These are some of the more current statistics you will see in the Clean Water market: 

• 880 million people lack access to Clean Water
• 5,000 children die every day from water related illness
• 50% of the world’s hospitalizations are due to water related disease
• Over 50% of water projects fail in the first few years
• <5% of projects are visited, and far less than one percent have any longer-term monitoring.
• 5.5 billion adult productive days are lost every year due to diarrheal diseases
• 40 billion hours are lost every year due to time spent fetching water in sub-Saharan Africa
• $15 – $20 can provide Clean Water for one person for life (or at least 20 years)

This is an engaging page of common statistics with documentation: http://water.org/learn-about-the-water-crisis/facts/#economics