Situated between several interdependent political and economic zones of southern China's Pearl River Delta, the Pearl River Delta Special Ecological Area (PRD SEA) project explores the possibility that regional administrative boundaries could be softened and redrawn along ecological boundaries. With the advent of global sea level rise and its impact on the fragile fresh water ecology and huge population of the Pearl River Delta, the project proposes novel ways to share fresh water and wastewater across political zones to better administer and profit from the distribution of water resources. Climate change, urbanization, and pollution from industrial and agricultural development threaten the steady supply of fresh water to the Pearl River Delta and its cities, while population growth in the region only increases demand. At the same time, Hong Kong, Macau and Shenzhen's increasing economic, political and cultural interdependency presents the possibility to tackle these challenges holistically. Layering a regional water resource infrastructure onto existing and new industrial, residential, agricultural and transportation armatures would transcend borders and create new economic markets through ecologically sustainable practices.