Overview

This study, conducted by U.S. Food and Drug Administration, tested 91 samples for 28 chemicals using Lc Ms Ms. Published December 1, 2024.

Summary by chemical class

Class Samples Detections Below MDL
PFAS 91 2 2,368

Top detections

Highest concentrations reported in this study, ranked by value. Values shown in original study units — not directly comparable across measurement methods.

Food / Product Chemical Value Status
Clams PFOA 300.00 ppt detected
Clams PFOS 240.00 ppt detected
Shrimp PFTrDA 140.00 ppt trace
Shrimp PFUdA 130.00 ppt trace
Cod PFUdA 120.00 ppt trace
Salmon PFUdA 100.00 ppt trace
Clams PFNA 93.00 ppt trace
Clams PFTrDA 81.00 ppt trace
Cod PFNA 77.00 ppt trace
Catfish PFUdA 58.00 ppt trace
Salmon PFTrDA 54.00 ppt trace
Clams PFDoA 54.00 ppt trace
Beef PFOS 51.00 ppt trace
Clams PFDA 48.00 ppt trace
Tilapia PFUdA 46.00 ppt trace
Cod PFTrDA 42.00 ppt trace
Catfish PFTrDA 41.00 ppt trace
Clams PFHxS 41.00 ppt trace
Catfish PFOS 38.00 ppt trace
Clams PFUdA 38.00 ppt trace
Clams PFHpA 37.00 ppt trace
Chicken breast PFOA 33.00 ppt trace
Shrimp PFOS 28.00 ppt trace

Methodology

Liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis of U.S. food samples from the FDA Total Diet Study program. Method detection limits at parts-per-trillion (ng/kg) level. Trace values reported in italics indicate concentrations above the method detection limit but below the limit of quantitation.

Original source

FDA Total Diet Study Dataset 12 — PFAS in 2024 U.S. Food Supply
U.S. Food and Drug Administration · December 1, 2024

View original study →