| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 2(6) | inserted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(2) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 6(15) | words substituted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(3) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 8(1) | words substituted | Rheoliadau Materion Gwledig, yr Amgylchedd, Pysgodfeydd a Bwyd (Diwygiadau a Dirymiadau Amrywiol) (Cymru) 2019 | 2019 No. 463 | reg. 30(2) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 9(13) | inserted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(4) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 16 | revoked | The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 39(4) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 23(7) | words substituted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(5)(a) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 23(9)(10) | omitted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(5)(b) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 31(2)(a) | omitted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(6)(a) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 31(2)(b) | words omitted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(6)(b) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 31(3)(b) | omitted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(6)(c) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 31(15) | omitted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(6)(d) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 39(1)(h) | words omitted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(7) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 39A | inserted | Rheoliadau Llifogydd a Dŵr (Diwygio) (Cymru a Lloegr) (Ymadael â’r UE) 2019 | 2019 No. 460 | reg. 7(8) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | Sch. 3 Pt. 1 | words substituted | Rheoliadau Materion Gwledig, yr Amgylchedd, Pysgodfeydd a Bwyd (Diwygiadau a Dirymiadau Amrywiol) (Cymru) 2019 | 2019 No. 463 | reg. 30(3)(a) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | Sch. 3 Pt. 1 | words substituted | Rheoliadau Materion Gwledig, yr Amgylchedd, Pysgodfeydd a Bwyd (Diwygiadau a Dirymiadau Amrywiol) (Cymru) 2019 | 2019 No. 463 | reg. 30(3)(b) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | Sch. 3 Pt. 1 | words substituted | Rheoliadau Materion Gwledig, yr Amgylchedd, Pysgodfeydd a Bwyd (Diwygiadau a Dirymiadau Amrywiol) (Cymru) 2019 | 2019 No. 463 | reg. 30(3)(c) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | Sch. 3 Pt. 1 | words substituted | Rheoliadau Materion Gwledig, yr Amgylchedd, Pysgodfeydd a Bwyd (Diwygiadau a Dirymiadau Amrywiol) (Cymru) 2019 | 2019 No. 463 | reg. 30(3)(d) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | Sch. 3 Pt. 1 | words omitted | Rheoliadau Materion Gwledig, yr Amgylchedd, Pysgodfeydd a Bwyd (Diwygiadau a Dirymiadau Amrywiol) (Cymru) 2019 | 2019 No. 463 | reg. 30(3)(e) | Not yet made to Welsh language versionApplied to English language version | |
| The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | Sch. 5 | revoked | The Water Supply (Water Quality) Regulations 2018 | 2018 No. 647 | reg. 39(3) | Not yet made to Welsh language versionApplied to English language version | |