WaterPartners International - http://www.water.org/ Addresses water supply and sanitation needs in developing countries. Promotes innovative and cost-effective community water projects with an aim for long-term success.
Global Water - http://www.globalwater.org Develops safe, clean water supplies in developing countries around the world. List of projects, group background, and opportunities to help.
Water for the Nations - http://www.wftn.org Drills wells and provides well-drilling equipment to provide clean drinking water for those without. Provides training for solving problems with water supplies.
Centre for Affordable Water and Sanitation Technology - http://www.cawst.org/ An organization located in Calgary, Canada dedicated to transferring water and sanitation technologies to the third world (in particular a water filter).
Shelter, Water & Appropriate Technology Initiatives Society - http://www.shelterwater.org/ A humanitarian organization in India with projects relating to shelter for the poor, sustainable water supply, rainwater harvesting and watershed management, reproductive health and education.
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