Yes, at low levels. 1 PFAS was detected, all below EPA's 2024 limits.
Also detected, no federal limit: PFBS.
City of Scottsdale is a public water system drawing on surface water, based in Scottsdale, Arizona, serving about 241,361 people, including Phoenix, Scottsdale, Paradise Valley, Fountain Hills, Tempe, Cave Creek. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 18 times across 7 sampling points between Jan 2025 and Dec 2025.
| PFAS | Detected | Highest | Worst point avg | EPA limit |
|---|---|---|---|---|
| PFBS Perfluorobutanesulfonic acid |
1 of 18 | 3.2 ppt | 0.8 ppt | none |
Not detected: PFNA, 8:2 FTS, PFMPA, PFTA, PFTrDA, NEtFOSAA, NMeFOSAA, 4:2 FTS, PFHxS, 9Cl-PF3ONS, PFOS, PFOA, PFDA, PFDoA, PFHxA, 11Cl-PF3OUdS, ADONA, HFPO-DA, PFBA, 6:2 FTS, PFHpA, PFEESA, PFPeA, PFUnA, NFDHA, PFPeS, PFHpS, PFMBA.
Lithium, tested in the same program: highest 90.4 ppb, detected in 18 of 18 samples. EPA's health-based screening level is 10 ppb.
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.
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.
All 152 tested systems in Arizona
85018 85250 85251 85252 85253 85254 85255 85256 85257 85258 85259 85260 85261 85262 85266 85267 85268 85281 85282 85331 85377
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in City of Scottsdale water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID AZ0407098. https://wellandtap.com/pfas/arizona/city-of-scottsdale/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID AZ0407098). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
