Carlos Whittaker has blogged about an initiative of Water Missions International to provide clean water to as many of their remaining communities as they can through text donations of $10.
Water Missions International is an engineering relief and development Christian nonprofit that seeks to provide sustainable and safe water solutions to people in 40 developing countries and disaster victims worldwide. They currently have 125+ communities waiting for funding to get safe water, with the communities averaging around 2500 people. This initiative is focused on providing the funding for as many of those communities as possible.