Aerobic Treatment
- Aerzen
- Anue Water Technologies
- Byo-Gon, Inc.
- Centrisys/CNP
- Clean Water Technology
- Delta Treatment Systems, LLC
- Environetics, Inc.
- Evoqua Water Technologies LLC
- Headworks International, Inc.
- Howden
- Hydro-Thermal Corporation
- Linde
- Lone Star Blower and Compressor
- Moleaer
- Pick Heaters, Inc.
- Triplepoint Environmental