as has been pointed out, there is so little actually usable water in the world. along with efforts to make sure that people have free or cheap access to water, some of us must also look at ourselves. for those of us like myself that live in the parts of world that use the most water, we must REDUCE our use of water.
in truth, i feel guilty every time i take a shower, because i know that many people don't have clean water to live on, let alone bathe with.
i also want to mention this blog post by @kate, about bottled water:
in general, we just need to stop wasting water; my challenge to Urgent Evoke agents is to see if you can reduce your water usage by 25% percent, according to the volume posted on your water bill. there are tons of little ways we can do that; here's a few starters. put a few bricks in the toilet chamber and flush less often. time your showers and use conservative shower heads. don't use a dishwasher.
the other problem is all of the profiteering from providing water to people, especially in developing nations. they are using supply/demand economics to determine the cost of a necessity of LIFE.
remember, seek the TRUTH!