1. 3M Company
2. Agape Water Solutions Inc.
3. Applied Membranes Inc.
4. Aqua Filsep Inc.
5. Aqua Systems Technology
6. Aquachem Brand by Angstrom Engineering
7. Brio Water Technology Inc.
8. Dupont De Nemours Inc.
9. Eralp Kimya
10. Evoqua Water Technologies LLC
11. General Electric Company
12. Guangzhou Chunke Environmental Technology Co. Ltd.
13. Hinada Water Treatment Tech Co. Ltd.
14. HydroNovation
15. Iontech-EDI
16. Kurita Water Industries Ltd.
17. Marmon Holdings Inc.
18. MEGA A.S.
19. Merck KGaA
20. Newterra Corporation
21. Organo Corporation
22. OSMO SISTEMI S.r.l. by Caramondani Bros Public Company Ltd.
23. Ovivo Inc.
24. Progressive Water Treatment Inc. by OriginClear Inc.
25. Pure Aqua Inc.
26. Pureflow Inc.
27. Qua Group LLC
28. Real Water Tech Co. Ltd.
29. Samco Technologies Inc.
30. Samyang Corporation
31. Silhorko-Eurowater A/S by Grundfos Holding A/S
32. SnowPure LLC
33. Veolia Environnement SA
34. WesTech Engineering
LLC