MULTISOURCE is an EU-funded project that will facilitate the systematic, city-wide planning of nature-based solutions for urban water treatment, storage, and reuse. Through seven technical pilots across Europe and USA, a wide range of urban waters will be treated throughout the project, while decision support tools will be co-designed together with local, national, and international stakeholders. NIVA and the City of Oslo together with 18 other partners are working on the treatment and reuse of urban stormwater using nature-based treatment solutions. The Norwegian pilot treats road runoff from Tåsenveien.