Phoenix City of Water Quality (Arizona) – 2025 Report Results

We read 25 results from Phoenix City of’s 2025 water quality report. No results over a legal limit; 8 above a health goal or guideline.

Serves about 1,695,000 people · Water system ID AZ0407025 · Read the district’s 2025 report (opens in a new tab)

Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.

Results from the 2025 report

Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.

Contaminant	Result	Health goal	Legal limit	What it means
Arsenichighest running annual average · range ND to 8.5 · Entry points (wells and plants) · 2025 report, page 6	7 ppb	0.004 ppb	10 ppb	Above the health goal1,750x the health goal
Chloritehighest quarterly average · range ND to 0.7 · Entry points and distribution · 2025 report, page 3	0.3 ppm	0.05 ppm	1 ppm	Above the health goal6x the health goal
Fluoridehighest measured · range 0.3 to 1.1 · Entry points · 2025 report, page 6	1.1 ppm	1 ppm	4 ppm	Above the health goal1.1x the health goal
Gross alpha (radioactivity)highest measured · range ND to 1.6 · Entry points · 2025 report, page 6	1.6 pCi/L	0 pCi/L	15 pCi/L	Above the health goalThe health goal is zero
Lead90th percentile of 56 homes tested, 2 over the action level · sampled 2024 · Customer taps (56 homes) · 2025 report, page 5	3 ppb	0.2 ppb	15 ppb (action level)	Above the health goal15x the health goal
Radium (combined 226 + 228)highest measured · range ND to 0.8 · Entry points · 2025 report, page 6	0.8 pCi/L	0 pCi/L	5 pCi/L	Above the health goalThe health goal is zero
Total dissolved solidshighest measured · range 464 to 716 · Distribution system · 2025 report, page 4	716 ppm	—	500 ppm guideline	Above the guideline1.4x the guideline (taste, odor or stains; not a health limit)
Uraniumhighest measured · range ND to 4.6 · Entry points · 2025 report, page 6	4.6 ppb	0.6 ppb	30 ppb	Above the health goal7.7x the health goal
Bariumhighest measured · range 0.007 to 0.13 · Entry points · 2025 report, page 6	0.13 ppm	2 ppm	2 ppm	Below the health goal
Bromatehighest running annual average · range ND to 5 · Entry points · 2025 report, page 3	Not detected	0.1 ppb	10 ppb	Not detected
Chlorinehighest running annual average · range ND to 1.9 · Distribution system · 2025 report, page 3	0.84 ppm	None set	4 ppm	Below the legal limit
Chlorine dioxidehighest measured · range ND to 540 · Water treatment plants · 2025 report, page 3	540 ppb	None set	800 ppb	Below the legal limit
Chromium (total)highest measured · range ND to 87 · Entry points · 2025 report, page 6	87 ppb	None set	100 ppb	Below the legal limit
Copper90th percentile of 56 homes tested, 0 over the action level · sampled 2024 · Customer taps (56 homes) · 2025 report, page 5	0.3 ppm	0.3 ppm	1.3 ppm (action level)	Below the health goal
Disinfection byproducts (HAA5)highest running annual average · range 0.6 to 26 · Distribution system · 2025 report, page 3	17 ppb	None set	60 ppb	Below the legal limit
Disinfection byproducts (TTHM)highest running annual average · range 4 to 68 · Distribution system · 2025 report, page 3	49 ppb	None set	80 ppb	Below the legal limit
E. colias reported · Distribution system · 2025 report, page 6	Not detected	0 positive samples	0 positive samples	Not detected
Ironhighest measured · range ND to 0.03 · Distribution system · 2025 report, page 4	0.03 ppm	—	0.3 ppm guideline	Within the guideline
Nitrate (as N)highest annual average · range ND to 4.5 · Entry points · 2025 report, page 6	3.8 ppm	10 ppm	10 ppm	Below the health goal
Seleniumhighest measured · range ND to 2.2 · Entry points · 2025 report, page 6	2.2 ppb	30 ppb	50 ppb	Below the health goal
Hardnesshighest measured · range 10.1 to 17.7 · Distribution system · 2025 report, page 4	17.7 gpg (302 ppm)	—	—	Very hard
Lithiumaverage · range 22.2 to 160 · sampled 2024 · Entry points (UCMR 5) · 2025 report, page 2	70.2 ppb	None set	None	No health limit
PFBA (a PFAS)average · range 5 to 6 · printed as 0.005 ppb · sampled 2024 · Entry points (UCMR 5) · 2025 report, page 2	5 ppt	None set	None	No health limit
PFBS (a PFAS)average · range 7 to 16 · printed as 0.011 ppb · sampled 2024 · Entry points (UCMR 5) · 2025 report, page 2	11 ppt	None set	None	No health limit
Sodiumhighest measured · range 91 to 183 · Distribution system · 2025 report, page 4	183 ppm	None set	None	No health limit

Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 1 number we weren’t sure about is held back until a person checks.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in Phoenix City of’s water between Jan 2023 and Dec 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

PFBS16 pptFound in 12 of 52 samples · highest resultNo federal limit in force for this one
Lithium160 ppbFound in 53 of 53 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)

Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.

What you can do

Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.