The considerable growth of so-called "developing" cities is not accompanied by the infrastructure and facilities needed to ensure decent living conditions for the poor. Urban water supply and sanitation systems are too often in a dilapidated state and are unable to cope with the needs. Despite these conditions, the number of new entrants continues to grow while many will be excluded from these services.
African cities, which have the highest rate of urbanization in the world, are overtaken by the speed at which this change is taking place. Sub-Saharan cities will need to accommodate an additional 340 million people over the next 20 years. An estimate of the investment required for the corresponding development operations is $45 billion per year.