The City of Muttenz, Switzerland has commissioned OAD Europe to design the city’s new municipal water purification plant. The plant is a model of sustainability, extremely sensitive to its contrasting setting near the Rhine riverfront. Settled between the protected forest and the nearby industrial parks, the project will exhibit an educational factor to express the complex purification process in such a stressed environment. The unique and important function of the drinking water treatment plant is to create an expressive building – a new landmark for the town of Muttenz and the Basel area. The role of the architecture is to link and express the unique and state-of-the-art technology, placed in a natural ecosystem and emphasizing the importance of the purification process.