There is increasing evidence that freshwater quality is in decline across the world. Over the past three decades, the continuous growth in volumes of untreated wastewater as well as the release of hazardous chemicals and materials into watercourses have created an urgent need to monitor and control water quality. In this sense it is both important and timely to examine different local responses to wastewater challenges that have proven their effectiveness. Where good practices exist, it is important that these be documented and shared as learning experiences and as a source of inspiration for both policymakers and practitioners looking for ways to surmount these challenges. This e-book is a response to this need, providing an overview of successful cases, procedures and processes in the implementation of wastewater legislation from different developed and developing countries around the world. This book has four objectives: First, it aims to provide an overview of wastewater legislation adopted by a range of developed and developing countries. Second, it aims to make local lessons in wastewater treatment, disposal and reuse accessible to those who may be considering reform of their own wastewater management practices. Third, it aims to promote the adoption of appropriate standards on the operation and maintenance of wastewater facilities. Finally, it aims to contribute to the exchange of wastewater legislation knowledge and best practices among experts and professionals within the field.