UK REACH and PFAS Regulation After Brexit
Following Brexit, the UK retained EU chemical legislation through UK REACH — a domestic version of EU REACH that incorporated existing EU restrictions and authorization requirements at the point of departure. PFAS restrictions that applied under EU REACH at the time of Brexit — including PFOS and PFOA restrictions — automatically became UK REACH restrictions.
UK REACH is administered by the Health and Safety Executive (HSE) rather than ECHA. The UK Chemical Regulation Directorate within HSE evaluates new PFAS-related restrictions proposed under UK REACH independently of EU processes, creating the potential for UK-EU regulatory divergence over time as each jurisdiction develops new PFAS standards on separate tracks.
Current UK PFAS Standards
Drinking water PFAS standards in England are set by the Drinking Water Inspectorate (DWI) and are currently less stringent than the 2024 U.S. EPA MCLs. The UK Drinking Water Quality Regulations set parametric values for PFOS and PFOA that were developed before the most recent international scientific consensus on PFAS health effects.
Scottish, Welsh, and Northern Irish drinking water regulation follows similar frameworks but with some jurisdictional variation. Environmental contamination from PFAS at legacy sites — including military bases and industrial locations — is addressed through the Environmental Damage (Prevention and Remediation) Regulations and Contaminated Land Regime under the Environment Act 1990.
Future Regulatory Direction
UK PFAS policy is under review, with HSE and the Environment Agency considering updates to align UK standards more closely with emerging international evidence and to address PFAS compounds not covered by inherited EU restrictions. The UK Government’s chemicals strategy provides a framework for this review.
Business stakeholders monitor UK-EU PFAS regulatory divergence closely: UK-based manufacturers exporting to the EU must comply with EU REACH regardless of UK standards, creating practical pressure for UK standards to track EU developments. Environmental organizations advocate for UK PFAS standards that are at least as protective as EU standards and ideally more aligned with the precautionary EU universal restriction approach.