According to the World Health Organization, 785 million people lack a basic drinking-water service, including 144 million people who are dependent on surface water.
Globally, at least 2 billion people use a drinking water source contaminated with faecets.
Contaminated water can transmit diseases such as diarrhea, cholera, dysentery, typhoid, and polio. In lesser developed countries, 22% of health care facilities have no water service, 21% no sanitation service, and 22% no waste management service.