals, disinfection byproducts, and radionuclides. 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 Glendora-city, Water Dept. — Glendora, Ca, CA tap water?
One contaminant in Glendora-city, Water Dept. — Glendora, Ca, CA's 2021 report sits at or above the federal limit: Chlorine (1.6× 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 Glendora-city, Water Dept. — Glendora, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2021 report is Chlorine, at 1.6× the federal threshold. It belongs to the disinfectants family of contaminants.
+Are any contaminants in Glendora-city, Water Dept. — Glendora, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Turbidity. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Glendora-city, Water Dept. — Glendora, 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 Glendora-city, Water Dept. — Glendora, 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.