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‘Forever chemicals’ have made rainwater ‘unsafe to drink’

A new study has uncovered that rainwater almost everywhere on Earth has unsafe levels of per- and polyfluoroalkyl substances which are hazardous for both people and planet.

In even the most remote parts of the world, the level of ‘forever chemicals’ in the atmosphere has become so high that rainwater is now ‘unsafe to drink.’

This is according to a newly released study conducted by researchers at the Department of Environmental Science in Stockholm, which ascertain that today, PFAS (which stands for per- and polyfluoroalkyl substances) making water ‘ubiquitously above guideline levels’ can be found everywhere from Antarctica to the Tibetan Plateau.

By conducting laboratory and fieldwork on the atmospheric presence and transport of PFAS for the past decade, the team was able to conclude that levels are not declining notably despite their phase out by 3M already two decades ago.

The group of man-made hazardous products, which are often used in the manufacture of food packaging, clothing, and cosmetics, are notorious for how toxic they can be in small doses.

Known as ‘forever chemicals’ because of how long they persist in both our bodies and the planet, PFAS have been linked to widespread human health and environmental issues.

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What’s most concerning is that PFAS’ don’t break down naturally, instead, they accumulate over time, wreaking havoc on our wellbeing and bringing us ever-closer to climate destruction.

Exposure to PFAS, which are highly mobile and can be absorbed through the skin, by tear ducts, or ingested, is able to impair the immune system, increase levels of cholesterol as well as the risk of kidney and testicular cancer, and cause high blood pressure or preeclampsia in pregnancy.

For this reason, it’s understandable why the discovery that these forever chemicals have globally spread through water courses, oceans, and soils is raising alarm bells.

‘There has been an astounding decline in guideline values for PFAS in drinking water in the last 20 years,’ says Ian Cousins, the lead author of the analysis.

‘For example, the drinking water guideline value for one well-known substance in the PFAS class, namely the cancer-causing perfluorooctanoic acid (PFOA), has declined by 37.5 million times in the US. Based on the latest US guidelines for PFOA in drinking water, rainwater everywhere would be judged unsafe to drink.’

As Cousins explains, although in the industrial world we don’t tend to drink rainwater, many people expect it to be safe because it supplies many of our drinking water sources.

He also stresses that it cannot be that ‘some few’ benefit economically while polluting the drinking water for millions of others so the industry producing and using forever chemicals must act now to reduce them.

‘The extreme persistence and continual global cycling of certain PFAS will lead to the continued exceedance of the [water quality] guidelines,’ says the paper’s co-author Professor Martin Scheringer of ETH Zurich in Switzerland.

‘So now, due to the global spread of PFAS, environmental media everywhere will exceed environmental quality guidelines designed to protect human health and we can do very little to reduce the PFAS contamination.’

‘In other words, it makes sense to define a planetary boundary specifically for PFAS which, as we concluded, has now been exceeded.’

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