France's Water-gate
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France's multi-billion euro mineral water companies are under the spotlight because of climate change and growing concerns about the industry's environmental impact.
At issue is whether some world-famous brands, notably the iconic Perrier label, can even continue calling themselves "natural mineral water".
A decision in the Perrier case is due in the coming months. It follows revelations in the French media about illicit filtration systems that have been widely used in the industry, apparently because of worries about water contamination, after years of drought linked to climate change.
"This really is our Water-gate," says Stéphane Mandard, who has led investigations at Le Monde newspaper. "It's a combination of industrial fraud and state collusion."
"And now there is a real Sword of Damocles hanging over the head of Perrier."
According to hydrologist Emma Haziza, "the commercial model of the big producers has worked very well. But it is absolutely not sustainable at a time of global climate change".
"When you have big brands that feel they have no choice but to treat their water – that means they know there is a problem with the quality."