Oh, what won't intrepid NYT reporter John Schwartz do for space journalism! Snip:
There are many elements of [NASA's current Space Shuttle Endeavor] mission, which is devoted to further construction of the station and improvements that will allow the station to double its crew size from three to six next year. But the gizmo that is getting the most attention is the "water recovery system," which will recycle the station's water supply. That's right: urine, sweat in the air, waste water and other forms of moisture will be fed into the system, distilled and sent back to the tap.
The system, created at a cost of about $250 million, will recycle about 93 percent of the water used aboard the station. The cost of lifting supplies up to orbit is so high, though, that NASA estimates the system could pay for itself in as little as two years. Similar systems would be essential to maintaining long-term bases on faraway outposts on the Moon and Mars.
The astronauts don't have a problem with this system. As Sandra H. Magnus, one of the astronauts who will be among the first to drink water produced by the new system aboard the station, noted in a recent interview, our earthbound water has been endlessly filtered through bodies, evaporated and rained down again. "We drink recycled water every day," she said, "on a little bit longer time scale."
You'll have to read the whole piece to learn how the stuff tastes.