Nearly half the people who gained access to water between 1990 and 2010 live in India and China.
(WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation 2012)

One study estimates that funding for water and sanitation infrastructure is lacking by US$115 million a year in Sub-Saharan countries. (Africa Infrastructure Country Diagnostic (AICD) Study), while WHO gives a global estimate of $535 billion needed in new capital investment to reach universal access, or $26.75 billion per year between 2010 and 2030. (Hutton, WHO, 2012)

For every $1 invested in water and sanitation, an average of at least $4 is returned in increased productivity.
(Hutton, Global costs and benefits of drinking-water supply and sanitation interventions to reach the MDG target and universal coverage, WHO, Geneva, 2012: page 4)

Around 315,000 children under-five die every day from diarrhoeal diseases caused by dirty water and poor sanitation. That's 900 children per day, or one child every two minutes.
(WHO/UNICEF 2015)

More than 650 million people in the world do not have access to safe water.
(WHO/UNICEF Joint Monitoring Programme (JMP) Report 2015 update)