| Ammanford Recycling Limited | | | environmental violation | 2024 | UK-NRW | £48,652 |
| Erwin Rhodes Ltd | | | environmental violation | 2024 | UK-EA | £10,973 |
| Bycott Farms Ltd | | | environmental violation | 2024 | UK-EA | £6,255 |
| ASNEW AUTO RECYCLERS LTD | | | environmental violation | 2024 | UK-EA | £0 |
| B & J PARR | | | environmental violation | 2024 | UK-EA | £0 |
| BRINKLOW QUARRY LTD | | | environmental violation | 2024 | UK-EA | £0 |
| I R NEW PLASTIKEX LTD | | | environmental violation | 2024 | UK-EA | £0 |
| INFINITE RESOURCES DMCC | | | environmental violation | 2024 | UK-EA | £0 |
| MF BENNION (POTATOES) LTD | | | environmental violation | 2024 | UK-EA | £0 |
| P R BIBBY & SONS (SCRAP MERCHANTS) LTD | | | environmental violation | 2024 | UK-EA | £0 |
| PINEWOOD STUDIOS | | | environmental violation | 2024 | UK-EA | £0 |
| RECYCLE FOR GREEN LTD | | | environmental violation | 2024 | UK-EA | £0 |
| THAMES WATER UTILITIES LIMITED | Thames Water Utilities Ltd. | utilities and power generation | environmental violation | 2024 | UK-EA | £0 |
| WHITEHEADS WASTE MANAGEMENT LTD | | | environmental violation | 2024 | UK-EA | £0 |
| Northumbrian Water | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2024 | UK-EA | £50,000 |
| Southern Water | Macquarie | financial services | water pollution violation | 2024 | UK-EA | £348,945 |
| J & G Environmental Ltd | | | water pollution violation | 2024 | UK-EA | £68,500 |
| Severn Trent Water | Severn Trent PLC | utilities and power generation | water pollution violation | 2024 | UK-EA | £2,088,657 |
| F.A.W. Bakers Kingston Farm Ltd | | | environmental violation | 2024 | UK-EA | £19,220 |
| Roydon Resource Recovery Ltd | | | hazardous waste violation | 2024 | UK-EA | £870,000 |
| J.M. HAULAGE (LEEDS) LIMITED | | | environmental violation | 2024 | UK-EA | £0 |
| VWJ Earth Moving Limited | | | solid waste violation | 2024 | UK-EA | £19,000 |
| Jumbo Waste and Metal Limited | | | solid waste violation | 2024 | UK-EA | £1 |
| TW Frizell (Haulage & Plant Hire) Ltd | | | solid waste violation | 2024 | UK-EA | £1 |
| RJC Regeneration Limited | | | solid waste violation | 2024 | UK-EA | £8,000 |
| Resources Management UK Ltd | | | solid waste violation | 2024 | UK-NRW | £0 |
| Edenstone Homes Limited | | | water pollution violation | 2024 | UK-NRW | £54,762 |
| Your Space Projects Limited | | | habitat violation | 2024 | UK-NRW | £2,605 |
| Ipsum Drainage (Scotland) Limited | | | environmental violation | 2024 | UK-SEPA | £0 |
| Ammanford Recycling Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Ammanford Recycling Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Enzos Homes Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| New Horizons Biofuel and Animal Beddings Co Ltd | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Ty Mawr West Limited | | | Environmental Violation | 2023 | 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 |
| BAE Systems Global Combat Munitions Limited | BAE Systems | aerospace and military contracting | 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 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| Dwr Cymru Cyfyngedig | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | 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 |
| National Grid | National Grid | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| National Grid Electricity Distribution Plc | National Grid | utilities and power generation | Environmental Violation | 2023 | UK-NRW | £0 |
| National Grid Electricity Distribution Plc | National Grid | utilities and power generation | 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 |
| Rexel UK Ltd | Rexel | wholesalers | 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 |
