Providing reliable and safe drinking water through a piped water system in Bangkok has enormous challenges owing to the city's physiographic and demographic characteristics. However, with its commitment to good corporate governance principles and practices, the implementation of required measures by the Metropolitan Waterworks Authority (MWA) has resulted in significant improvements in water supply services in Bangkok. At present, almost 100% of the population are provided with reliable and safe tap water through the state-run utility which has achieved a remarkable financial performance. The article presents and discusses the factors responsible for the achievements by the MWA to draw lessons for public policy and good practices which can be replicated in other urban areas, especially in developing countries. Moreover, areas for further improvement are suggested for better performance and quality of water services.