- Accepta The Water Treatment Products Company
- Akzo Nobel NV
- Albemarle Corporation
- American Water Chemicals Inc.
- Arkema Group
- Avista Technologies Inc.
- BASF SE
- Chemtex Speciality Limited
- Chemtrade Logistics Inc.
- ChemTreat Inc.
- DuPont.
- Ecolab
- Kemira
- Lonza
- Solenis
- Solvay
- SUEZ
- Thermax Global
- Veolia