Is there PFAS in City of Phoenix water?
Yes, at low levels. 2 PFAS were detected, all below EPA's 2024 limits.
City of Phoenix
Serves 1.7 million people · 52 PFOA samples from 21 sampling points · Jan 2023 to Dec 2023
PFAS found, below EPA limits
PFOA Perfluorooctanoic acid
not detected
PFOS Perfluorooctanesulfonic acid
not detected
Hazard index GenX, PFBS, PFNA, PFHxS combined
0.0 avg
Also detected, no federal limit: PFBS, PFBA.
City of Phoenix is a public water system drawing on surface water, Arizona, serving about 1.7 million people, including Boulder, Phoenix, New River, Scottsdale, Paradise Valley, Glendale. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 52 times across 21 sampling points between Jan 2023 and Dec 2023.
Every PFAS detected
Not detected: 8:2 FTS, PFMPA, PFPeA, PFMBA, PFEESA, NFDHA, PFTrDA, PFHpS, NEtFOSAA, PFTA, 4:2 FTS, PFDoA, PFPeS, NMeFOSAA, ADONA, 9Cl-PF3ONS, 11Cl-PF3OUdS, PFHxA, PFDA, PFOA, PFOS, PFNA, PFHxS, PFHpA, 6:2 FTS, PFUnA, HFPO-DA.
Lithium, tested in the same program: highest 160 ppb, detected in 53 of 53 samples. EPA's health-based screening level is 10 ppb.
What the EPA limits mean here
In April 2024 EPA set enforceable limits of 4 ppt for PFOA and PFOS, 10 ppt each for PFHxS, PFNA and GenX, and a hazard index of 1 for mixtures. Utilities were given until 2029 to comply. In May 2026 EPA proposed keeping only the PFOA and PFOS limits and moving that deadline to 2031. Until that proposal is final, the 2024 limits stand.
Compliance is judged on a running annual average at each entry point, so we show the average at this system's worst sampling point next to its single highest result. UCMR 5 results do not by themselves put a utility in or out of compliance.
What you can do at home
Levels here are under EPA's limits, so no treatment is required. If you want them lower anyway, a certified reverse osmosis system under the sink handles drinking water, and a whole-house carbon filter also takes out the chlorine or chloramine your utility adds.
Other systems in Arizona
All 152 tested systems in Arizona
ZIP codes served
80306 85001 85003 85004 85005 85006 85007 85008 85009 85012 85013 85014 85015 85016 85017 85018 85019 85020 85021 85022 85023 85024 85027 85028 85029 85031 85032 85033 85034 85035 85036 85037 85040 85041 85042 85043 85044 85045 85048 85050 85051 85053 85054 85058 85083 85085 85086 85087 85098 85250 85251 85253 85254 85255 85256 85257 85262 85304 85305 85307 85308 85310 85331 85339 85353
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Cite this page
Well & Tap. "PFAS in City of Phoenix water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID AZ0407025. https://wellandtap.com/pfas/arizona/city-of-phoenix/
About this data
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID AZ0407025). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
