The United Kingdom’s departure from the European Union in January 2020 severed the automatic pipeline through which EU chemical regulations—including PFAS restrictions under REACH—would have applied in the UK. As a result, UK PFAS regulation is now governed by UK REACH, administered by the Health and Safety Executive (HSE), and is diverging from the EU framework in pace and scope, creating compliance complexity for companies operating in both markets.
UK REACH and the PFAS Regulatory Gap
At the point of Brexit, UK REACH retained all EU REACH restrictions and authorisations in force as of December 31, 2019—including the PFOS restriction under Annex XVII and PFOA restrictions that had been finalized under EU regulation. However, subsequent EU PFAS developments—including the landmark OECD-informed universal PFAS restriction proposal submitted by five EU member states in 2023—do not automatically apply in the UK. The HSE must initiate separate UK restriction processes for each new PFAS control measure, a resource-intensive undertaking.
As of 2025, the HSE has begun a review process for PFAS as a chemical class but has not yet proposed UK-specific PFAS restrictions beyond those inherited at Brexit. The UK’s drinking water quality standards for PFAS, set under the Water Supply (Water Quality) Regulations 2016 and 2018 amendments, are broadly aligned with pre-2020 EU Drinking Water Directive levels—which were already considered insufficiently protective by many scientific bodies. The UK has not yet transposed the EU’s more stringent 2020 Drinking Water Directive PFAS parametric values.
Industry and Policy Implications of Divergence
For manufacturers and importers operating across both markets, divergence creates dual compliance burdens. Products compliant with EU PFAS restrictions may need separate UK conformity assessments if UK REACH develops different substance lists or exemption criteria. Conversely, sectors phasing out PFAS under EU pressure may find the UK market temporarily more permissive—a dynamic that some industry observers warn could make the UK a dumping ground for PFAS-containing products no longer viable in the EU.
UK environmental NGOs and scientific bodies have called on the government to match EU ambition on PFAS, pointing to evidence that PFAS contamination of UK drinking water sources, rivers, and wildlife is comparable to levels found across Europe. The government’s 2023 Critical Minerals Strategy and interest in maintaining a domestic fluorochemicals sector create some political tension with aggressive PFAS phase-out policies.
UK water companies, anticipating eventual tightening of drinking water standards, have begun voluntary PFAS monitoring programs and feasibility studies for treatment installation. Proactive utilities argue that early investment in granular activated carbon (GAC) or ion exchange (IX) systems will be less costly than reactive compliance after standards are tightened under future UK REACH restrictions.