The world water markets are facing several challenges. The growing population of the world is causing increasing pressures on food, energy and services related to basic consumption. Investment in water infra-structures around the world to satisfy the increasing needs will be different in different countries. Water is needs in all society and investments will vary from one country to another depending on existing conditions, technologies and needs. Countries in arid and semi-arid regions, and countries with high population will need relatively much more resources to invest in water infra-structures.