Tap Water Quality Report
Tap water quality in Phoenix, Arizona
Tap water in Phoenix, Arizona receives a grade of D (62/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily Phoenix Water Authority. The most significant water quality concerns are: Lead detected in source water; Haloacetic Acids (HAA5) significantly above health guideline; Chromium-6 detected; Arsenic significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database, and Phoenix's published Consumer Confidence Report.
What's in Phoenix's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving Phoenix.
Lead detected in source water
Severe concernLead detected at 1.1 ppb. EWG considers no level of lead safe; EPA's action level is 15 ppb.
Haloacetic Acids (HAA5) significantly above health guideline
Moderate concernHaloacetic Acids (HAA5) detected at 15.0 ppb, 150x above the EWG health guideline of 0.1 ppb.
Chromium-6 detected
Moderate concernChromium-6 detected at 0.33 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.84 ppb, 710x above the EWG health guideline of 0.004 ppb.
Water systems serving Phoenix
Phoenix is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
Recommended filters for Phoenix
Filters matched to the specific contaminants in Phoenix's water supply.
NSF/ANSI 53 certified for lead removal
$80-$750NSF 53 is the gold standard certification for lead removal. Required when lead is a documented concern.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Chromium-6 requires reverse osmosis for reliable removal. Standard carbon filters do not address it.
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 |
2.84 ppb | 0.004 | 10 | 10 | 10 | 0.004 | 2023 | 710× over |
| Haloacetic Acids (HAA5) Disinfection byproduct |
15.0 ppb | 0.1 | 60 | 60 | — | — | 2023 | 150× over |
| Total Trihalomethanes (TTHMs) Disinfection byproduct |
43.4 ppb | 0.6 | 80 | 100 | — | — | 2022 | 72× over |
| Nitrate Inorganic |
4.27 mg/L | 0.14 | 10 | 11.3 | 11.3 | 10 | 2023 | 30× over |
| Chromium-6 (Hexavalent) Heavy metal |
0.593 ppb | 0.02 | — | — | — | 0.02 | 2023 | 30× over |
| Uranium Radiological |
5.22 ppb | 0.43 | 30 | 30 | 30 | 0.43 | 2023 | 12× over |
| Lead Heavy metal |
1.25 ppb | 0 | 15 | 5 | 10 | 0.2 | 2022 | — |
| Contaminant | Detected (2023) | EWG | EPA | EU DWD | WHO | CA PHG | Status |
|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
2.84 ppb | 0.004 | 10 | 10 | 10 | 0.004 | 710× over |
| Haloacetic Acids (HAA5) Disinfection byproduct |
15.0 ppb | 0.1 | 60 | 60 | — | — | 150× over |
| Nitrate Inorganic |
4.27 mg/L | 0.14 | 10 | 11.3 | 11.3 | 10 | 30× over |
| Chromium-6 (Hexavalent) Heavy metal |
0.593 ppb | 0.02 | — | — | — | 0.02 | 30× over |
| Uranium Radiological |
5.22 ppb | 0.43 | 30 | 30 | 30 | 0.43 | 12× over |
| Contaminant | Detected (2022) | EWG | EPA | EU DWD | WHO | CA PHG | Status |
|---|---|---|---|---|---|---|---|
| Total Trihalomethanes (TTHMs) Disinfection byproduct |
43.4 ppb | 0.6 | 80 | 100 | — | — | 72× over |
| Lead Heavy metal |
1.25 ppb | 0 | 15 | 5 | 10 | 0.2 | — |
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 Water Authority.
General Contact
Water Quality Contact
For questions about contaminants or test results.