The MOOC “Sustainable Urban Water Systems” aims to provide knowledge about modern and sustainable solutions for urban water management in water-sensitive cities. The focus is on stormwater control and water supply strategies for the mitigation of effects on the water cycles due to human settlements and climate change. In particular, the integration of Nature-based Solutions (NbS) into urban drainage systems, the use of alternative water resources, and the reduction of losses and waste, make cities more resilient and add benefits to both the environment and community.