Water Access Index (WA) — percent of the population having no access to potable water. According to World Health Organization (WHO) and Children's fund of the United Nations (UNICEF), one more danger is connected with diminishing access of people to clean potable water and sanitary means. The fifth part of mankind (more than 1,1 billion people) has no access to potable water, and 2,4 billion person are not provided with minimum sanitary conditions. In this connection 2003 was declared by the General Assembly of the United Nations International year of fresh water, and the period from 2005 to 2015, starting from the International day of water resources (March 22, 2005) — the International decade of actions« “Water for a life”.