Our Statutory Consultation is open
Teddington Direct River Abstraction (TDRA)
We’re holding a statutory consultation on our vital drought resilience project for London. During times of prolonged dry weather, the TDRA project would provide up to 75 million extra litres of water per day, supplying residents, businesses, schools, hospitals and other essential services.
Find out how we'll be delivering this project, with key activities – including building tunnels, new structures and shafts – at Mogden Sewage Treatment Works, Ham Playing Fields and near Teddington Weir.
Our statutory consultation runs from 17 June 2025 to 26 August 2025, and we invite you to have your say on our proposals.
We're seeking your feedback on:
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Project design, operation and maintenance
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Indicative construction activities and schedule
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Potential effects on communities and the environment
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Managing potential environmental effects
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Land needed for the project and how it would be used
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Draft overarching Design Principles
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Opportunities to enhance local spaces
Please read our consultation materials and give us your feedback so you can help us shape our proposals to keep water flowing for the future.
During droughts, we’d take water from the River Thames using a new intake located upstream of Teddington Weir. We’d then transfer the river water via a new underground tunnel to our existing Thames Lee Tunnel (TLT), which connects to our Lee Valley reservoirs. From here, we would treat it further to become drinking water for customers across Greater London.
To keep river levels balanced, we’d replace the water we’ve taken at Teddington with the same amount of recycled water from our proposed new Tertiary Treatment Plant (TTP) at our Mogden Sewage Treatment Works. This extra treatment step would improve the quality of the water that would be discharged, helping us maintain river levels and protect the environment.
We’ve produced a range of consultation materials to help you find out more, including documents, videos and maps. In our document library, our Statutory Consultation Brochure provides an overview of the project, and we’ve also produced a Consultation Materials Fact Sheet which sets out what consultation materials there are.
You can also view printed copies of consultation documents at public information events, and at selected venues in your local community, such as libraries and community centres. These deposit locations and information points are also listed in our document library.
Please send us your feedback by 11.59pm Tuesday 26 August 2025, using any of these methods:
- Fill in our online Feedback Form
- Email our dedicated consultation response email: TDRA@ipsos.com
- Write to us free of charge at: FREEPOST TDRA CONSULTATION
- Fill in a printed feedback form and post it to us or hand it in at one of our public information events. You can also request printed forms from us or pick one up from one of our information events, deposit locations or information points in the community.
Please only send us consultation responses via these methods because we can’t guarantee we’ll accept responses sent using other methods.
Discover more about how our vital drought resilience project for London would work.
We've organised eight in-person information events where you can meet with project experts and review the consultation materials. For those who can't attend the in-person sessions, we're also offering two virtual events. Click here to find out more.
You can open the full document library and view or download any of the documents published for statutory consultation here. Click here to find out more.
Find out more about how we’d build the project
The Preliminary Environmental Information Report (PEIR) shows our initial assessment of the project’s likely significant environmental effects. The PEIR Non-Technical Summary (NTS) document summarises this information.
We’ve also created a digital version of the PEIR NTS, which guides you through the chapters showing relevant information on various maps.
Using our Interactive Map, you can decide what information the map shows about the project. In addition, each map layer offers topic-specific suggestions as to which consultation materials will help you understand the project better.
You can contact us for more information or printed materials by emailing info.TDRA@thameswater.co.uk. Alternatively, you can leave a message with any queries about our statutory consultation on our dedicated phone line on 0800 124 4877. If you’d like printed copies of the statutory consultation brochure and feedback form, please let us know and we’ll post free of charge (one per household). You can also contact us if you’d like information in alternative formats such as translations, large print or Braille.
You may also request a complete set of printed statutory consultation documents, including the PEIR, but we reserve the right to charge up to £200 (inc P&P) per printed set. All consultation documents are available free of charge online with printed copies available to view in the community throughout the statutory consultation period at our deposit locations.