Water Supply

Centre for Affordable Water and Sanitation Technology
An organization located in Calgary, Canada dedicated to transferring water and sanitation technologies to the third world (in particular a water filter).
http://www.cawst.org/

Global Water
Develops safe, clean water supplies in developing countries around the world. List of projects, group background, and opportunities to help.
http://www.globalwater.org

Shelter, Water & Appropriate Technology Initiatives Society
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.
http://www.shelterwater.org/

Water for the Nations
Drills wells and provides well-drilling equipment to provide clean drinking water for those without. Provides training for solving problems with water supplies.
http://www.wftn.org

WaterPartners International
Addresses water supply and sanitation needs in developing countries. Promotes innovative and cost-effective community water projects with an aim for long-term success.
http://www.water.org/