In hundreds of villages in South Asia...survivors pick through the debris, bury their dead, begin to rebuild lives, but remain at risk. Thousands more could die in the months ahead from water borne diseases. Clean water will be as essential as shelter and food as the region recovers. But infrastructure in many cases is totally destroyed. Even towns and villages that had electrical power and sort of water treatment will be without for some time. It's a huge problem. Among those helping solve it...a small company tucked away on the second floor of this building in a snow clad valley a half world from the disaster area in the tropics. Greg Hanson and his staff build water purification systems here. Portable systems that run on solar energy and turnout gallons of pure water. The system she's assembling will be shipped out this week. Ten are there already in the hands of relief teams from the U-N, Red Cross and missionary agencies. Three more will be shipped today. Another dozen by Monday. The small units can turn out 50 gallons of pure water a day, large ones can supply the needs of a whole village. Hanson has been in this business for years. The walls of his plant are decorated with photos of his units being used in remote locations all over the world. He normally turns out 30 a month. That figure is likely to change very quickly. The tsunami has created a huge on-going need for this equipment. This is a business, but Hanson says, there's extra satisfaction in knowing how his product will be used.