PFOS and PFOA levels in England's rivers fall by about 30%
Levels of two legacy 'forever chemicals' in England's rivers have dropped markedly over the past decade, according to a new Environment Agency report published on 12 November 2026. The agency says controls and restrictions introduced by government have helped drive the fall.
The PFAS sources, pathways and environmental data report found that between 2016 and 2025, PFOS in English rivers fell by around 30% and PFOA by 29%. PFOS concentrations in freshwater fish declined by roughly 49%.
Widespread presence continues
PFAS are a large group of chemicals used in a wide range of products and industrial processes. Many break down very slowly and can build up in the environment. The report updates the agency's 2021 assessment and draws on a much larger body of data, with improved monitoring and analysis. It concludes that PFAS remain widespread, reflecting decades of historic use and continued releases from some sources.
Link to the UK PFAS Plan
The findings will support delivery of the UK's first PFAS Plan, published by government earlier this year. Actions highlighted include:
- Improved testing and monitoring of England's estuaries and coastal waters
- Developing safer alternatives to everyday items such as water-repellent clothing and footwear
- A new public information website
- New guidance for regulators and industry on legacy PFAS pollution on contaminated land
- A possible restriction on PFAS in firefighting foams
- Legislation to prohibit further persistent organic pollutants
Expanded monitoring
The Environment Agency's monitoring programme now covers rivers, lakes, groundwater, estuaries, coastal waters and landfill leachate. It also looks at a wider range of PFAS, including newer substances and chemicals that can break down into PFAS of greater concern.
The agency will keep building its evidence base through research into airborne monitoring, water thresholds and potential PFAS replacements, to inform future policy, regulation and targeted intervention.
For manufacturers and suppliers that use or handle PFAS, the report points to continued regulatory attention, including tougher rules on use, updated guidance and support for safer alternatives, as set out by government.
Source: GOV.UK chemicals · Image: Pixabay