Drop in toxic forever chemicals found in UK rivers
Data shows concentrations of PFOS and PFOA in English rivers have dropped by roughly 30% over the last decade following strict regulatory controls.
Stock photo for illustration only, not from the actual event
- PFOS and PFOA levels in English rivers dropped by 30% and 29% over a decade.
- PFAS chemicals were first developed in the 1930s for water and oil resistance.
- The UK government has launched new plans to monitor chemical levels in human bodies.
A significant decline in hazardous forever chemicals across waterways in England has been attributed to stricter regulatory controls on industrial products. The reduction follows mounting scientific evidence regarding the detrimental impacts that these persistent compounds inflict on both human health and natural ecosystems.
Referred to officially as PFAS, these substances were originally formulated during the 1930s in the United States, gaining widespread commercial adoption among manufacturers of consumer goods such as non-stick frying pans and firefighting foam due to their exceptional thermal, oil-resistant, water-resistant, and electrical insulation properties.
Stock photo for illustration only, not from the actual event
Because of their extreme chemical resilience, these compounds do not easily degrade under natural conditions, earning them the moniker of forever chemicals. Two decades ago, researchers began uncovering alarming links between early variants like PFOS and PFOA and tissue damage in wildlife alongside elevated risks of serious human health conditions, including testicular cancer.
Consequently, the UK government implemented near-total bans on PFOS in 2010 and PFOA in 2020. Fresh data published by regulatory authorities on Thursday indicates that over the past ten years, river concentrations of PFOS and PFOA have tumbled by 30% and 29% respectively, while levels detected in freshwater fish populations have plummeted by 49%.
"It is brilliant to see how far the UK has come on this issue."
Chemical impact expert
Despite these encouraging reductions, approximately 15,000 other variants of PFAS remain in circulation, with around 200 seeing frequent commercial application. The chemical manufacturing sector has historically opposed blanket restrictions, arguing that evidence regarding the toxicity of alternative PFAS remains limited and that certain compounds play indispensable roles in critical medical equipment.
The persistence of PFAS stems from the incredibly strong carbon-fluorine bonds within their molecular structures, which resist natural breakdown processes. Environmental assessments note that while measured concentrations in rivers have declined, the absolute mass of chemicals remaining in the environment likely persists largely unchanged, having merely been diluted and washed downstream into marine environments. Permanent destruction generally requires energy-intensive high-temperature incineration.
Environmental regulators now routinely test for an additional 60 types of PFAS to map contamination footprints nationwide. Furthermore, government officials announced initiatives earlier this month to begin tracking the presence of these synthetic compounds directly within human biological samples.
Source: BBC Science & Environment
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