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Drainage and Wastewater Management Plan

The Drainage and Wastewater Management Plan, or DWMP, is a long-term, 25-year strategic plan. It sets out how we will maintain, improve, and expand our drainage and wastewater systems, to ensure resilient and robust infrastructure for the North West, now and for years to come.

Planning for a Stronger, Greener and Healthier Future

We’re committed to delivering reliable, wastewater services for the long term. Our DWMP sets out how we’ll help the North West thrive—supporting customers, communities, and the environment now, and in the future.

This plan supports preparations for challenges like climate change, population growth, and urban development. It focuses on protecting the environment from flooding and pollution, with the aim of implementing innovative solutions. The DWMP is built on collaboration with key stakeholders, such as the Environment Agency and local councils, and draws on evidence-based decisions

Over the coming years, the DWMP will shape how we work, informing investment decisions and forming the foundation of our future business plans, including the 2030–2035 investment cycle. The DWMP is now a legal requirement under the Environment Act 2021 and in May 2025 Defra published new guidance to help us develop the next version of the plan.


Our first ever DWMP was published in May 2023

The outputs of the DWMP were a fundamental part of latest business plan submission, helping us secure £350 million investment to deliver green infrastructure solutions over the next 5 years (2025-2030).

This investment will further reduce the risk from sewer flooding and how frequently storm overflow operate. It will enable us to protect and enhance over 500 kilometres of rivers and improve bathing waters and shellfish beds.

To find out more about this and other exciting updates from DWMP, visit our Resource Centre below.

DWMP 2028

We review and update our plan every 5 years. You can read more about what we are up to here.

Resource Centre

Webinars, useful links, overflow maps, latest news and more.

DWMP 2023

We published our first ever DWMP in May 2023. Read more here.

Our Future Plans

Find out more about how we're planning for the future.

WRMP

Our Water Resources Management Plan defines our strategy to achieve a long-term, best-value and sustainable plan for water supplies in the North West.

Collaboration Portal

To make it easier to access DWMP data, we have created the customer portal where you can view risks and opportunities in your area.