Tap WaterIndex

Tap water quality report

Phoenix City of

EPA monitoring tested this supplier for 106 contaminants and detected 25. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

106
contaminants tested
25
detected
1,695,000
people served
6
health-based violations
Water source
Surface water
Ownership
Local government
Counties served
Maricopa

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

6
health-based violations
83
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2021-01-01 → 2021-01-31
TT Health-based Resolved 2021-01-01 → 2021-01-31
TT Health-based Resolved 2021-01-01 → 2021-01-31
TT Health-based Resolved 2021-01-01 → 2021-01-31
MCL Health-based Resolved 2014-08-01 → 2014-08-31
MCL Health-based Archived 1987-01-01 → 1990-07-01
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MR Monitoring Archived 2025-05-01 → 2025-05-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0160 µg/L 12/52 2023
Pfba 0.0060 µg/L 6/52 2023

Other contaminants detected

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
87 µg/L 109%
of the EPA limit, in the worst sample — 80 µg/L
 737/739 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
48 µg/L 80%
of the EPA limit 60 µg/L
 733/738 SYR4 2012–2019
Chlorite
503 µg/L 50%
of the EPA limit 1000 µg/L
 564/740 SYR4 2012–2019
Nitrate
9000 µg/L 90%
of the EPA limit 10000 µg/L
 450/484 SYR4 2012–2019
Arsenic
10.4 µg/L 104%
of the EPA limit, in the worst sample — 10 µg/L
 428/464 SYR4 2012–2019
Copper
3110 µg/L 239%
of the EPA limit, in the worst sample — 1300 µg/L
 233/233 SYR4 2012–2018
Lead
62.5 µg/L 417%
of the EPA limit, in the worst sample — 15 µg/L
 216/233 SYR4 2012–2018
Lithium
160 µg/L
No EPA limit set
 53/53 UCMR-5 2023
Combined Uranium
7.4 µg/L 25%
of the EPA limit 30 µg/L
 46/47 SYR4 2012–2019
Chromium
75.2 µg/L 75%
of the EPA limit 100 µg/L
 43/54 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
3.2 pCi/L 21%
of the EPA limit 15 pCi/L
 31/47 SYR4 2012–2019
Barium
130 µg/L 6.5%
of the EPA limit 2000 µg/L
 24/26 SYR4 2012–2019
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
 22/22 SYR4 2012–2019
Bromate
11 µg/L 110%
of the EPA limit, in the worst sample — 10 µg/L
 21/137 SYR4 2012–2019
Lead
0.0027 mg/L 18%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2024
Nitrate-Nitrite
800 µg/L 8%
of the EPA limit 10000 µg/L
 9/10 SYR4 2012–2019
Combined Radium (-226 And -228)
2.4 pCi/L 48%
of the EPA limit 5 pCi/L
 5/47 SYR4 2012–2019
Picloram
0.1900 µg/L 0%
of the EPA limit 500 µg/L
 3/134 SYR4 2012–2019
Selenium
3.4 µg/L 6.8%
of the EPA limit 50 µg/L
 3/26 SYR4 2012–2019
Xylenes, Total
1.1 µg/L 0%
of the EPA limit 10000 µg/L
 3/112 SYR4 2012–2019
2,4-D
0.3800 µg/L 0.5%
of the EPA limit 70 µg/L
 1/134 SYR4 2012–2019
Benzo(A)Pyrene
0.0400 µg/L 20%
of the EPA limit 0.2000 µg/L
 1/123 SYR4 2012–2019
Thallium, Total
0.0600 µg/L 3%
of the EPA limit 2 µg/L
 1/26 SYR4 2012–2019
81 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Phoenix City of

Is Phoenix City of tap water safe to drink?

EPA monitoring detected 25 contaminants in Phoenix City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Phoenix City of's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Chlorite, Nitrate, Arsenic, and others. The full list with the level and data source for each is above.

How many people does Phoenix City of serve?

Phoenix City of reports serving 1,695,000 people, per its EPA record.

Has Phoenix City of had any water quality violations?

The EPA has 83 violations on file for Phoenix City of, of which 6 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.