1. 3M Company
2. Accepta Water Treatment
3. Aquatech International LLC
4. BWT Holding GmbH
5. Calgon Carbon Corporation by Kuraray Co. Ltd.
6. Chembond Chemicals Limited
7. Culligan International Company
8. Danaher Corporation
9. Doosan Corporation
10. DuPont de Nemours Inc.
11. Ecolab Inc.
12. Evoqua Water Technologies LLC
13. General Electric Company
14. Hitachi
Ltd.
15. Siemens AG