| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(a) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 2 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(a) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 2(1) | words added | The Waste Management Licensing Regulations (Northern Ireland) 2003 | 2003 No. 493 | reg. 15(2)(a) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 2(1) | words added | The Waste Management Licensing Regulations (Northern Ireland) 2003 | 2003 No. 493 | reg. 15(2)(b) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 2(1)(c) | word deleted | The Waste Management Regulations (Northern Ireland) 2006 | 2006 No. 280 | reg. 3(2)(a) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 2(1)(e) and word | inserted | The Waste Management Regulations (Northern Ireland) 2006 | 2006 No. 280 | reg. 3(2)(b) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 3 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 3(b) | word inserted | The Waste Management Regulations (Northern Ireland) 2006 | 2006 No. 280 | reg. 3(3)(a) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 3(d) | added | The Waste Management Licensing Regulations (Northern Ireland) 2003 | 2003 No. 493 | reg. 15(3) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 3(d) | deleted | The Waste Management Regulations (Northern Ireland) 2006 | 2006 No. 280 | reg. 3(3)(b) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 4 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 4 | words substituted | The Waste Management Regulations (Northern Ireland) 2006 | 2006 No. 280 | reg. 3(4) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 4A | inserted | The Waste Management Regulations (Northern Ireland) 2006 | 2006 No. 280 | reg. 3(5) | See note |   This amendment not applied to legislation.gov.uk. No historical revised versions have been created for this SR for amendments made prior to its final revocation on 10.08.2009 by SR 2009/254 |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 5 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 6 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 7 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 8 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 9 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 10 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 11 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 12 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 13 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 14 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 15 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 16 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 17 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 18 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 19 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 20 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 21 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 22 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(a) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 23 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 24 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(b) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | Sch. para. 1 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(a) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | Sch. para. 2 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(a) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | Sch. para. 3 | coming into force | The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | reg. 1(a) | Yes | |
| The Groundwater Regulations (Northern Ireland) 1998 | 1998 No. 401 | Regulations | revoked | Groundwater Regulations (Northern Ireland) 2009 | 2009 No. 254 | reg. 31 | Yes | |