| Perdez Pas Cyf | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Peter Harding & Co ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Reclaimed Plastic Polymers Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Reindeer Lodge Ltd. | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Roger Jones Hiab & Plant Services | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Russell Francis Haulage Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| SL Recycling Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Stately Albion LTD | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Stormy Farm Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Taylor Plant Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Tegfan Recycling | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Tegfan Recycling | | | Environmental Violation | 2022 | UK-NRW | £0 |
| The Eagles Hotel Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| The Eurogroup / Europest Environmental Services | | | Environmental Violation | 2022 | UK-NRW | £0 |
| The Range | | | Environmental Violation | 2022 | UK-NRW | £0 |
| The Slate Centre Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| The Solutions Factory Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Thomas Waste Management Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Tom Prichard Contracting Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Tom Pritchard Contracting Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Tower Regeneration Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Transcend Packaging Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Trojan-Mek Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| TXO Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Walters U.K. Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Warwick International Group Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Whitehead Chartered Surveyors | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Woodvale Cars Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| WWT Llanelli Wetland Centre | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Aggregates Express Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Aquadrain Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Ayjay Group Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Beard Construction & Landscapes Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Borth and Ynyslas Golf Club Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Bryn Aggregates Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Bryn Recycling Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| C L James Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Caernarfon Commercial Hire Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Caldwell Construction Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Cardigan Metal Recycling Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Celsa Manufacturing (UK) Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Centregreat Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Checkfire Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Croenllwm Cyf | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Deliserve Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Ecosmart (Wales) Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Fiberight Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Fiberight Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Green Steel Works Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Hanson Paving & Development Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| I P Contracting and Plant Hire Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Intelligent Lifecycle Solutions | | | Environmental Violation | 2023 | UK-NRW | £0 |
| J Ellis Williams & Sons (Rhosneigr) Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| John Jones Civil Engineering and Groundworks Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| K and MNO Gibbon and Son | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Knights Brown Construction Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Llanishen Golf Club | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Llanmoor Development CO. Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| M.H.Davies Contractors Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Mansel Davies & Son Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Mark Hunter Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| McCarthy Plant (Bridgend) Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Morgans of Usk Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Parry & Evans Recycling Services Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Pembrokeshire Coast National Park Authority | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Powys Environmental Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Rail Operations Group Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| REDI 205 Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Seer Construction Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Shotton Mill Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| SOS Plant Hire Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Taldrwst Cyf | | | Environmental Violation | 2023 | UK-NRW | £0 |
| The Range Home and Leisure Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Tilhill Forestry Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Tom Prichard Contracting Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| V J Thomas & Son Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Wastesavers | | | Environmental Violation | 2023 | UK-NRW | £0 |
| WBH & CAD Evans and sons | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Williams Plant Hire Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Memory Lanes Cakes Ltd | | | Environmental Violation | 2022 | UK-NRW | £39,300 |
| Dopower Limited | | | Environmental Violation | 2021 | UK-NRW | £17,750 |
| GLJ Recycling Ltd | | | Environmental Violation | 2022 | UK-NRW | £94,294 |
| FCM Commercial Services Limited | | | Environmental Violation | 2023 | UK-NRW | £6,500 |
| DBC Site Services 2005 Ltd | | | Environmental Violation | 2021 | UK-NRW | £75,411 |
| GP Biotec Ltd | | | Environmental Violation | 2018 | UK-NRW | £45,320 |
| Mold Investments Ltd | | | Environmental Violation | 2019 | UK-NRW | £38,653 |
| Bob Gay Plant Hire Ltd | | | Environmental Violation | 2022 | UK-NRW | £12,687 |
| Tower Regeneration Limited | | | water pollution violation | 2021 | UK-NRW | £56,781 |
| Lewis Homes (South Wales) Ltd | | | Environmental Violation | 2020 | UK-NRW | £32,116 |
| Castell Howell Foods | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Pencefn Feeds Ltd | | | Environmental Violation | 2019 | UK-NRW | £40,000 |
| Archimica Chemicals Ltd | | | Environmental Violation | 2013 | UK-NRW | £80,000 |
| Parry & Evans Recycling Services Ltd | | | Environmental Violation | 2017 | UK-NRW | £58,000 |
| BJ Trading | | | Environmental Violation | 2020 | UK-NIEA | £5,500 |
| Blackmore Fuels Ltd | | | Environmental Violation | 2022 | UK-NIEA | £750 |
| BLK BOX Fitness Ltd | | | Environmental Violation | 2023 | UK-NIEA | £5,000 |
| Braidwater Ltd | | | Environmental Violation | 2018 | UK-NIEA | £5,000 |
| Brickkiln Skip Hire Ltd | | | Environmental Violation | 2019 | UK-NIEA | £1,000 |
| Callan Renewables Ltd | | | Environmental Violation | 2022 | UK-NIEA | £2,000 |
| Coleraine Skip Hire & Recycling Ltd | | | Environmental Violation | 2021 | UK-NIEA | £2,000 |
| Daily Fresh Ltd | | | Environmental Violation | 2022 | UK-NIEA | £500 |
