Formally acknowledging water as a human right could encourage the international community and governments to enhance their efforts to satisfy basic human needs and to meet the Millennium Development Goals. But critical questions arise in relation to a right to water. What would be the benefits and content of such a right? What mechanisms would be required for its effective implementation? Should the duty be placed on governments alone, or should the responsibility also be borne by private actors? Is another 'academic debate' on this subject warranted when action is really what is necessary? Without claiming to prescribe the answers, this publication clearly and carefully sets out the competing arguments and the challenges.