Ensuring water security will require leadership from governments and for civil society and companies to play a constructive role in public policy dialogue and implementation...[I]t is difficult for companies to mitigate water-related business risks if they only look internally; many risks stem from external factors, such as local environmental conditions and public water policy and management...[This] Guide...provides a way for companies to address risk and capture opportunities stemming from external conditions that cannot be achieved through changes in internal management alone. The goal of this Guide is to make a compelling case for responsible water policy engagement and to support it with insights, strategies, and tactics needed to do so effectively.