The 2008 Templeton Freedom Award winner, Deep Springs International a Pennsylvania group that coordinates the work of NGOs (which provide point-of-use water treatment technologies that are relatively inexpensive – about $3 to $80), microfinance institutes (which provide money to train the poor and to help them start businesses), and local schools and institutions (which usually don’t focus on water treatment).
Deep Springs has a number of ways you can help them, from donating, to buying items on their page, to changing your search engine to
Good Search and iGive.
Remember that gold mining is one of the worst offenders in using up water. So if you do hold physical gold (I don’t and it’s one of the reasons I don’t), remember you may be contributing to water problems in those areas and have some responsibility to help where you can.