The Safe Water System is a water quality intervention that employs simple, inexpensive and robust technologies appropriate for the developing world.
For a general overview of water and sanitation issues worldwide, WaterAid's site is dedicated to helping people obtain safe water and effective sanitation systems. There is a learning zone for students which provides a broad understanding of water, sanitation and hygiene education. Further pages link to Technology Notes that outline technologies that are used by WaterAid in their work.
The World's Water is a site dedicated to providing up-to-date water information, data, and web connections to organisations, institutions, and individuals working on a wide range of global freshwater problems and solutions.