Thanks to Nilam Agrawal for informing me about the important work of Sustainable Innovations:

Sustainable Innovations is a non-profit corporation committed to serving vulnerable populations through innovations in systems, science, engineering and social enterprises. We take pride in finding out-of-box approaches to problems that have defied solution.

This organization is currently working on developing rainwater harvesting systems for villages in arid Rajasthan, India.

Check the Sustainable Innovations website for updates.