Drainage and Wastewater Management Plan (DWMP)
DWMPs are long-term strategic plans that set out how we’ll manage, maintain, and improve our drainage and wastewater systems.
Our pipes and sewers take wastewater away from your properties and we treat it, before returning it safely back into local rivers and waterways. A changing climate, extreme weather and an increasing population are making this more difficult.
Our DWMP will explain how we plan to operate and adapt our assets to meet these current and future challenges. It gives us the means to look ahead and protect our customers, communities, and the environment for decades to come.
Watch our video, featuring Tessa Fayers and Steve Spencer, to hear more about what the DWMP is and why it’s vital for a resilient future.
DWMP28
DWMPs are 25-year strategic plans produced every five years. In collaboration with stakeholders, including local authorities, catchment partnerships and environmental organisations, in 2023, we published our non-statutory DWMP (DWMP23). Since then, the government has made it a legal duty for all water companies to produce and maintain a DWMP. We’re now developing our first statutory shared plan, DWMP28.
From 2028, some stages will be reviewed annually to keep the plan flexible and adaptable. Our draft plan will be available for public consultation in November 2027, with our final plan published in August 2028.
Developing DWMP28
Working together
Our DWMP28 documents
Our DWMP28 portals
Our wastewater service
We provide a wastewater service across London and the wider Thames Valley region. Our DWMP helps to make sure this service is reliable and sustainable. We:
- Collect watewater every day for16 millioncustomers
- Treat wastewater4.7 billionlitres
- Maintain and enhancec.110,000km of sewer
Our DWMP aims
We're committed to getting our wastewater service right. Here’s what that means for you.
Future protection
We’re planning for tomorrow, so future generations can grow up with cleaner, healthier rivers, thriving wildlife, and communities free from flooding. By investing now, we’re building a legacy for the future.
Investing wisely
We’re making essential improvements to deliver better services and long-term value for our customers. Our focus is on keeping costs fair while providing real benefits from these investments.
Financial support is available if you need help with payments.
Peace of mind
We’re reinvesting your money where it matters most, protecting homes, families, and local communities from flooding and pollution. Every investment helps create safer streets, cleaner rivers, and a future where the next generation can thrive.
More green spaces
We’re working with partners to create more green areas for you to enjoy. Urban greenery doesn't just look good, it can cool streets by up to 4°C on hot days and boost wellbeing too.
How you can help
Looking after our drains is easier than you think. A few small changes at home can make a big difference to the environment.
Find out what you can do to protect our drainage and wastewater services.
DWMP23
Access published documents and portals from our 2023 non-statutory DWMP.