Water.org is an American charity so no tax receipts for Canadians (sorry).

I will let them do the talking as far as their approach:

The water and sanitation problem in the developing world is far too big for charity alone. We are driving the water sector for new solutions, new financing models, greater transparency, and real partnerships to create lasting change. Our vision: the day when everyone in the world can take a safe drink of water.

Co-founded by Matt Damon and Gary White, Water.org is a nonprofit organization that has transformed hundreds of communities in Africa, South Asia, and Central America by providing access to safe water and sanitation.

Water.org traces its roots back to the founding of WaterPartners in 1990. In July 2009, WaterPartners merged with H2O Africa, resulting in the launch of Water.org. Water.org works with local partners to deliver innovative solutions for long-term success. Its microfinance-based WaterCredit Initiative is pioneering sustainable giving in the sector.

Back to me:
The great thing is they allow me to create my own fundraising page. Check it out: http://give.water.org/f/dollarakilometer/