This paper reports on a study water security issues in Asia evaluating issues related to long term security highlighting implications for Australia. Asia water problems are severe with one in five people not having access to safe drinking water. Water security is defined as the availability of an acceptable quantity and quality of water for health, livelihoods, ecosystems and production, coupled with an acceptable level of water-related risks to people, environments and economies. It is a function of access to adequate quantities of water, of acceptable quality, for human and environmental users. This analysis shows many Asian countries face great challenges from population explosion, rapid shifts from rural to urban areas, dietary changes as countries develop, pollution of water resources, over-abstraction of groundwater and climate change among other factors. There is a need to mobilize technologies, techniques, and capacity to aid security issues in Asia urgently. Otherwise, population growth, rapid urbanisation and climate change issues will worsen water security placing unwanted demands on countries like Australia. Reducing its destructive potential and increasing its productive potential is a central challenge but imperative for the sake of future generations in Asia.