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Tap water quality report

Glendora, CA

EPA monitoring detected 16 contaminants across the 1 water supplier serving Glendora. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
49,934
people served
16
contaminants found
California rankings Lead in California PFAS in California

What was found in Glendora's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
9100 µg/L 91%
of the EPA limit 10000 µg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Fluoride
451.99999999999994 µg/L 11%
of the EPA limit 4000 µg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Barium
282 µg/L 14%
of the EPA limit 2000 µg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
TTHM
47 µg/L 59%
of the EPA limit 80 µg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Bromoform
25 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Dibromochloromethane
17 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Chloroform
14 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
13.349999999999994 µg/L 22%
of the EPA limit 60 µg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Trichloroacetic Acid
12.399999999999999 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Bromodichloromethane
10.799999999999983 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Dichloroacetic Acid
9.95 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Dibromoacetic Acid
7.519999999999999 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Combined Uranium
3.278 µg/L 11%
of the EPA limit 30 µg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Arsenic
3.065 µg/L 31%
of the EPA limit 10 µg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.3549999999999998 µg/L
No EPA limit set
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2019
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: GLENDORA-CITY, WATER DEPT. · 49,934 people · 2025
1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Glendora

SupplierPopulation served
GLENDORA-CITY, WATER DEPT. 49,934

Frequently asked questions about Glendora tap water

Is Glendora tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Glendora. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Glendora?

1 public water supplier report drinking-water monitoring for Glendora, California to the EPA. Each is listed above with its population served.

What contaminants are in Glendora's water?

The contaminants EPA monitoring detected in Glendora include Nitrate, Fluoride, Barium, TTHM, Bromoform. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.