| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| C & W Ltd | 01688835 | 05/05/2000 | Dissolved |
| Conserva Ltd | 04149419 | 17/10/2001 | Dissolved |
| Cremer & Warner Ltd | 01306775 | 23/11/2000 | Dissolved |
| Fisheries Development Ltd | 01631131 | 24/09/1993 | Dissolved |
| Halcrow-U L G Ltd | 01318086 | 30/11/2005 | Dissolved |
| International Training Consortium Ltd | 01218888 | 04/11/1993 | Dissolved |
| Newcastle & Gateshead Water Ltd | 02560617 | 05/05/2000 | Dissolved |
| North East Water Commercial Services Ltd | 02673065 | 05/05/2000 | Dissolved |
| North East Water Ltd | 02560626 | 30/06/2000 | Dissolved |
| Northumbrian Water Environmental Trust Ltd | 03384890 | 31/12/2001 | Dissolved |
| Northumbrian Water Services Ltd | 02355435 | 30/06/2000 | Dissolved |
| Suffolk Water Ltd | 02573318 | 09/02/2001 | Dissolved |
| Suffolk Water Ltd | 02573318 | 28/04/2000 | Dissolved |
| Sunderland & South Shields Water (Trustee) Co Ltd | 00732164 | 05/05/2000 | Dissolved |
| Wallace, Whittle & Partners Ltd | SC111182 | 05/05/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AYR ENVIRONMENTAL SERVICES LIMITED | SC198368 | 02/09/1999 | 10/11/1999 | Bronze |
| AYR ENVIRONMENTAL SERVICES OPERATIONS LIMITED | SC201810 | 07/12/1999 | 20/04/2001 | One Red Flag |
| Accessace Ltd | 02309869 | 09/05/1992 | 16/03/2001 | Dissolved |
| CALEDONIAN ENVIRONMENTAL LEVENMOUTH TREATMENT SERVICES LIMITED | 03991397 | 12/05/2000 | 14/12/2000 | Gold |
| CALEDONIAN ENVIRONMENTAL SERVICES HOLDINGS LIMITED | 03936960 | 01/03/2000 | 20/04/2001 | Silver |
| CALEDONIAN ENVIRONMENTAL SERVICES PLC | SC156608 | 15/10/1999 | 20/04/2001 | Silver |
| CPCR LIMITED | 02701409 | 07/07/1992 | 20/03/2001 | Dissolved |
| Cremer & Warner Ltd | 01306775 | 30/06/2000 | 08/08/2002 | Dissolved |
| EDEN SPRINGS UK LIMITED | 04063744 | 27/09/2000 | 28/11/2001 | Bronze |
| ENTEC EUROPE LIMITED | 02331160 | 30/06/2000 | 08/08/2002 | Dissolved |
| EUROWATER LIMITED | 02864846 | 05/02/2001 | 20/10/2001 | Gold |
| EUROWATER LIMITED | 02864846 | 05/02/2001 | 20/10/2001 | Gold |
| Gould Rural Environment Ltd | 00622216 | 30/06/2000 | 08/08/2002 | Dissolved |
| Gould Rural Environment Ltd | 00622216 | 05/05/2000 | 01/06/2005 | Dissolved |
| Hydrotechnica Ltd | 01340388 | 30/06/2000 | 08/08/2002 | Dissolved |
| Hydrotechnica Ltd | 01340388 | 05/05/2000 | 01/06/2005 | Dissolved |
| LYONNAISE UK WATER SERVICES LIMITED | 01937162 | 23/02/2001 | 20/10/2003 | Dissolved |
| LYONNAISE UK WATER SERVICES LIMITED | 01937162 | 23/02/2001 | 23/05/2003 | Dissolved |
| NORTHUMBRIAN SPRING LIMITED | 02587288 | 29/09/2000 | 28/11/2001 | Dissolved |
| NORTHUMBRIAN WATER SHARE SCHEME TRUSTEES LIMITED | 02331130 | 05/05/2000 | 05/01/2004 | Not Trading |
| NSI INDUSTRIAL O&M SOLUTIONS LTD | 02528695 | 30/06/2000 | 26/05/2003 | One Red Flag |
| PALM WATER COMPANY LIMITED | 02251090 | 29/09/2000 | 28/11/2001 | Dissolved |
| ULG INTERNATIONAL LIMITED | 00937426 | 24/09/1993 | 10/04/2006 | Not Trading |
| UNITED LIVING WATER LIMITED | 02673066 | 24/06/2005 | 08/07/2005 | Bronze |
| UNITED WATER UK LIMITED | 03198718 | 23/12/2002 | 20/10/2003 | Dissolved |
| WATER COOLERS (RENTALS) LIMITED | 02434673 | 29/09/2000 | 28/11/2001 | Dissolved |
| WATER SERVICES LIMITED | 01923718 | 09/02/2001 | 20/10/2003 | Dissolved |
| WATER SERVICES LIMITED | 01923718 | 01/07/2001 | 23/05/2003 | Dissolved |
| WATERCOOLERS GROUP LIMITED | 02297803 | 29/09/2000 | 28/11/2001 | Dissolved |
| WATERCOOLERS LIMITED | 00929622 | 29/09/2000 | 28/11/2001 | Dissolved |
| WSP ENVIRONMENT & INFRASTRUCTURE SOLUTIONS UK LIMITED | 02190074 | 01/04/2004 | 04/10/2005 | Gold |
| Wallace, Whittle & Partners Ltd | SC111182 | 30/06/2000 | 08/08/2002 | Dissolved |