- Aqua-Aerobic Systems, Inc.
- Atlantic Ultraviolet Corporation
- AUC Group
- Clean Water Technology
- Emmons Metro
- EnBiorganic Technologies
- Headworks International, Inc.
- HUBER Technology, LLC
- Mazzei Injector Company, LLC
- Metropolitan Industries, Inc.
- MHF Services (IFCO)
- NOV Fiber Glass Systems
- Pieralisi North America
- Satellite Industries
- Seven Seas Water Group
- Smith & Loveless, Inc.
- Valworx
- Veolia
- WaterSurplus
- WSG & Solutions
