- Accepta Ltd.
- Albemarle Corporation
- Aquasol
- Buckman Laboratories International Inc.
- BWA Water Additives (Berwind)
- Challenge Chemicals
- Chemdrex Chemicals
- Coogee Chemicals
- Dow
- Ecolab
- Solenis (including BASF water division)
- Kemira
- Lonza
- SNF
- Veolia