iv UK Focus
Are British regulations for PFAS in water too lenient? TALKING POINT
Recently, a study conducted by the British Broadcasting Corporation found that the levels of per- and polyfl uoroalkyl substances (PFAS) in British water routinely exceed European standards for safety – yet none of them exceeded the legal limits for England and Wales.
Often correlated with serious diseases, including various cancers, ulcerative colitis and thyroid disorders, PFAS are, nevertheless, to be found in non-stick pans, food packaging, carpets, furniture, fi refi ghting foam, and many other common objects. As things stand, the Drinking Water Inspectorate (DWI), which has jurisdiction in both England and Wales, holds to guidelines which state that in drinking water, the presence of PFAS chemicals must be restricted to less than 100 nanograms per litre (ng/l).
In collaboration with the University of Greenwich and Manchester Metropolitan University, the BBC took 45 samples from tap water at various sites in England, none of which exceeded the 100ng/l recommended by the DWI. Nevertheless, 25 did contain PFAS, four of which had levels in exceedance of 10ng/l, which under current guidelines, requires that local healthcare provides must be engaged and the levels monitored. Most importantly, almost half of these samples exceeded the European Food Standards Agency’s tolerable limit of 2.2ng/l.
In light of this data, many will be particularly concerned about the eff ect that such high levels could have on the health of children. The problem, as Professor Philippe Grandjean of Harvard University has detailed, is not so much the direct ingestion of PFAS by infants, but the knock-on eff ects of bioaccumulation that result from the mother’s exposure. Professor Grandjean: “A woman may build this up in her body and when she gets pregnant, she shares that with her foetus. She eliminates part of her body burden into her milk. So, the next generation will get a huge dose, and the baby may end up having up to 10 times as much PFAS in the blood as her mother has.” Indeed, this is the most worrying dimension of regulatory inaction; even if we brought the offi cial limits down to nothing tomorrow morning, we’ll still have this nasty feedback loop to manage.
But nevertheless, we want to bring the limits increasingly closer to nothing, says former head of the National Institute of Environmental Sciences, Linda Birnbaum: “We are beginning to think that there’s no such thing as a safe level and we want them to be as low as possible, because water is not the only source of exposure.” As a result, the United States is now considering the reduction of its own regulatory level, which currently sits just below the UK’s limit at 70ng/l. Closer to home, Scotland will begin enforcing European limits next year. Perhaps, this will spur Westminster into action.
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