| Acquacampania |
| Adisseo |
| Aeroport de Paris |
| Agence de L'Eau Artois Picardie |
| Air Liquide |
| Air Liquide Italie |
| Akzo Nobel T&E |
| ARAMCO Overseas Company BV |
| AREVA |
| Arkema |
| AWE |
| Axens |
| BAE Systems |
| BIS Prozesstechnik GmbH |
| BP PLC |
| BP Refinery Rotterdam BV |
| CETIAT |
| Chiyoda Corporation |
| C&TSi BV |
| DCNS |
| DGA |
| DOW Benelux |
| DSM BV |
| Du Pont de Nemours BV |
| EADS/AIRBUS |
| EDF |
| EDF Energy Nuclear Generation Ltd |
| ENEL Generazione |
| ESSO NL |
| ExxonMobil Chemicals Holland BV |
| GDF Suez |
| Health & Safety Executive |
| Heineken SCS |
| INEOS |
| INERIS |
| INRS |
| Intertek Polychemlab |
| IRA |
| KEMA Nederland BV |
| Kuwait Petroleum Europoort BV |
| Laborelec, GDF Suez |
| Lanxess |
| LNE |
| Lubrizol France |
| Lyondell Basell |
| M+W Process Automation cvba |
| Magnox Ltd |
| Metropolitana Milanese |
| Momentive Specialty Chemicals BV |
| MSD |
| Nantes Metropole – Direction de l’Eau |
| Nederlands Meetinstituut-NMi |
| NEL |
| NPL Management Ltd |
| Petro SA |
| Polimeri Europa |
| RATP |
| Renault SA |
| RHODIA |
| Rolls-Royce Submarines |
| SABIC |
| SANOFI PASTEUR |
| Sellafield Ltd |
| Shell Global Solutions International BV |
| ShinEtsu-PVC BV |
| Siciliacque |
| SIP Standardiserad Instrumentprovning |
| SNCF |
| Solvay SA |
| Sorical |
| Suez Environnement |
| Total |
| Total Technologie SA |
| Universitá di Genova |
| Urenco ChemPlants Ltd |
| Waternet |
| Wintershall Noordzee BV |
| Véolia eau |
