| Adgefore Limited | | | Environmental Violation | 2017 | UK-NRW | £34,405 |
| Banana Logistics Ltd | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Cardiff & Vale University Health Board | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Display Recycling Limited | | | Environmental Violation | 2017 | UK-NRW | £0 |
| E J Metals Recycling Limited | | | Environmental Violation | 2017 | UK-NRW | £4,000 |
| Euro-Worldwide Trading Limited | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Hydropol Project & Management a.s. | | | Environmental Violation | 2017 | UK-NRW | £26,860 |
| Mountain Trailers Limited | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Mountain View Ranch Ltd | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Parc yr Abbot Farm Ltd | | | Environmental Violation | 2017 | UK-NRW | £8,125 |
| Queensferry Car Breakers Limited, c/o Mechan Accountants | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Siteserv Recycling (SW) Limited | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Siteserv Recycling (SW) Ltd | | | Environmental Violation | 2017 | UK-NRW | £5,040 |
| SL Recycling Ltd | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Sunmagic Juices Ltd | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Ynysmeudwy AFC | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Zest Recruitment Staffing Solutions Ltd | | | Environmental Violation | 2017 | UK-NRW | £0 |
| Canal River Trust | | | Environmental Violation | 2018 | UK-NRW | £0 |
| CB & PSM Davies | | | Environmental Violation | 2018 | UK-NRW | £0 |
| City Skips (NW) Limited | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Clywd Breakers Limited | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Halo Foods Limited | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Hydro Schemes UK Limited | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Knolton Farmhouse Cheese Limited | | | Environmental Violation | 2018 | UK-NRW | £1,403 |
| Langdon Mill Farms Ltd | | | Environmental Violation | 2018 | UK-NRW | £11,825 |
| Pilkington Asbestos Removal Services Ltd | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Queensferry Car Breakers Limited, c/o Mechan Accountants | | | Environmental Violation | 2018 | UK-NRW | £0 |
| RR Davies Ltd | | | Environmental Violation | 2018 | UK-NRW | £0 |
| South Wales Wood Recycling Limited | | | Environmental Violation | 2018 | UK-NRW | £0 |
| TJ's Skip Hire Ltd | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Abingdon Flooring Limited | | | Environmental Violation | 2019 | UK-NRW | £43,957 |
| City Skips (NW) Limited | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Clwyd Spares and Repairs Ltd | | | Environmental Violation | 2019 | UK-NRW | £5,300 |
| ComBigaS Denmark | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Gethin Davies & Son | | | Environmental Violation | 2019 | UK-NRW | £0 |
| J M & L R Reynolds | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Leekes Limited | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Maes Elwy Hydro Limited | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Mason & Reynolds Holdings Ltd | | | Environmental Violation | 2019 | UK-NRW | £0 |
| NAG Recycling Ltd | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Rees Metals | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Stonewest Construction Limited | | | Environmental Violation | 2019 | UK-NRW | £0 |
| World Care (Wales) Limited | | | Environmental Violation | 2019 | UK-NRW | £0 |
| Alun Griffiths (Contractors) Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Matthew Jeavons MJ Rubbish Removals Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Endurmeta Ltd | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Cwrt Malle Ltd | | | Environmental Violation | 2017 | UK-NRW | £44,500 |
| Trade Effluent Services Limited | | | Environmental Violation | 2017 | UK-NRW | £83,900 |
| South Wales Wood Recycling Limited | | | Environmental Violation | 2018 | UK-NRW | £25,450 |
| D J Huxley (Farms) Ltd | | | Environmental Violation | 2018 | UK-NRW | £12,670 |
| Tongfang Global (UK) Co Limited | | | hazardous waste violation | 2018 | UK-NRW | £160,760 |
| Label Needs LTD | | | Environmental Violation | 2017 | UK-NRW | £200 |
| DB & RM Edwards & Sons | | | Environmental Violation | 2018 | UK-NRW | £0 |
| Mainline Pipelines Limited | | | Environmental Violation | 2018 | UK-NRW | £0 |
| W T Banks & co (Farming) Limited | | | Environmental Violation | 2018 | UK-NRW | £7,000 |
| Afon Las Hydro Limited | | | Environmental Violation | 2017 | UK-NRW | £18,860 |
| Crofty Point Metals Limited | | | Environmental Violation | 2017 | UK-NRW | £7,000 |
| Langdon Mill Farms Ltd | | | Environmental Violation | 2017 | UK-NRW | £3,421 |
| Treforris fawr farm (Mr Phillip Davies) | | | Environmental Violation | 2017 | UK-NRW | £5,666 |
| World Care (Wales) Limited | | | Environmental Violation | 2017 | UK-NRW | £0 |
| DJ & OM Marks & son | | | Environmental Violation | 2020 | UK-NRW | £12,327 |
| Cuddy Demolition and Dismantling Limited Retirement Benefit Scheme | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Sundorne Products (Llanidloes) Ltd | | | Environmental Violation | 2019 | UK-NRW | £55,400 |
| Siteserv Recycling (SW) Ltd | | | Environmental Violation | 2019 | UK-NRW | £43,122 |
| Ammanford Recycling Limited | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Powys Environmental Ltd | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Tower Regeneration Limited | | | Environmental Violation | 2021 | UK-NRW | £20,850 |
| Derwen Llyn Construction Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Prichards Remediation Ltd | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Withey Developments Limited | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Trehaven Leisure Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| ByProduct Recovery Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| D S Rubbish Removals Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Rockwool Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Peter Davies Agricon Limited | | | Environmental Violation | 2021 | UK-NRW | £0 |
| St David's Leisure LTD | | | Environmental Violation | 2021 | UK-NRW | £0 |
| V J Thomas & Sons Partnership | | | Environmental Violation | 2021 | UK-NRW | £5,947 |
| Gill Waste Recycling Limited | | | Environmental Violation | 2022 | UK-NRW | £12,586 |
| South West Wood Products Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Trehaven Leisure Limited | | | Environmental Violation | 2022 | UK-NRW | £0 |
| Ammanford Recycling Limited | | | Environmental Violation | 2023 | UK-NRW | £0 |
| Lewis Homes (South Wales) Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Befesa Salt Slags Limited | | | Environmental Violation | 2021 | UK-NRW | £0 |
| Eaden Homes Ltd | | | Environmental Violation | 2020 | UK-NRW | £2,250 |
| Grays Waste Management Limited | | | Environmental Violation | 2020 | UK-NRW | £2,875 |
| Ammanford Recycling Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Asbestos North West & Wales | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Caernarvonshire Crown Slate Quarries Company Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Celtic Heritage Construction and Stonemasonary Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Fountains Forestry Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| LT's Tyres and Autos Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Par Contractors Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Pembrokeshire Holdings Limited | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Pontnewydd Golf Course | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Project Yellow Recycling Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Seda UK Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Thermalguard Consulting Ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Treborth Leisure ltd | | | Environmental Violation | 2020 | UK-NRW | £0 |
| Williams Brothers | | | Environmental Violation | 2020 | UK-NRW | £0 |
| AQA (Cardiff) Ltd. | | | Environmental Violation | 2021 | UK-NRW | £0 |
| BDC Aggregates | | | Environmental Violation | 2021 | UK-NRW | £0 |
