25

Percentage of the population that lives in developing countries that face water shortages because of a lack of infrastructure to fetch water from rivers and aquifers.

10

Percentage of the global population that consumes foods irrigated by waste water that can contain chemicals or disease-causing organisms.

1/2

Fraction of primary schools in the developing world that do not have access to water and sanitation facilities.

50

Years in which the amount water withdrawals have tripled due to rapid population growth.

176

Average number of gallons of water used domestically per person per day in the United States.

9

Average number of gallons of water used domestically per person per day in Ghana.

$8

Average yield gain of every $1 invested in improved water supply and sanitation.

Sources: The World Health Organization, The Clean Water Project, The Stockholm International Water Institute, The Peace Corps, The United States Geological Survey.