17 October 2026
A comprehensive investigation conducted by the Radio France Investigative Unit (Cellule Investigation de Radio France) and the Ici regional network, and highlighted by the consumer protection association UFC-Que Choisir, has revealed widespread contamination of backyard eggs with per- and polyfluoroalkyl substances (PFAS) across France. Although consumers often associate backyard eggs with “natural,” chemical-free nutrition, unrestricted outdoor access can expose domestic poultry to persistent environmental pollutants that are subject to strict monitoring and regulatory limits in commercial poultry production.
To assess the extent of environmental contamination beyond the commercial food chain, investigators collected and analyzed 91 eggs from private backyard coops across several French regions. Laboratory testing detected PFAS in 52 of the 91 eggs (approximately 57.1%). Of these, 23 eggs (25.3% of the total sample) exceeded the maximum residue limits applicable to commercially marketed eggs in the European Union, including two samples with exceptionally high concentrations. PFOS (perfluorooctanesulfonic acid), one of the regulated PFAS compounds associated with liver toxicity, immunotoxicity, and reproductive effects, was detected in 19% of all samples, alongside short- and long-chain carboxylic acids.
