Ultrapure water is used to clean semiconductors and make microchips. This level of pure water would suck vital minerals right out of your body. Plus it tastes really flat.
Water too pure to drink?
Every day, around the world, tens of millions of gallons of the cleanest water possible are created, water so clean that it is regarded as an industrial solvent, absolutely central to high-tech manufacturing but not safe for human consumption.
The clean water–it’s called ultrapure water (UPW)–is a central part of making semiconductors, the wafers from which computer microchips are cut for everything from MRI scanners to greeting cards.
Chips and their pathways are built up in layers, and between manufacturing steps, they need to be washed clean of the solvents and debris from the layer just completed.
The water must have nothing in it except water molecules–not only no specks of dirt or random ions, no salts or minerals, it can’t have any particles of any kind, not even minuscule parts of cells or viruses.
And so every microchip factory has a smaller factory inside that manufactures ultrapure water. The ordinary person thinks of reverse-osmosis as taking “everything” out of water. RO is a process you use to turn seawater into drinking water. In human terms, RO does take most everything out of the water. But when industrial high purity water is needed RO is used together with EDI (electrodeionization) to make ultrapure water.