Drainage and Wastewater Management Plans

We’re adopting a new approach to plan for the future of drainage, wastewater and environmental water quality. As part of this, we’re currently developing 11 Drainage and Wastewater Management Plans (DWMPs) across our entire region.

What are DWMPs?

DWMPs are long-term plans – spanning 25 years or more – that will provide an opportunity to improve water quality and drainage systems and will reduce flooding and pollution for the benefit of our customers, communities, businesses, the environment and wildlife. Find out more: What are DWMPs?

Map showing the 11 river basin district catchments across our region

Our DWMPs – the story so far

We’re following an approach developed by Water UK, which provides guidance about DWMPs for all the water companies in the United Kingdom that provide drainage and wastewater services to customers (this is part of a full DWMP framework). Water companies are asked to produce one DWMP for their operating area, alongside plans for strategic planning areas – defined as the major river basin catchments.

Below, you'll find our developing DWMP for each catchment. We’ll publish further information for each one as we work through the process. Please note, any information on these pages should be read in the context of work-in-progress until we publish our final DWMPs in January 2023.

Adur and Ouse catchment

Explore our plans for the Adur and Ouse catchment – and find out how you could help us develop our DWMP.
Find out more

Arun and Western Streams catchment

Explore our plans for the Arun and Western Streams catchment – and find out how you could help us develop our DWMP.
Find out more

Cuckmere and Pevensey Levels catchment

Explore our plans for the Cuckmere and Pevensey Levels catchment – and find out how you could help us develop our DWMP.
Find out more

East Hampshire catchment

Explore our plans for the East Hampshire catchment – and find out how you could help us develop our DWMP.
Find out more

Isle of Wight catchment

Explore our plans for the Isle of Wight catchment – and find out how you could help us develop our DWMP.
Find out more

Medway catchment

Explore our plans for the Medway catchment – and find out how you could help us develop our DWMP.
Find out more

New Forest catchment

Explore our plans for the New Forest catchment – and find out how you could help us develop our DWMP.
Find out more

North Kent catchment

Explore our plans for the North Kent catchment – and find out how you could help us develop our DWMP.
Find out more

Rother catchment

Explore our plans for the Rother catchment – and find out how you could help us develop our DWMP.
Find out more

Stour catchment

Explore our plans for the Stour catchment – and find out how you could help us develop our DWMP.
Find out more

Test and Itchen catchment

Explore our plans for the Test and Itchen catchment – and find out how you could help us develop our DWMP.
Find out more

Our overarching company-wide DWMP

Explore our overarching company-wide plan for our region – and find out how you could help us develop our DWMP.
Find out more
How can you get involved?

If you’re a customer

To shape our plans, we’re using input from customers from previous reports of flooding and pollution, and from our engagement during the development of our business plan for 2020–2025.

If you’re a customer and want to provide information on flooding, pollution and other issues in your area, please get in touch.

 

If you’re a partner organisation

During the production of the DWMPs, we seek to partner with organisations who are involved in drainage and the protection of the environment. So, we’ll share draft information on the website to inform discussions.

If you’d like to collaborate on our plans, please email: DWMP@southernwater.co.uk.

For more ways to get involved, see ‘Who we’ll be working with’ under Developing our DWMPs.

 
 
 
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