Water is an important resource for industry and agriculture. To remain resilient against i) water shortage due to e.g. climate change or groundwater depletion and 2) increased water prices, water reuse should be considered. This project aims to realise water symbiosis cases in which water is being exchanged and being reused between different actors. The cases will act as an example in terms of technical requirements, legal boundries, economic benefits and social acceptance. Cross-border cooperation on this theme is desirable to learn from the synergies and differences between the countries. Water symbiosis realisations will contribute to a circular economy.