| FOREMAN, Nicola Joanne ACTIVE | Secretary | 06 Feb 2023 | | | | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| BEVAN, James David, Sir ACTIVE | Director | 11 Feb 2025 | | England | July 1959 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| BOWEN REES, Debra ACTIVE | Director | 01 Jan 2020 | | United Kingdom | December 1961 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| CHEROUX, Roch Jean Guy Antoine ACTIVE | Director | 05 Jan 2026 | | Wales | September 1966 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| HANSON, Jane Carolyn, Mrs ACTIVE | Director | 01 Jan 2021 | | United Kingdom | September 1967 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| JAMES, Darren Glyn ACTIVE | Director | 01 Jan 2025 | | United Kingdom | June 1967 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| JEAVONS, Michael John ACTIVE | Director | 11 Jun 2026 | | United Kingdom | March 1969 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| POPE, Darren Scott ACTIVE | Director | 01 Jan 2025 | | United Kingdom | August 1965 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| STAZIKER, David James ACTIVE | Director | 11 Jun 2026 | | Wales | September 1969 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| WILCOX, Alison ACTIVE | Director | 01 Jan 2025 | | England | February 1965 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| WILLIAMS, Nicola RESIGNED | Secretary | 15 Dec 2015 | 06 Feb 2023 | | | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| AYLING, Robert John RESIGNED | Director | 20 Apr 2016 | 08 Jul 2016 | Wales | August 1946 | Dwr Cymru Cyfyngedig, Pentwyn Road, Nelson, Treharris, Mid Glamorgan, CF46 6LY, United Kingdom |
| BRIDGEWATER, Peter Jeremy RESIGNED | Director | 20 Apr 2016 | 20 Apr 2016 | Wales | March 1963 | Dwr Cymru Cyfyngedig, Pentwyn Road, Nelson, Treharris, Mid Glamorgan, CF46 6LY, United Kingdom |
| BRIDGEWATER, Peter Jeremy RESIGNED | Director | 15 Dec 2015 | 31 Dec 2019 | Wales | March 1963 | Dwr Cymru Cyfyngedig, Pentwyn Road, Nelson, Treharris, Mid Glamorgan, CF46 6LY, United Kingdom |
| CRICK, Thomas, Professor RESIGNED | Director | 01 Oct 2017 | 09 Jul 2026 | Wales | January 1981 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| DAVIS, Peter Michael RESIGNED | Director | 01 Jan 2020 | 07 May 2025 | Wales | August 1963 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| EDWARDS, Graham Winston RESIGNED | Director | 20 Apr 2016 | 07 Jul 2023 | Wales | January 1954 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| JONES, Christopher Alun RESIGNED | Director | 15 Dec 2015 | 15 May 2020 | Wales | January 1964 | Dwr Cymru Cyfyngedig, Pentwyn Road, Nelson, Treharris, Mid Glamorgan, CF46 6LY, United Kingdom |
| KENRICK, Joanne Louise RESIGNED | Director | 20 Apr 2016 | 09 Jul 2026 | England | September 1966 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| LYONS, Alastair RESIGNED | Director | 01 May 2016 | 31 Dec 2024 | England | October 1953 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| MOORHOUSE, Barbara Jane RESIGNED | Director | 16 Jan 2023 | 31 Dec 2024 | England | November 1958 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| PALMER, Stephen Royston, Professor RESIGNED | Director | 20 Apr 2016 | 08 Dec 2017 | Wales | July 1951 | Dwr Cymru Cyfyngedig, Pentwyn Road, Nelson, Treharris, Mid Glamorgan, CF46 6LY, United Kingdom |
| PERRY, Peter David RESIGNED | Director | 20 Apr 2016 | 05 Jan 2026 | Wales | June 1962 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| RICHARDS, Menna RESIGNED | Director | 20 Apr 2016 | 03 Jul 2020 | Wales | February 1953 | Dwr Cymru Cyfyngedig, Pentwyn Road, Nelson, Treharris, Mid Glamorgan, CF46 6LY, United Kingdom |
| THOMPSON, Lila Ionie RESIGNED | Director | 06 Sep 2022 | 06 Nov 2025 | England | February 1969 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |
| WALKER, Anna Elizabeth Blackstock RESIGNED | Director | 20 Apr 2016 | 03 Jul 2020 | England | May 1951 | Dwr Cymru Cyfyngedig, Pentwyn Road, Nelson, Treharris, Mid Glamorgan, CF46 6LY, United Kingdom |
| WARREN, John Anthony RESIGNED | Director | 20 Apr 2016 | 02 Jul 2021 | England | June 1953 | Dwr Cymru Welsh Water, Linea, Fortran Road, St. Mellons, Cardiff, CF3 0LT, Wales |