Industrial / Commercial
- Able (UK) Ltd
- Air Products plc
- Anderson Barrowcliff LLP
- Artenius UK Ltd
- Augean PLC
- BP Exploration Operating Co Ltd
- British Waterways
- Cleveland Potash Ltd
- ConocoPhilips Ltd
- Corus plc
- Croda
- Dow Chemical Company Ltd
- Exwold
- Fine Organics Limited
- GrowHow UK Ltd
- Huntsman Pigments
- Huntsman Polyurethanes
- INEOS Chlor
- INEOS Nitriles (UK) Ltd
- Johnson Matthey
- Koppers (UK) Ltd
- LOTTE Chemical UK Ltd
- Lucite International UK Ltd
- North East Process Industry Cluster (NEPIC)
- Northumbrian Water plc
- nPower Cogen
- PD Teesport Ltd
- Petroplus
- px limited
- SABIC UK Petrochemicals
- SembCorp Utilities UK Ltd
- Simon Storage Ltd
- SITA Tees Valley Ltd
- Tees Bay Pilots Ltd
- Teesside Power Limited
- Univar Ltd
- Vertellus Specialities UK Ltd
- Vopak
Nature Conservation Agencies
- Nature’s World
- Royal Society for the Protection of Birds (RSPB)
- Tees Valley Wildlife Trust
- Teesmouth Bird Club
- Teesmouth Field Centre
- Teesside Environmental Trust
- Wildfowl & Wetlands Trust
Statutory Authorities
- Environment Agency
- Hartlepool Borough Council
- Middlesbrough Borough Council
- Natural England
- Redcar & Cleveland Borough Council
- Stockton-on-Tees Borough Council
Membership as of 8th July 2010