Oceanhamnen in the city of Helsingborg, Sweden. Bhoff Agency/Shutterstock September 28, 2026 Water is precious – this Swedish city separates different waste sources to reuse more of it Isabell Fritz, Lund University and Ashley Hall, Lund University In Oceanhamnen, wastewater is collected through three separate pipelines, making the processing and reuse of black and greywater more efficient.
