Advanced Treatment Units
- AES by Infiltrator (formerly Presby Environmental)
- BioMicrobics, Inc.
- Cape Cod Biochemical Company
- ECOPOD (by Infiltrator, formerly Delta Treatment Systems)
- Eljen Corporation
- Enviro-Aire (by Infiltrator, formerly Delta Treatment Systems)
- FujiClean USA
- Infiltrator Water Technologies, LLC
- Jet Inc.
- Norweco, Inc.
- Orenco Systems, Inc.
- Septrical, LLC
- SludgeHammer Group, Ltd.
- Smith & Loveless, Inc.
- The Dirty Bird
- Whitewater (by Infiltrator, formerly Delta Treatment Systems)