Concentrations of two highly toxic per- and polyfluoroalkyl substances in England’s river systems have decreased by roughly 30% over the past decade, according to new figures published by the Environment Agency.
The latest regulatory data shows that river concentrations of PFOS and PFOA dropped by 30% and 29% respectively over the last ten years. Freshwater fish experienced an even sharper drop, with contaminant levels falling by 49% across the same timeframe.
Regulators attribute the downward trend to stricter restrictions placed on manufacturing and product use. Researchers first identified links between the compounds and tissue damage in animals as well as elevated rates of serious health conditions such as testicular cancer two decades ago.
Those findings prompted regulatory intervention. The UK all but banned PFOS in 2010 and followed with a near-total ban on PFOA in 2020. These chemicals were originally developed in the United States during the 1930s and grew widespread due to their oil-repellent, water-repellent, and electrical insulating properties in goods ranging from firefighting foam to non-stick frying pans.
Experts monitoring the environment welcomed the measurable progress while noting the limits of current remediation efforts. Dr David Megson, reader in environmental forensics at Manchester Metropolitan University, pointed to the scale of the achievement.
However, Megson cautioned that the total volume of these persistent synthetic substances lingering in the environment has likely remained steady. Rather than breaking down, the chemicals have largely been diluted and washed into the sea. High-temperature incineration remains one of the few ways to permanently destroy PFAS molecules, but only two suitable facilities currently operate in the country.
While the earliest and most hazardous variants show declining river concentrations, thousands of related compounds remain in commercial circulation. Regulators estimate that there are around 15,000 other PFAS, with about 200 seeing frequent use.
The Environment Agency said that uncertainty remains regarding the toxicity of many PFAS, arguing that the latest data reinforces the need for comprehensive group regulation rather than restricting compounds individually.
Chemical manufacturing representatives have historically resisted blanket restrictions, arguing that evidence of toxicity is limited for many alternative compounds and that certain substances serve vital functions in specialized medical equipment. In response to the broader contamination challenge, the Environment Agency has expanded testing to track 60 additional PFAS compounds nationally, while the government announced earlier this month it would begin monitoring PFAS levels in people’s bodies.
Earlier coverage: Environment Agency Figures Show Toxic Forever Chemical Levels Drop
