What was found in Glendale'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 7350 µg/L 74% of the EPA limit 10000 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019
Highest in the city: 9810 µg/L — OLIVE AVENUE HOA · 25 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 7350 µg/L 74% of the EPA limit 10000 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019
Highest in the city: 9800 µg/L — OLIVE AVENUE HOA · 25 people · 2017 | 3/3 | SYR4 |
| Fluoride | 675 µg/L 17% of the EPA limit 4000 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019
Highest in the city: 1055 µg/L — VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2018 | 3/3 | SYR4 |
| Chlorite | 313.55 µg/L 31% of the EPA limit 1000 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019 | 1/3 | SYR4 |
| Copper | 295.15 µg/L 23% of the EPA limit 1300 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2018 | 3/3 | SYR4 |
| Barium | 129 µg/L 6.5% of the EPA limit 2000 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019
Highest in the city: 132 µg/L — VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2018 | 3/3 | SYR4 |
| Lithium | 117 µg/L No EPA limit set Main supplier: GLENDALE CITY OF · 234,766 people · 2025
Highest in the city: 130 µg/L — VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2024 | 2/3 | UCMR-5 |
| TTHM | 70 µg/L 88% of the EPA limit 80 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019 | 3/3 | SYR4 |
| Chromium | 33.815 µg/L 34% of the EPA limit 100 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19.14 µg/L 32% of the EPA limit 60 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019 | 3/3 | SYR4 |
| Selenium | 8 µg/L 16% of the EPA limit 50 µg/L Highest in the city: VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2018 | 1/3 | SYR4 |
| Arsenic | 7.57 µg/L 76% of the EPA limit 10 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019
Highest in the city: 7.7 µg/L — VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2019 | 3/3 | SYR4 |
| Lead | 7.5 µg/L 50% of the EPA limit 15 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2018 | 3/3 | SYR4 |
| Combined Uranium | 4.91 µg/L 16% of the EPA limit 30 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2017 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.91 pCi/L 13% of the EPA limit 15 pCi/L Main supplier: GLENDALE CITY OF · 234,766 people · 2017 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.6 µg/L 27% of the EPA limit 6 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.58 pCi/L 32% of the EPA limit 5 pCi/L Main supplier: GLENDALE CITY OF · 234,766 people · 2017 | 1/3 | SYR4 |
| Cadmium | 1 µg/L 20% of the EPA limit 5 µg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2019 | 1/3 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0690 µg/L 35% of the EPA limit 0.2000 µg/L Highest in the city: OLIVE AVENUE HOA · 25 people · 2019 | 1/3 | SYR4 |
| Pfpea | 0.0590 µg/L No EPA limit set Highest in the city: VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2024 | 1/3 | UCMR-5 |
| Pfhxa | 0.0520 µg/L No EPA limit set Highest in the city: VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2024 | 1/3 | UCMR-5 |
| Pfba | 0.0160 µg/L No EPA limit set Highest in the city: VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2024 | 1/3 | UCMR-5 |
| PFBS | 0.0117 µg/L No EPA limit set Main supplier: GLENDALE CITY OF · 234,766 people · 2025 | 1/3 | UCMR-5 |
| Pfhpa | 0.0100 µg/L No EPA limit set Highest in the city: VALLEY UTILITIES WATER COMPANY GLENDALE · 5,940 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: GLENDALE CITY OF · 234,766 people · 2025 | 3/3 | 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 Glendale
| Supplier | Population served |
|---|---|
| GLENDALE CITY OF | 234,766 |
| VALLEY UTILITIES WATER COMPANY GLENDALE | 5,940 |
| OLIVE AVENUE HOA | 25 |
Frequently asked questions about Glendale tap water
Is Glendale tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Glendale. 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 Glendale?
3 public water suppliers report drinking-water monitoring for Glendale, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Glendale's water?
The contaminants EPA monitoring detected in Glendale include Nitrate, Nitrate-Nitrite, Fluoride, Chlorite, Copper. 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.