One Boy from Kosovo by Trish Marx

When war drove twelve-year-old Edi and his family from their home in Kosovo, they fled across the Macedonian border to the Brazda refugee camp, a tent city that housed almost thirty thousand people. There the family shared a tent with more than twenty other people, with no kitchen, no running water, and no school for Edi to attend. Instead he helped out with the younger kids, played soccer with the other boys, and ran errands, such as waiting in the long lines for food and fresh water. Everybody was waiting in Brazda -- for news about relatives, for the war to end, for the day when they could finally go home again.

One Well - The Story of Water on Earth by Rochelle Strauss

“Imagine for a moment that all the water on Earth came from just one well. This isn’t as strange as it sounds. All water on Earth is connected, so there really is just one source – one global well – from which we all draw our water.”
Seen from space, our planet looks blue. This is because almost 70 percent of Earth's surface is covered with water. Earth is the only planet with liquid water -- and therefore the only planet that can support life. All water is connected. Every raindrop, lake, underground river and glacier is part of a single global well. Water has the power to change everything -- a single splash can sprout a seed, quench a thirst, provide a habitat, generate energy and sustain life. How we treat the water in the well will affect every species on the planet, now and for years to come. One Well shows how every one of us has the power to conserve and protect our global well. One Well is part of CitizenKid: A collection of books that inform children about the world and inspire them to be better global citizens.
http://www.youtube.com/user/CitizenKidtrailers#p/u/3/aA45mqUbfUg

An inspiring story of a young boy (grade 1) who advocated for a well in Africa. Great for young children.

Ryan and Jimmy and the Well in Africa that Brought Them Together by Herb Shoveller

It costs a lot of money to build a well in Africa – a lot more than Ryan Hreljac had thought. Still, the six year old kept doing chores around his parents’ house, even after he learned it could take him years to earn enough money. But before long, ripples of goodwill began spreading. People started sending money to help pay for Ryan’s well. His dream of building a well was about to come true.
When Ryan’s well was built in Agweo, Uganda, life in the village changed for the better: A young orphan named Akana Jimmy longed for a chance to thank Ryan in person for this gift of life – clean water. When they finally meet, an unbreakable bond unites these boys from very different backgrounds. Ryan and Jimmy is a true story of friendship and compassion in which a simple wish to help others brings focus to the necessities that unite us all. 
Check out Ryan's Well Foundation at www.ryanswell.ca

This is a fantastic novel suitable for children in grade 4 and up.

A Long Walk to Water by Linda Sue Park

Written for the Breakfast Serials audience by Linda Sue Park, author of many novels for young people, A Long Walk to Water is based on the true story of Salva, one of some 3,800 Sudanese “Lost Boys” airlifted to the United States beginning in the mid 1990’s.
Before leaving Africa, Salva’s life is one of harrowing tragedy. Separated from his family by war and forced to travel on foot through hundreds of miles of hostile territory, he survives starvation, animal attacks, and disease, and ultimately leads a group of about 150 boys to safety in Kenya. Relocated to upstate New York, Salva resourcefully learns English and continues on to college. Eventually he returns to his home region in southern Sudan to establish a foundation that installs deep-water wells in remote villages in dire need of clean water. This poignant story of Salva’s life is told side-by-side with the story of Nya, a young girl who lives today in one of those villages.