Yes, at low levels. 1 PFAS was detected, all below EPA's 2024 limits.
Also detected, no federal limit: PFPeA.
Oklahoma City is a public water system drawing on surface water, based in Oklahoma City, Oklahoma, serving about 644,000 people, including Edmond, Bethany, Binger, Calumet, Dougherty, El Reno. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 8 times across 2 sampling points between Jan 2024 and Oct 2024.
| PFAS | Detected | Highest | Worst point avg | EPA limit |
|---|---|---|---|---|
| PFPeA Perfluoropentanoic acid |
3 of 8 | 4.7 ppt | 2.8 ppt | none |
Not detected: PFDA, PFOA, NMeFOSAA, PFHpS, PFOS, PFNA, PFHpA, 9Cl-PF3ONS, PFTA, NEtFOSAA, PFDoA, PFHxS, PFTrDA, 4:2 FTS, ADONA, HFPO-DA, PFBS, 6:2 FTS, PFHxA, 8:2 FTS, 11Cl-PF3OUdS, PFUnA, PFBA, PFMPA, NFDHA, PFEESA, PFMBA, PFPeS.
Lithium, tested in the same program: highest 67.8 ppb, detected in 5 of 8 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 166 tested systems in Oklahoma
73003 73008 73009 73012 73013 73014 73032 73034 73036 73049 73054 73062 73064 73065 73068 73069 73070 73071 73078 73079 73083 73084 73089 73093 73097 73099 73101 73102 73103 73104 73105 73106 73107 73108 73109 73110 73111 73112 73114 73115 73116 73117 73118 73119 73120 73121 73122 73126 73127 73128 73129 73130 73131 73132 73134 73135 73136 73137 73139 73141 73142 73143 73144 73145 73148 73149 73150 73151 73154 73157 73159 73160 73162 73164 73165 73167 73169 73170 73172 73173 73179 73189
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Oklahoma City water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID OK1020902. https://wellandtap.com/pfas/oklahoma/oklahoma-city/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID OK1020902). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
