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Drainage and wastewater management plan

Drainage and Wastewater Management Plans (DWMPs) are new long-term plans that will make sure we have a resilient and sustainable wastewater service for the next 25 years, and beyond.

A group of volunteers wearing high visibility jackets working at the edge of a river .

The DWMP sets out how wastewater systems, and the drainage networks that serve them, are to be extended, improved and maintained to ensure they are resilient against future pressures such as climate change and population growth.

Our final DWMP will be published in March 2023. A consultation on our draft Plan opens for your feedback from Thursday 30 June until Thursday 22 September.

Our DWMP aims

The DWMP identifies the wastewater catchments most at risk due to future pressures across our region. For those catchments, we deliver a costed investment plan to tackle the key challenges.

Our DWMP aims to

  • Protect our environment
  • Look after the health of our rivers
  • Limit the risks of flooding
  • Generate wider benefits for the communities we serve

Our wastewater region

A map showing the wastewater area covered by Thames Water.

Our draft DWMP documents

We’ve produced our DWMP documentation in alignment with the industry framework document.

A view over London with the River Thames and Tower Bridge in the foreground.

Our plans for London

Learn more about our plans in the Catchment Strategic Plan section

View our plans
A row of stone cottages with a river and a small stone bridge in the foreground.

Our plans for outside London

Learn more about our plans in the Catchment Strategic Plan section

View our plans

Catchment strategic plans

Have your say

It’s the first time a long-term plan for wastewater and drainage has been co-created with other organisations, and we’re going to continue to consult and refine it with our customers and stakeholders before it’s finalised.

The consultation period for our draft Plan is open for your feedback until Thursday 22nd September.

Your views count so please submit a response now to help shape our final DWMP, which will be published in March 2023.

Have your say

If you would prefer to complete the consultation in a Word format, please use this template and email it back to us.

You can learn more about the DWMP on our portal.

How we created our plan together

Over the last three years, we’ve led the development of the London and the Thames Valley region plan, and it’s been a truly collaborative and partnership-led process. Our partners have included the Environment Agency, local authorities and environmental action groups.

We worked through the five stages of the DWMP framework

A group of people sitting at a table having a working meeting with laptops open in front of a window.

You can find further details and data from each of these five stages on our Practitioner portal. Our glossary has a helpful description of the layers of data in the practitioners portal.

Learn more about what our portal offers in our quick video overview. Please email us to request access.

Next steps

Following consultation, we will respond to responses and finalise the plan using the feedback to guide us.

We’ll then publish our final DWMP in March 2023. This will support the development of our PR24 business plan for 2025 to 2030.

An illustration showing different aspects of the Drainage and Wastewater Management Plan.