Many experts claim that a Third World War is most likely to occur because of the growing conflicts over water. This pure substance, which is essential for life on earth, has become an issue of common concern to all nations. The great powers, for instance, give top priority to water availability and sustainability when they develop their policies and strategies.

To prevent and resolve water disputes, the international community has set many rules regarding the sustainable, efficient and equitable use of water. These rules, which are enshrined in international law, vary from state to state because they mainly deal with transboundary waters. Under these rules, states are expected to conserve water, ensure an equitable access to it and prevent the deliberate destruction of water supply systems especially during periods of armed conflicts. The purpose of this study is to examine these rules and assess their effectiveness.