"The bacteria concentration after filtration depends on the initial concentration of bacteria in water, " said developer Dr Cui of Stanford University.

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The move comes after Sogefi Filtration Ltd's announcement on Thursday that many jobs are at risk at its south Wales plant as the company restructures to face "difficult market conditions".

BBC: Traffic

And maybe after only one filtration you will get 'safe' water.

CNN: Nanotech and 'tea bag' to clean up drinking water

There is no filtration after the second distillation.

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Production has ended at the Sogefi Filtration plant in Llantrisant after an official 90-day consultation period on redundancies came to an end.

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Michael Pritchard, a British inventor, served it to me after running it through his Lifesaver ultra filtration water bottle.

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That sent shares of the filtration products maker nearly 3% after hours.

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