Drinking water quality · 2024
· Verified
What's in Chandler, AZ tap water
52 contaminants were measured in the Chandler, AZ water system's 2024 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 52
- Over federal limit
- 2
- Approaching the limit
- 2
- Worst contaminant
- Lithium
- Service area
- AZ
PFAS — EPA UCMR5 (2023–2025)
5 PFAS compounds detected in Chandler, AZ
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)below national p90 (18 ng/L across detecting U.S. systems)
PFBS
● Detected (no federal limit)near national p90 (13.909999999999979 ng/L across detecting U.S. systems)
PFPeA
● Detected (no federal limit)below national p90 (15.95999999999999 ng/L across detecting U.S. systems)
Lithium
● Detected (no federal limit)4.0× the national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PFHxA
● Detected (no federal limit)below national p90 (12.190000000000003 ng/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Chandler, AZ's drinking water comes from ground water, drawn from 33 sources.
Source
- IN-U077900SI
- WL-55-506732 - RURAL WELL
- WL-55-506754 - BROOKS CROSSING WELL
- WL-55-509868 - MONTEREY WELL
- + 29 more
Treatment
- TP001 - SURFACE WATER
- TP005 - CL2
- TP002 - CL2
- + 9 more
Distribution
Also buys water from TEMPE CITY OF.
Historical readings · EPA Six-Year Review (2012–2019)
3 contaminants historically over EPA limits in Chandler, AZ
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
BROMATE worst: 2016 | 0.068 mg/L 6.8× | 0.01 mg/L | '16 |
TTHM worst: 2018 | 0.14 mg/L 1.8× | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2018 | 0.06 mg/L 1.0× | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
ARSENIC worst: 2014 | 0.0098 mg/L 98% near national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE worst: 2012 | 9.5 mg/L 95% | 10 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2012 | 9.5 mg/L 95% | 10 mg/L | '12'13'14'15'16'17'18'19 |
MERCURY worst: 2015 | 0.0013 mg/L within | 0.002 mg/L | '15 |
DEHP worst: 2012 | 0.0034 mg/L within | 0.006 mg/L | '12'18 |
RADIUM 226 228 worst: 2015 | 2.3 pCi/L within below national p90 | 5 pCi/L | '13'15'17'18 |
FLUORIDE worst: 2015 | 1.6 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
BARIUM worst: 2012 | 0.66 mg/L within 3.0× the national p90 | 2 mg/L | '12'13'14'15'16'17'18'19 |
GROSS ALPHA worst: 2012 | 3.6 pCi/L within | 15 pCi/L | '12'13'14'15'16'17'18'19 |
CHROMIUM worst: 2015 | 0.024 mg/L within 2.4× the national p90 | 0.1 mg/L | '12'14'15'17'18'19 |
SELENIUM worst: 2012 | 0.012 mg/L within | 0.05 mg/L | '12'17'18 |
BENZO A PYRENE worst: 2012 | 0.000044 mg/L within below national p90 | 0.0002 mg/L | '12'15 |
XYLENES TOTAL worst: 2016 | 0.063 mg/L within | 10 mg/L | '16'17 |
TWOFOURD worst: 2019 | 0.00034 mg/L within below national p90 | 0.07 mg/L | '12'13'18'19 |
HEXACHLOROCYCLOPENTADIENE worst: 2012 | 0.00012 mg/L within | 0.05 mg/L | '12'14 |
URANIUM worst: 2015 | 0.0076 ug/L within below national p90 | 30 ug/L | '12'13'14'15'16'17'18'19 |
DALAPON worst: 2012 | 0.012 ug/L within 2.8× the national p90 | 200 ug/L | '12'18'19 |
COPPER worst: 2013 | 0.508 mg/L near national p90 | — | '13'16'19 |
LEAD worst: 2013 | 0.005 mg/L | — | '13'16'19 |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | 0–0.43 mg/LRangeSystem-wide | 1 mg/LMCL | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1 mg/LRunning annual avgSystem-wide | 4 mg/LMRDL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 0–19 ug/LRangeSystem-wide | 100 ug/LMCL | Within the limit |
| Thallium | 0–0.15 ug/LRangeSystem-wide | 2 ug/LMCL | Within the limit |
| Cadmium | 0–0.15 ug/LRangeSystem-wide | 5 ug/LMCL | Within the limit |
| SodiumA naturally occurring salt component. | 100–240 mg/LRangeSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.9 pCi/LMaximumSystem-wide | 5 pCi/LMCL | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelNumber of Positive Samples | 0MCL | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | 0 ng/LAverageSystem-wide | 5 ng/LMCL | Within the limit |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| 4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| 6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 5 ng/LMCL | Within the limit |
| 8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 5 ng/LMCL | Within the limit |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | 0 ng/LAverageSystem-wide | 2 ng/LMCL | Within the limit |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | 0 ng/LAverageSystem-wide | 5 ng/LMCL | Within the limit |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 5 ng/LMCL | Within the limit |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 6 ng/LMCL | Within the limit |
| Nonafluoro-3,6-dioxaheptanoic acidNonafluoro-3,6-dioxaheptanoic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 20 ng/LMCL | Within the limit |
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | 0 ng/LAverageSystem-wide | 4 ng/LMCL | Within the limit |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 3 ng/LMCL | Within the limit |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 4 ng/LMCL | Within the limit |
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 4 ng/LMCL | Within the limit |
| Perfluorotetradecanoic acid (PFTeDA)Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 8 ng/LMCL | Within the limit |
| Perfluorotridecanoic acid (PFTrDA)Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 7 ng/LMCL | Within the limit |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | 0 ng/LAverageSystem-wide | 2 ng/LMCL | Within the limit |
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 0 ng/LAverageSystem-wide | 4 ng/LMCL | Within the limit |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0 ng/LAverageSystem-wide | 4 ng/LMCL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.93Running annual avgSystem-wide | None set | Detected — no federal limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.27 NTUReported levelSystem-wide | None set | Detected — no federal limit |
People also ask about Chandler, AZ's water
+Is Chandler, AZ tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Chandler, AZ water utility lists 2 contaminants at or above the federal limit: Lithium and Bromate. 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 Chandler, AZ tap water?
52 contaminants were measured in Chandler, AZ's 2024 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and disinfection byproducts. 49 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 Chandler, AZ tap water?
2 contaminants in Chandler, AZ's 2024 report sit at or above the federal limit: Lithium (21.2× the limit); Bromate (1.4× 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 Chandler, AZ tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Lithium, at 21.2× the federal threshold. It belongs to the metals family of contaminants.
+Are any contaminants in Chandler, AZ tap water approaching the federal limit?
2 contaminants are between 80% and 100% of the federal limit in this report: Arsenic and TTHM. 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 Chandler, AZ's 2024 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 Chandler, AZ'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 2024 report; a new report will replace it once the utility publishes its next annual update.