1. Bry-Air Inc.
2. Calgon Carbon Corporation
3. Carbtrol Corporation
4. CECO Environmental Corp.
5. Chinainstru AND Quantumtech (hefei) Co.Ltd.
6. Comi Polaris Systems Inc.
7. CTP Chemisch Thermische Prozesstechnik GmbH
8. D?rr AG
9. Environmental C&C Inc.
10. Evoqua Water Technologies LLC
11. General Carbon Corporation
12. Gulf Coast Environmental Systems
LLC
13. Hiden Isochema Ltd.
14. K. C. ENGINEERS (P) LTD.
15. Kilburn Engineering Ltd.
16. MainTech Systems GmbH
17. Microtrac Retsch GmbH
18. Monroe Environmental Corp.
19. Munters
20. Newterra Corporation
21. Nichem Co.
22. Oxbow Activated Carbon LLC
23. Ravi Industries
24. RCM Technologies
25. Taikisha Ltd.