| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALS ENVIRONMENTAL LIMITED | 02148934 | 01/08/1995 | 31/03/2000 | Dissolved |
| AZTEC ENVIRONMENTAL CONTROL LIMITED | 01361365 | 17/06/1993 | 31/05/1993 | Dissolved |
| Arcrite Ltd | 03511397 | 29/07/1998 | 31/03/2000 | Dissolved |
| Arcrite Membrane Systems Ltd | 03262932 | 29/07/1998 | 31/03/2000 | Dissolved |
| Arcrite Process Systems (U K) Ltd | 03257842 | 29/07/1998 | 31/03/2000 | Dissolved |
| Arcrite Water Services Ltd | 03220650 | 29/07/1998 | 31/03/2000 | Dissolved |
| DE NORA WATER TECHNOLOGIES UK SERVICES LIMITED | 01254271 | 25/08/1994 | 31/03/2000 | Amber |
| Melcon Water International Ltd | 01319554 | 17/06/1993 | 31/03/2000 | Dissolved |
| Minworth Contracting Ltd | 03365994 | 30/04/1997 | 31/03/2000 | Dissolved |
| Minworth Systems Ltd | 02319641 | 07/06/1993 | 13/05/1994 | Dissolved |
| Paperflow Services Ltd | 02785434 | 16/02/1993 | 31/03/2000 | Dissolved |
| SEVERN TRENT HOME SERVICES LIMITED | 02626955 | 17/06/1993 | 31/03/2000 | Dissolved |
| SEVERN TRENT METERING SERVICES LIMITED | 02569703 | 16/02/1993 | 31/03/2000 | Silver |
| SEVERN TRENT SERVICES PURIFICATION LIMITED | 02409826 | 28/12/1992 | 31/03/2000 | Dissolved |
| SEVERN TRENT WATER LIMITED | 02366686 | 22/08/1992 | 31/12/1992 | Silver |
| ST DELTA LIMITED | 02409795 | 11/01/1993 | 01/04/1993 | Dissolved |
| Severn Trent (G.T.) Ltd | 02810305 | 03/06/1993 | 31/03/2000 | Dissolved |
| Stoner Associates Europe Ltd | 02593248 | 20/03/1993 | 31/03/1995 | Dissolved |
| TETRA EUROPE LIMITED | 02648443 | 01/02/1993 | 31/03/2000 | Dissolved |