| 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 |
| 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 |
| 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 |
| Castell Howell Foods | | | Environmental Violation | 2022 | UK-NRW | £0 |
| FRANK MERCER & SONS LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| NEW RUYEE LTD | | | environmental violation | 2023 | UK-EA | £0 |
| BIDENVO LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| ORCHARD GREEN HOLDINGS LTD | | | environmental violation | 2023 | UK-EA | £0 |
| ORCHARD GREEN LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| SHRED AND RECYCLE LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| WESTMIDS ENVIRONMENTAL SERVICES LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| CHP POLYMERS LTD | | | environmental violation | 2023 | UK-EA | £0 |
| OSO FIBER UK LTD | | | environmental violation | 2023 | UK-EA | £0 |
| OSO FIBER UK LTD | | | environmental violation | 2023 | UK-EA | £0 |
| NATIONAL CSS | | | environmental violation | 2023 | UK-EA | £0 |
| COLSON TRANSPORT LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| MIDWEST POLYCHEM LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| HARMSTON WASTE MANAGEMENT LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| KEITHS RUBBISH CLEARANCE | | | environmental violation | 2023 | UK-EA | £0 |
| MAYBROOK DEVELOPMENTS (APPLEY BRIDGE) LTD | | | environmental violation | 2023 | UK-EA | £0 |
| FIRST CHOICE GLOBAL TRADE LTD | | | environmental violation | 2023 | UK-EA | £0 |
| TERRA ECOTECH LTD | | | environmental violation | 2023 | UK-EA | £0 |
| AVANTI ENVIRONMENTAL GROUP LTD | Tradebe | waste management and environmental services | environmental violation | 2023 | UK-EA | £0 |
| AYSTAR INTERSTATE TRADE | | | environmental violation | 2023 | UK-EA | £0 |
| CANUSA HERSHMAN UK LTD | | | environmental violation | 2023 | UK-EA | £0 |
| SAM MAGNET UK LTD | | | environmental violation | 2023 | UK-EA | £0 |
| SHROPSHIRE BIOMASS FUEL LTD | | | environmental violation | 2023 | UK-EA | £0 |
| NEW WEST GYPSUM RECYCLING (UK) LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| MICK DENTON METAL RECYCLING & SKIP HIRE LIMITED | | | environmental violation | 2023 | UK-EA | £0 |
| POP UP UNITS LTD | | | environmental violation | 2023 | UK-EA | £0 |
