What was found in Chandler'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 | 6600 µg/L 66% of the EPA limit 10000 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019
Highest in the city: 9970 µg/L — CHANDLER HEIGHTS CITRUS IRRIGATION DIST · 2,620 people · 2019 | 6/6 | SYR4 |
| Nitrate-Nitrite | 6450 µg/L 65% of the EPA limit 10000 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019
Highest in the city: 6873.5 µg/L — CHANDLER HEIGHTS CITRUS IRRIGATION DIST · 2,620 people · 2018 | 5/6 | SYR4 |
| Fluoride | 1200 µg/L 30% of the EPA limit 4000 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 6/6 | SYR4 |
| Lithium | 305 µg/L No EPA limit set Main supplier: CHANDLER CITY OF · 247,328 people · 2025
Highest in the city: 381 µg/L — PIMA UTILITIES · 20,000 people · 2025 | 2/6 | UCMR-5 |
| Copper | 272.7 µg/L 21% of the EPA limit 1300 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 6/6 | SYR4 |
| Chromium | 20.1 µg/L 20% of the EPA limit 100 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019
Highest in the city: 171.36 µg/L — GREENFIELD RANCHETTES · 53 people · 2017 | 6/6 | SYR4 |
| Barium | 130 µg/L 6.5% of the EPA limit 2000 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 6/6 | SYR4 |
| TTHM | 91 µg/L 114% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 3/6 | SYR4 |
| Bromate | 63.8 µg/L 638% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2016 | 1/6 | SYR4 |
| Xylenes, Total | 61.05 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 34.2 µg/L 57% of the EPA limit 60 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 3/6 | SYR4 |
| Arsenic | 8.4 µg/L 84% of the EPA limit 10 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019
Highest in the city: 24.72 µg/L — GREENFIELD RANCHETTES · 53 people · 2019 | 6/6 | SYR4 |
| Lead | 6.175 µg/L 41% of the EPA limit 15 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019
Highest in the city: 19 µg/L — GREENFIELD RANCHETTES · 53 people · 2019 | 4/6 | SYR4 |
| Selenium | 7.695 µg/L 15% of the EPA limit 50 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019
Highest in the city: 9.59 µg/L — PIMA UTILITIES · 20,000 people · 2017 | 2/6 | SYR4 |
| Dalapon | 8.535 µg/L 4.3% of the EPA limit 200 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Combined Uranium | 5.1665 µg/L 17% of the EPA limit 30 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Bromoform | 4 µg/L No EPA limit set Highest in the city: PIMA UTILITIES · 20,000 people · 2019 | 1/6 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.2 µg/L 53% of the EPA limit 6 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.93 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Cadmium | 2.3 µg/L 46% of the EPA limit 5 µg/L Highest in the city: GREENFIELD RANCHETTES · 53 people · 2017 | 1/6 | SYR4 |
| Dibromochloromethane | 1.6 µg/L No EPA limit set Highest in the city: PIMA UTILITIES · 20,000 people · 2019 | 1/6 | SYR4 |
| Mercury | 1.3 µg/L 65% of the EPA limit 2 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Dibromoacetic Acid | 1.1 µg/L No EPA limit set Highest in the city: PIMA UTILITIES · 20,000 people · 2019 | 1/6 | SYR4 |
| Combined Radium (-226 And -228) | 1.07 pCi/L 21% of the EPA limit 5 pCi/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 2/6 | SYR4 |
| 2,4-D | 0.3200 µg/L 0.5% of the EPA limit 70 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Hexachlorocyclopentadiene | 0.1200 µg/L 0.2% of the EPA limit 50 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| Benzo(A)Pyrene | 0.0434 µg/L 22% of the EPA limit 0.2000 µg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2019 | 1/6 | SYR4 |
| PFBS | 0.0120 µg/L No EPA limit set Main supplier: CHANDLER CITY OF · 247,328 people · 2025 | 1/6 | UCMR-5 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: CHANDLER CITY OF · 247,328 people · 2025
Highest in the city: 0.0100 mg/L — PIMA UTILITIES · 20,000 people · 2025 | 6/6 | LCR |
| Pfpea | 0.0053 µg/L No EPA limit set Main supplier: CHANDLER CITY OF · 247,328 people · 2025 | 1/6 | UCMR-5 |
| Pfba | 0.0050 µg/L No EPA limit set Main supplier: CHANDLER CITY OF · 247,328 people · 2025 | 1/6 | UCMR-5 |
| Pfhxa | 0.0035 µg/L No EPA limit set Main supplier: CHANDLER CITY OF · 247,328 people · 2025 | 1/6 | UCMR-5 |
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 Chandler
| Supplier | Population served |
|---|---|
| CHANDLER CITY OF | 247,328 |
| PIMA UTILITIES | 20,000 |
| CHANDLER HEIGHTS CITRUS IRRIGATION DIST | 2,620 |
| PEEKABOO WATER COOP | 100 |
| GILBERT RIGG WELL COOP | 95 |
| GREENFIELD RANCHETTES | 53 |
Frequently asked questions about Chandler tap water
Is Chandler tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Chandler. 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 Chandler?
6 public water suppliers report drinking-water monitoring for Chandler, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Chandler's water?
The contaminants EPA monitoring detected in Chandler include Nitrate, Nitrate-Nitrite, Fluoride, Lithium, 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.