I am a professional environmental engineer that just started specializing in a cooling tower water conservation technology. Similar to the discussion previously this technology softens the water without the addition of chemicals and prevents corrosion and scaling allowing the cycles of concentration to increase.

The technology can get up to 3 LEED credits. It was established a few years ago and will hopefully gain momentum once the news spreads. Cooling tower water is such a significant fresh water user and this technology can make a large impact. Please feel free to contact me if you would like further information.