| STRATEGIC COMMUNITY ADAPTATION & RESILIENCE TECHNOLOGIES CIC | 17480998 | Southampton | 25 September 2026 | Active |
| J&M PURE WATER LTD | 17474934 | Tunbridge Wells | 22 September 2026 | Active |
| AQUAPURA-SOLUTIONS LTD | 17472563 | London | 22 September 2026 | Active |
| PURE RAIN SYSTEMS LTD | 17460988 | Alresford | 15 September 2026 | Active |
| SRH METERING LTD | 17452991 | Princes Risborough | 11 September 2026 | Active |
| AURORA UTILITIES (WATER) LIMITED | 17451633 | London | 10 September 2026 | Active |
| PARKFORCE GROUP LTD | 17449945 | London | 9 September 2026 | Active |
| WATER SERVICES LTD | 17445526 | Sheffield | 8 September 2026 | Active |
| PURE WATER STATION LTD | 17446218 | Witham | 8 September 2026 | Active |
| AFRICA ACCESS WATER UK LTD | 17447723 | London | 8 September 2026 | Active |
| EL3MENTAL LTD | 17442077 | Bridgnorth | 6 September 2026 | Active |
| SSWM SILLITTO SOLUTIONS WASTE MANAGMENT LTD | 17441402 | London | 5 September 2026 | Active |
| HYDRAHOUND H2O LTD | 17434768 | Southampton | 2 September 2026 | Active |
| SWEET WATER SOLUTIONS LTD | 17430392 | Fordcombe | 1 September 2026 | Active |
| RAPID PROPERTY MAINTENANCE LTD | 17418069 | Southend-On-Sea | 24 August 2026 | Active |
| CALAD'ASSAINISSEMENT LTD | 17414464 | London | 21 August 2026 | Active |
| RAINFRAME LIMITED | 17410723 | Leeds | 20 August 2026 | Active |
| BETA WATER SOLUTIONS LTD | 17408200 | Scarborough | 19 August 2026 | Active |
| WATER SQUIRREL LTD | 17407258 | Scarborough | 18 August 2026 | Active |
| NUWATER UK LTD | 17403426 | Dartford | 17 August 2026 | Active - Proposal to Strike off |
| CLEARFLOW LEAK DETECTION & WATER MANAGEMENT LTD | 17402190 | London | 15 August 2026 | Active |
| ELITE WATER & ENERGY CONTRACTS LTD | SC899185 | Bellshill | 14 August 2026 | Active |
| PIPE-LINE INFRASTRUCTURE UK LTD | 17389606 | Northampton | 10 August 2026 | Active |
| WATER MANAGEMENT(SOUTH) LIMITED | 17387590 | North Baddesley | 7 August 2026 | Active |
| H2O ZERO LIMITED | 17383381 | Bromborough | 5 August 2026 | Active |
| NEDUNTHEEVU DESALINATION CENTRE | 17373472 | Abergavenny | 31 July 2026 | Active |
| J&D UTILITIES LTD | 17366513 | Barnsley | 28 July 2026 | Active |
| TASNEEM ELGAMMAL LTD | 17358393 | London | 23 July 2026 | Active |
| THE WATER CLUB GROUP LTD | 17352008 | Leeds | 21 July 2026 | Active |
| YORKSHIRE LEGIONELLA CONTROL LTD | 17342826 | Hull | 16 July 2026 | Active |
| OLYMPUS CRYSTALINE WATER FILTERS LIMITED | 17343082 | Rochford | 16 July 2026 | Active |
| HIGHLAND WATER SERVICES LTD | SC896101 | Glasgow | 15 July 2026 | Active |
| AQUATECH (S&L) LIMITED | 17337260 | London | 13 July 2026 | Active |
| INFRASTRUCTURE SOLUTIONS AND CONSULTANCY GROUP LIMITED | 17331273 | Nottingham | 9 July 2026 | Active |
| SADKA JARIYA RELIEF ORGANISATION CIC | 17314946 | Rochdale | 2 July 2026 | Active |
| GEOMEMBRANE LINING SOLUTIONS LTD | 17311664 | Rugeley | 1 July 2026 | Active |
| CHILTERN WATER SYSTEMS LIMITED | 17293436 | Aylesbury | 22 June 2026 | Active |
| WTTECH LTD | 17292139 | London | 21 June 2026 | Active |
| BLUFOX ENVIRONMENTAL COMPANY LIMITED | 17274852 | London | 17 June 2026 | Active |
| ATMOSPHERIC WATER ENTERPRISES LTD | 17278322 | London | 17 June 2026 | Active |
| CAYSER WATER SYSTEMS LTD | 17264510 | Maidstone | 5 June 2026 | Active |
| CORE WATER SOLUTIONS LIMITED | 17260959 | Okehampton | 4 June 2026 | Active |
| BEMORE LOGISTICS LTD | 17256040 | Basingstoke | 2 June 2026 | Active |
| AFRIWATER LTD | 17256738 | Leeds | 2 June 2026 | Active |
| SOJ SERVICES LTD | 17252355 | Birmingham | 1 June 2026 | Active |
| COMPLETE CONSULTANT SERVICES LTD | 17253103 | London | 1 June 2026 | Not in the latest register snapshot (dissolved or removed) |
| S CARRINGTON SERVICES LIMITED | 17249000 | Bewdley | 29 May 2026 | Active |
| FITZPATRICK ENVIRONMENTAL LTD | 17248777 | Margate | 29 May 2026 | Active |
| A&M UTILITIES LTD | 17247449 | Barnsley | 28 May 2026 | Active |
| AQUASAFECOMPLIANCESERVICES LTD | 17232452 | London | 20 May 2026 | Active |