In the last two decades, more than 1.7 billion people in the Asia-Pacific region have gained access to safe water. Yet, there is acute water shortage in many parts of the region. No developing country in the region is having reliable availability of clean water. Growing population, pollution, expanding industrializing economies, water-related disasters and climate change are some of the key reasons for the shortage of clean water. The National Water Security Index developed by the Asian Water Development Outlook (AWDO) measures how far countries have progressed to secure reliable supplies of clean water. The index combines vet dimensions of water security, measured by key dimensions (KD), so besides household water security there is economic water.