Turning policy into progress: A pathway to tackle the UK PFAS challenge

For decades, perfluoroalkyl and polyfluoroalkyl substances (PFAS) have permeated water systems, soils and organisms worldwide. The UK government’s recently published PFAS Plan: building a safer future together is a welcome acknowledgement of these ‘forever chemicals’ and their persistence across the environment.

The central focus now is not just understanding but acting collaboratively, and with clarity of purpose, to tackle this complex challenge. A pragmatic pathway seems to be the most sensible approach. This could take the form of an initiative from framework to action: immediate enhancement of monitoring and risk prioritisation; medium-term introduction of statutory thresholds, source management and optimised treatment; and long-term integration of PFAS into life cycle chemical governance and safer alternatives. This could then be aligned with measurable reductions in environmental and human exposure.

The PFAS diversity and durability challenge

PFAS are a large and diverse class of thousands of synthetic compounds characterised by high resistance to heat, water and oil, which makes them useful in many products, from firefighting foams and medical devices to textiles and packaging. Their durability means they do not break down readily in the environment and accumulate, persistently.

In the UK, advanced monitoring has found PFAS in nearly every river tested, with compounds such as trifluoroacetic acid (TFA) present in 31 of 32 waterways surveyed [1] and legacy PFAS such as PFOS, PFOA, PFHxS and PFNA frequently detected in surface waters [2]. Despite intensive monitoring, with over 1.7 million individual analyses conducted by water companies since 2012, these substances are widespread at concentrations that exceed health-based thresholds, highlighting the scale and severity of the contamination challenge.

The UK’s new PFAS Plan sets out a long-term, science-based framework built around three pillars: understanding PFAS sources; tackling how they enter and move through the environment; and reducing ongoing exposure to people, wildlife and ecosystems. The plan calls for enhanced monitoring, evidence gathering and coordination among government departments, industry, academia and the public. While the evidence base is expanding rapidly, what matters now is how decisively it informs regulatory thresholds, investment decisions and practical risk reduction.

From knowledge to action

The plan recognises the beneficial use and harmful legacy of PFAS and emphasises proportionate regulation. However, some stakeholder groups describe it as “crushingly disappointing” or a “roadmap to nowhere”, pointing to its reliance on future research and consultation rather than immediate, enforceable actions [3]. This reflects a fundamental policy choice: should regulators wait until they feel they ‘know enough’ to act, or should they proceed with precautionary limits, informed by existing science and risk frameworks? Countries such as Denmark and France are already moving toward substance-specific bans and strict controls that go beyond monitoring to reduction of use and environmental load. In the UK, we can either continue refining data or start shifting from evidence into tangible safeguards now.

Practical and phased solutions

The complexity of PFAS demands a phased, practical strategy that links policy intent with real-world outcomes (Figure 1). Below are opportunities to accelerate progress.

Short term (0–2 years): Build baselines and prioritise action

• Expand monitoring with purpose – it is critical that data move beyond isolated concentration snapshots to total PFAS load assessments, which provide a more meaningful basis for regulatory and remediation priorities.
• Set interim standards – while permanent regulations are developed, interim guidance for key PFAS in water supplies and effluents should be adopted to guide industry and utilities.
• Identify priority sources – military sites, industrial facilities and legacy contamination hotspots must be mapped and assessed for early mitigation and risk reduction. Emerging evidence suggests widespread PFAS contamination in surface and groundwater requires focus now.

Medium term (2–5 years): Intervene and innovate

• Effective regulatory reform – statutory limits for PFAS in drinking water and discharges must be established. The government has indicated that consultations on such limits are forthcoming; these must be ambitious, health-protective and aligned with best international standards.
• Targeted source management – phasing out non-essential PFAS use and tightening controls on industrial emissions, including permitting and waste frameworks, will cut new releases at source.

Long term (>5 years): Transform and prevent

• Install effective treatment – water utilities already face PFAS challenges in raw sources. Trialled and tested removal technologies such as advanced adsorption and ion exchange processes can improve protection, particularly where PFAS detection triggers regulatory responses. Studies of novel adsorbent materials show they can achieve significant PFAS capture from contaminated waters and commercially available ion exchange resins can exhibit high-uptake capacities for priority PFAS, driven by electrostatic and hydrophobic interactions that enhance capture in surface water, groundwater and effluent treatment contexts.
• Life cycle regulation – PFAS must be integrated into broader chemicals management frameworks, including UK REACH reform, to ensure that production, use, waste and legacy contamination are addressed systematically.
• Promote safer alternatives – regulatory transition plans should be paired with innovation incentives that promote less-persistent chemistries, reducing future PFAS reliance.
• Collaborative governance – a national PFAS governance architecture linking government, regulators, industry and researchers can sustain progress.

Responding to challenges

There is robust scientific evidence showing PFAS persistence and risk at environmental and human health levels. Incremental advances should inform progressive policy, not delay it. Similarly, arguments about PFAS being essential in certain applications must be weighed against the proven harm from continued environmental release. Where technically and economically viable alternatives exist, their adoption should not be postponed indefinitely. Concerns about costs must be considered realistically; the cost of inaction far outweighs the price of proactive intervention. Substitution must be approached carefully. Alternatives should go through rigorous technical, economic and environmental assessment to ensure they are safer and do not introduce persistence or toxicity of comparable concern.

There is room for optimism. The UK PFAS Plan lays a foundational framework; with meaningful evolution toward enforceable standards and intervention-driven tools, it can catalyse real improvement. The water sector is well placed to lead a transformation by generating practical evidence, deploying practical treatments and shaping regulatory ambition with technical credibility.

A call to action

The UK’s PFAS Plan is not the end of the conversation; it’s the beginning of a delivery phase. The science is sufficiently mature to justify precautionary limits. The analytical tools exist to detect and quantify contamination with increasing precision. Treatment technologies are proven and improving. The regulatory architecture is evolving. What remains is alignment and acceleration.

The real test of the plan will not be how comprehensively it catalogues PFAS but how effectively it reduces exposure in measurable terms. That means moving from exploratory monitoring to robust data sets that can inform investment and operational decisions. It means converting consultation into statutory thresholds, prioritising high-risk catchments and legacy sites for early intervention rather than allowing diffuse contamination to accumulate over time.

For policymakers, this requires confidence that precautionary standards are justified, even where uncertainty remains, that phased implementation can manage cost and that the water sector possesses the technical capability to respond.

For regulators and water companies, it requires action to set interim limits where necessary, to optimise existing water treatment systems, to incorporate PFAS into risk-based catchment management frameworks and to plan capital investment cycles.

For industry, it requires accelerated pathways to substitute where PFAS uses are non-essential. Where they remain critical, life cycle management must become the norm.

And for the wider water community, researchers, consultants, laboratories and technical advisers, it requires leadership in turning data into insight, in clarifying uncertainty and in demonstrating that environmental protection and economic resilience are mutually reinforcing priorities, not competing ones.

As a community, we have a choice: we can allow PFAS to follow the trajectory of past contaminants, or we can take this opportunity to modernise how we manage persistent chemicals. The tools are available and the scientific evidence is substantial and growing. The water sector has deep technical expertise and a strong history of collaborative problem-solving. What is required now is coordinated, practical implementation and a clear line of sight from policy framework to reduce concentrations in our rivers, aquifers and drinking water supplies. Success will not be judged by strategy alone but by demonstrable reductions in environmental load and human exposure. With decisive regulation, pragmatic implementation and sector-wide leadership, the UK can ensure that ‘forever chemicals’ become a managed legacy.

[1] https://fidra.org.uk/download/concentrations-of-trifluoroacetic-acid-tfa-in-uk-surface-waters/.

[2] https://www.sciencedirect.com/science/article/pii/S0045653525007520#sec5.

[3] https://committees.parliament.uk/oralevidence/17164/html/.