Oppenheim Architecture designs a Swiss water purification plant with a twist

The Swiss municipality of Muttenz now has a water purification plant with a twist. Far from the traditional industrial facility that remains off-limits to the members of the public, this innovative treatment centre is a truly interactive experience, and open to all by appointment – and who could resist taking an informative tour of how a modern facility of its kind works?
Combining technology, education and preservation, the building, designed by Miami-based Oppenheim Architecture, is swiftly becoming a new landmark for the wider Basel area. The plant’s sculptural form is distinctive. The architects aimed to work with materials that blend harmoniously with the surrounding environment; strengthening the structure’s message of sustainability along the Rhine River waterfront.
The facility's distinctive, sculptural form is becoming iconic for the area.
At the same time, the design had to address practical issues such as upkeep and a meaningful connection with its surroundings. Low maintenance, tactile shotcrete (concrete sprayed on a surface through a hose) was used for the façade and roof in order for the design to feel natural and be able to take on patina and mature together with its setting among protected woodland.
Bridging state-of-the-art technology with existing ecosystems and producing potable water of the highest standard, this project, led by practice director Chad Oppenheim, highlights exactly how iconic architecture can be both subtle and work with nature.
This water purification facility has been designed to be open to all by appointment
The structure’s defining exterior was made using shotcrete (concrete sprayed on a surface through a hose).
The architects wanted the design to blend harmoniously with the natural surroundings
And of course, the plant produces potable water of the highest standard.
INFORMATION
For more information visit the Oppenheim Architecture website
Wallpaper* Newsletter
Receive our daily digest of inspiration, escapism and design stories from around the world direct to your inbox.
Ellie Stathaki is the Architecture & Environment Director at Wallpaper*. She trained as an architect at the Aristotle University of Thessaloniki in Greece and studied architectural history at the Bartlett in London. Now an established journalist, she has been a member of the Wallpaper* team since 2006, visiting buildings across the globe and interviewing leading architects such as Tadao Ando and Rem Koolhaas. Ellie has also taken part in judging panels, moderated events, curated shows and contributed in books, such as The Contemporary House (Thames & Hudson, 2018), Glenn Sestig Architecture Diary (2020) and House London (2022).
-
Highlights from the transporting Cruise 2026 shows
The Cruise 2026 season began yesterday with a Chanel show at Lake Como, heralding the start of a series of jet-setting, destination runway shows from fashion’s biggest houses
-
Behind the design of national pavilions in Venice: three studios to know
Designing the British, Swiss and Mexican national pavilions at the Venice Architecture Biennale 2025 are three outstanding studios to know before you go
-
Premium patisserie Naya is Mayfair’s latest sweet spot
Heritage meets opulence at Naya bakery in Mayfair, London. With interiors by India Hicks and Anna Goulandris, the patisserie looks good enough to eat
-
Meet Lisbeth Sachs, the lesser known Swiss modernist architect
Pioneering Lisbeth Sachs is the Swiss architect behind the inspiration for creative collective Annexe’s reimagining of the Swiss pavilion for the Venice Architecture Biennale 2025
-
A contemporary Swiss chalet combines tradition and modernity, all with a breathtaking view
A modern take on the classic chalet in Switzerland, designed by Montalba Architects, mixes local craft with classic midcentury pieces in a refined design inside and out
-
Herzog & de Meuron’s Children’s Hospital in Zurich is a ‘miniature city’
Herzog & de Meuron’s Children’s Hospital in Zurich aims to offer a case study in forward-thinking, contemporary architecture for healthcare
-
Step inside La Tulipe, a flower-shaped brutalist beauty by Jack Vicajee Bertoli in Geneva
Sprouting from the ground, nicknamed La Tulipe, the Fondation Pour Recherches Médicales building by Jack Vicajee Bertoli is undergoing a two-phase renovation, under the guidance of Geneva architects Meier + Associé
-
Christian de Portzamparc’s Dior Geneva flagship store dazzles and flows
Dior’s Geneva flagship by French architect Christian de Portzamparc has a brand new, wavy façade that references the fashion designer's original processes using curves, cuts and light
-
An Uetikon house embraces minimalism, light, and its Swiss lake views
This Uetikon home by Pablo Pérez Palacios Arquitectos Asociados (PPAA) sets itself apart from traditional Swiss housing, with a contemporary design that connects with nature
-
CERN Science Gateway: behind the scenes at Renzo Piano’s campus in Geneva
CERN Science Gateway by Renzo Piano Building Workshop announces opening date in Switzerland, heralding a new era for groundbreaking innovation
-
Herzog & de Meuron’s SIP Main Campus weaves together nature and sculptural concrete
SIP Main Campus, a new workspace by Herzog & de Meuron, completes on the Swiss-French border