2.3 billion worldwide lack proper latrines, basic sanitation facilities and 892 million still defecate in the open, according to World Health Organization.
“Today, some 157 million urban dwellers—that would be 37 percent of the urban population—lack a safe and private toilet. Even sewers are no guarantors of healthiness: In the capitol city of Delhi, pipes are corroded; they ooze waste; and nearly a third of the booming city isn’t connected to underground lines.
Many latrines flush into open drains, and 4 percent—some 700,000—of this urban population still defecate outdoors. Only 56 percent of the sewers are safely managed.”