Tap Water Quality Report
Tap water quality in Phoenix, Arizona
Tap water in Phoenix, Arizona receives a grade of D (67/100) from TapWaterSafety.org. It's served by PHOENIX CITY OF. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Phoenix's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Phoenix.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 4.1 ppb, 1026x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 19.0 ppb, 316x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 39.1 ppb, 260x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for PHOENIX CITY OF (system ID AZ0407025) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Surface Water Treatment Rule | Missed testing or reporting | 05/01/2025 | Open |
| Revised Total Coliform Rule | Missed testing | 05/01/2025 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for Phoenix
Filters matched to the specific contaminants in Phoenix's water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in Phoenix's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
4.1 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1026× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
19.0 ppb | 0.06 | — | — | — | — | — | 316× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
39.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 260× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
11.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 116× over |
| Chromium (hexavalent) Heavy metal |
0.408 ppb | 0.02 | — | — | — | — | — | 20× over |
| Nitrate Inorganic |
1.58 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 11× over |
| Chlorite Disinfection byproduct |
130.8 ppb | 50.0 | 1000.0 | — | — | — | — | 2.6× over |
| Uranium Radiological |
1.11 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.6× over |
| Radium, combined (-226 and -228) Radiological |
0.05 pCi/L | 0.05 | 5.0 | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
158.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
25.3 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Molybdenum Other |
2.71 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
34.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Di(2-ethylhexyl) phthalate Semi-volatile organic compound |
0.0163 ppb | 3.0 | 6.0 | — | — | — | — | Below guideline |
| Vanadium Other |
0.0917 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.0984 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
2.64 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.596 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.642 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
10.3 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.507 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.0679 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
70.2 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from PHOENIX CITY OF.
General Contact
Treatment Plant
ZIP codes served
Phoenix's public water systems serve the following ZIP codes: