This quote showcases the situation of a lack of clean water masterfully.
“Where adequate water treatment is not readily available, the impact on public health can be devastating. Worldwide, about 1.2 billion people lack access to safe drinking water, and twice that many lack adequate sanitation. As a result, the World Health Organization estimates that 3.4 million people, mostly children, die every year from water-related diseases.”
http://www.waterandhealth.org/drinkingwater/wp.html