- Acquaint B.V.
- CIV Water
- DMT Environmental technology
- Douna Group
- Empower people
- Essentra
- Fleet Cleaner
- Flovac
- Foru-Solution
- H2O job
- Hydrosource
- HydrowashR
- ISS Tanks
- IWC Innovative Water Concepts
- KNN Cellulose
- Magliv Corporation
- Martec Nederland
- Oosterhof-Holman Milieutechniek
- PB International
- Solteq Energy
- Stork
- Upfall BV
- Water Applicatie centrum
- Westt
- Wetsalt
- World Trade Center Leeuwarden
