A study has detected elevated concentrations of persistent ‘forever chemicals‘ known as PFAS in snow samples from the Engadin valley in the eastern Swiss Alps, prompting a call for recreational skiers to update their ski wax kits. Per- and polyfluoroalkyl substances, or PFAS, are a class of synthetic chemicals prized for their water and grease resistance. For decades, they have been key ingredients in certain high-performance ski waxes, designed to enhance the glide of skis. But because PFAS do not naturally break down, they persist for centuries in the environment once released. Wax manufacturers have largely complied, switching their product lines to fluorine-free alternatives. However, the general population of recreational skiers hasn’t upgraded kits.

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