My cousin’s Kibbutz Amiad develops products for wastewater treatment. Recently a delegation of Israeli water companies, including Amiad visited Chile, where mining requires large quantities of water. Amiad’s systems help countries like Chile make better use of their water. They were even on the BBC.
http://www.israelnewtech.com/2011/12/mining-for-water-efficiency-technologies/
http://www.amiad.com/files/BBC_world_news_10-11-2011.pdf
http://www.bbc.co.uk/mediacentre/worldnews/071111-horizons-water.html