Protecting waterfor the future
At Zereau, we create solutions that help hospitals tackle medical wastewater pollution, protect water resources and unlock opportunities for waste reduction and raw material recovery.
At Zereau, we create solutions that help hospitals tackle medical wastewater pollution, protect water resources and unlock opportunities for waste reduction and raw material recovery.
Our mission
Healthcare exists to treat and heal. Yet administered medicines can leave harmful traces in water, mainly through patient excretion. Zereau captures these residues at the source — before they dilute, disperse and reach the environment.
Capture residues at the source.
What we do
Zereau develops on-site source-based filtration systems that remove pharmaceutical and hazardous residues directly within hospital departments.
By capturing contaminants at the point of care, we prevent them from entering wastewater systems and the wider environment.
Installed at the point of care
Fits therapy rooms, wards and preparation areas. Connects to sanitary structures easily, without infrastructure changes.
Designed for hospital environments
Designed to fit your clinical routines, occupational safety and infection control, without adding work for staff or affecting patient comfort.
Proven filtration performance
Removal rates are proven and monitored in live operations, giving hospitals measurable data to support sustainability goals and respond to growing regulatory expectations.
Team
Built by people who understand the system and the sector
Zereau brings together expertise in healthcare, engineering and environmental science.
We work closely with hospitals and partners to design solutions that fit real-world workflows.
Our services
- 01 — AnalysisUnderstand the water challengeWe analyse medical wastewater, identify relevant contaminants and map where they enter the water system. This gives us the insight needed to determine the right treatment approach.
- 02 — DevelopmentDevelop the right solutionWe develop and engineer treatment solutions for specific medical water challenges — from removing contaminants to recovering valuable resources and enabling water reuse.
- 03 — Engineering & installationFrom design to operationWe engineer, build, test and install our systems at the point where they are needed. Solutions can be adapted to individual departments, specific patient flows or hospital-wide applications.
- 04 — Monitoring & serviceKeep systems performingWe monitor, optimise and maintain our systems to ensure reliable performance over time. We also train technical teams and service partners to support day-to-day operation and maintenance.
Newsroom
October 8, 2026
EANM 2026: Zereau at Booth 321 – hall X3. Is Our Infrastructure Ready for the Growth of Nuclear Medicine?
Next week, the nuclear medicine community comes together in Vienna for EANM’26. Radioligand therapy is expanding. New radiopharmaceuticals are moving through clinical development. Alpha therapies are gaining momentum. Patient access is increasing, and hospitals across Europe are preparing for further growth.
October 1, 2026
Polluter Pays. But for What, Exactly?
April 21, 2026
Clean Water Starts at the Source. Why treating healthcare micropollutants before dilution deserves a bigger role in our water strategy.
February 3, 2026