1. 3M Company
2. Akron Porcelain & Plastics Co.
3. Anguil Environmental Systems Inc.
4. Aqua Cure Ltd.
5. Aquacera by Ceramic Filters Company Inc.
6. ASK Chemicals GmbH
7. Ceramic Water Filter Cartridge
8. CFF GmbH & Co. KG
9. Clear Edge Filtration
10. Corning Incorporated
11. Doulton Ceramics
12. Eastman Chemical Company
13. Glosfume Technologies Ltd.
14. Haldor Topsoe A/S
15. Kyocera Corporation
16. LENZING AG
17. Pall Corporation
18. Pargreen Process Technologies
19. PRATIK CERAMICS
20. S. G. Frantz Co. Inc.
21. Seema Minerals & Metals
22. SpinTek Filtration Inc.
23. Tri-Mer Corporation
24. Unifrax I Llc
25. Veolia Environnement S.A.