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On 4 December 2023, the EU published a draft amendment to Annex I of the POPs Regulation (EU) 2019/1021, proposing to lower the maximum concentration of perfluorooctane sulfonic acid (PFOS) and its derivatives permitted as an unintentional trace contaminant (UTC) in substances, mixtures and articles, and to remove the last specific exemption allowed in the EU. The feedback period for the draft closed on 1 January 2024. PFOS was the first per- and polyfluoroalkyl substance regulated by the EU; the UTC limit was set a long time ago, and the proposed reduction is intended to keep pace with scientific and technological developments and to align with the control limit for the similar substance PFOA.

A comparison between the current PFOS control requirements and the proposed amendments is shown below:
