| BDC Aggregates | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Berwyn Hydro Limited | | | Environmental Violation | 2021 | UK-NRW | £0 |
| D R & E G Davies Ltd | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Lance Williams Roofing ltd | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Morgan Evans and Company Ltd | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Refrigeration Norwest | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Tower Regeneration Limited | | | Environmental Violation | 2021 | UK-NRW | £0 |
| W J Owen & Sons Ltd | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Walters U.K. Limited | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Cheshire & North Wales Sand & Gravel Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Dysynni Developments LTD | | | Environmental Violation | 2022 | UK-NRW | £0 |
| eCube Solutions limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Future Valleys Consortium | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Greens Recycling (Wales) Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| JDM Contractors Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Marquette Metal Recycling Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Merthyr (South Wales) Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| RDR Woodchip Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Royal St. David's Golf Club Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| SGG Developments Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Teifi Trout Association | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Tu Mewn Cyfyngedig | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Welsh Tyre Recycling Services Limited | | | Environmental Violation | 2022 | 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 |
| A & D Evans & Sons | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Abertawe Metals Recycling Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| ACD Skips Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| AJ & CJ Powell & Son | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Alun Griffiths (Contractors) Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Anglesey Turf Company Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Apple County Cider Co Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Arch Services (UK) Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| B E Baker & Sons Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| BDC Aggregates | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Befesa Salt Slags Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| BG Carey & Sons | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Bob Gay Plant Hire Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Breedon Group plc | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Browns Recycling Group Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Bryn Aggregates Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Bryngwyn Hall | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Carmarthen Bay Holiday park | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Castle Dairies Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Celtic Energy Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Celtic Recovery Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Clive Hurt (Plant Hire) Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| CS Grabhire and Groundworks | | | Environmental Violation | 2020 | UK-NRW | £0 |
| D & E Haulage | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Dai Warlow Agri Contractors | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Delta Property Cardiff Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Dragon LNG Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| DW Cummings Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| E Jenkins & Son | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Easiview Video Services Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Ekocycle Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Enovert North Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Environmental Focus Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Euroforest Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| FIM Services LTD | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Fron Goch Garden Centre | | | Environmental Violation | 2020 | UK-NRW | £0 |
| G D Harries & Sons Ltd. | | | Environmental Violation | 2020 | UK-NRW | £0 |
| G Whittingham & Sons | | | Environmental Violation | 2020 | UK-NRW | £0 |
| GKR Maintenance & Building Co Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Glynneath Golf Club | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Gower Recycling Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Green Skips Environmental Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Gwent Holdings Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Harris Salvage | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Hogan (Construction) Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Hook2sisters Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Howells Fuel oil | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Hydropol Project & Management a.s | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Hydropol Project & Management a.s | | | Environmental Violation | 2020 | UK-NRW | £0 |
| I Wood Renewables Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Ian Williams Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Innogy Renewables UK Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| J.G. Hale Construction Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| JA Insulation Services | | | Environmental Violation | 2020 | UK-NRW | £0 |
| JM Envirofuels Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Jones Bros Ruthin (Civil Engineering) Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Kevin Cahill Transport | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Kiely Bros Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| LAM Smith and Sons Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Lewis Drainage Ltd (Robert Lewis) | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Lewis Homes (South Wales) Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Lodge Farm Biogas Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| M Jones Road Haulage Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| M&J Plant & Transport Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Maes Bach Holdings Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Metal Innovations UK | | | Environmental Violation | 2020 | UK-NRW | £0 |
| MJ Rubbish Removals Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Monger Caravan and Resorts Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Morris & Co (Handlers) Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Morrison Utility Services Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Mynachdy Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| NAT Group Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Norton’s Plant Hire | | | Environmental Violation | 2020 | UK-NRW | £0 |
| P&M Waste | | | Environmental Violation | 2020 | UK-NRW | £0 |
