Significant Decline in ‘Forever Chemicals’ Detected in English Waterways
Recent findings from a report by the Environment Agency reveal a notable decrease in the levels of two notorious ‘forever chemicals’, PFOS and PFOA, in the rivers and freshwater fish of England over the past decade. This positive trend is attributed to the implementation of restrictions and proactive measures taken by the government.
PFAS (per- and polyfluoroalkyl substances) comprise a broad spectrum of chemicals utilised across various products and industrial processes. Their designation as ‘forever chemicals’ stems from their resistance to breaking down, often persisting in the environment for hundreds of years and accumulating over time.
The newly published report, titled PFAS sources, pathways & environmental data, updates the Environment Agency’s assessment from 2021, offering a more comprehensive view of these enduring substances within the ecosystem. It draws from an expanded dataset and improvements in monitoring and analytical techniques.
Encouraging Reductions in Chemical Levels
Between 2016 and 2025, PFOS levels in English rivers have decreased by approximately 30%, with PFOA levels dropping by 29%. Additionally, concentrations of PFOS in freshwater fish have seen a significant decline of around 49%.
These encouraging reductions highlight the effectiveness of government regulatory actions, including the imposition of controls and restrictions on PFOS and PFOA. However, the report also indicates that the presence of PFAS remains extensive, a consequence of decades of historical usage and ongoing emissions from certain sources.
The insights from this report will play a crucial role in the implementation of the UK’s inaugural PFAS Plan, which was introduced earlier this year to enhance protection for both the public and the environment against these persistent chemicals.
Addressing Environmental Challenges through Strategic Planning
The PFAS Plan aims to tackle one of the most urgent environmental issues of our time, outlining a future strategy to better comprehend the origins of these chemicals, their dispersion, and methods to mitigate exposure.
Dr Robert Bradburne, Chief Scientist at the Environment Agency, remarked on the advancements in the understanding of PFAS since 2021. He noted the enhanced monitoring capabilities that now allow for a broader range of these chemicals to be tracked with increased precision, providing a clearer insight into their environmental behaviour.
While the reductions observed in some older PFAS are promising, Dr Bradburne emphasised the necessity for continued efforts. The evidence gathered will aid in identifying areas requiring further action, facilitating informed decisions to safeguard the environment.
Commitment to Reducing Chemical Exposure
Environment Minister Emma Hardy expressed the government’s commitment to intensifying efforts against forever chemicals through stricter regulations, updated guidelines, extensive monitoring, and support for safer alternatives.
She praised the findings of the report and reaffirmed the government’s determination to diminish public and environmental exposure to these substances.
Dr David Megson, a Reader in Chemistry and Environmental Forensics at Manchester Metropolitan University, praised the progress made over the last decade. He highlighted the importance of the extensive data collected from thousands of samples, which is vital for understanding the state of the environment concerning PFAS.
Future Actions and Advanced Monitoring Techniques
The report underscores the necessity of identifying and addressing the most severely affected areas of PFAS pollution to expedite remedial efforts. Dr Megson expressed enthusiasm for the Environment Agency’s integration of advanced analytical techniques that focus on total PFAS and non-targeted analysis, which will help preemptively address emerging trends.
Key initiatives outlined in the PFAS Plan include enhanced testing and monitoring of England’s estuaries and coastal waters, as well as the development of safer alternatives to everyday products such as water-repellent clothing and footwear. A new platform will also be launched to improve public understanding and to provide guidance for regulators and industries addressing legacy PFAS contamination.
Further plans involve potential restrictions on the use of forever chemicals in firefighting foams, alongside legislative measures to prohibit additional persistent organic pollutants.
Leading the Way in PFAS Research and Monitoring
The Environment Agency has established one of the most advanced PFAS monitoring frameworks globally, with an expanded programme encompassing rivers, lakes, groundwater, estuaries, coastal waters, and landfill leachate. The monitoring now encompasses a broader array of PFAS, including newer substances and those that can degrade into more concerning chemicals.
Moving forward, the Environment Agency is committed to broadening its knowledge base on PFAS and similar chemicals through research into airborne monitoring, water thresholds, and potential alternatives. This ongoing work will inform future policies, regulations, and targeted interventions aimed at driving impactful actions in the fight against environmental contamination.