Have your say on South West Water’s first ever Drainage and Wastewater Management Plan

We’re pleased to share our draft first Drainage and Wastewater Management Plan – or DWMP – have a look via the links below.

DWMPs are long term plans that outline how we plan to approach and manage sewerage and wastewater in our region over the next 25 years.

Our aim is to set out how we will evolve our water recycling system into one that future generations can be proud of and will:

  1. Protect people, homes and businesses from flooding
  2. Support tourism and the long-term economic health of the region
  3. Increase the use of nature-based solutions, innovating to protect our unique environment and reducing our carbon footprint
  4. Eradicate pollutions and the damage caused by plastics, fats and wet-wipes for the long-term benefit of all.


In publishing this document, we want to continue our conversation about the issues that matter to you and we are especially keen to hear your views on the following:

  1. How do we get the right balance of nature-based solutions and partnership working?
  2. Have we got the right balance between prioritisation and pace of change?
  3. How can we better protect our networks from external factors such as 'unflushables'?



What is a DWMP?

Our DWMPs are long term plans that outline how we plan to approach and manage sewerage and wastewater over the next 25 years. They provide us with the opportunity to understand the impact on our network of things such as:

tick.png Population growth - new housing developments and increased occupancy of exisiting homes
tick.png Climate change - more volatile weather, severe rainfall events, longer dry periods
tick.png Urban creep - paving over of urban areas such as parks and gardens, removing natural soakways for rainwater surface run off


We know that how we respond to these issues will have a huge impact on our region and communities. The decisions we make will impact on our customers and the environment that we live and work in for many years, so it’s important we get those decisions right.



Our Plan to 2050

Our consultation on our emerging DWMP is open until 22 September 2022, should you wish to provide feedback you can do so here.

We will be exploring these themes further with our Customer Panel and a new Stakeholder Forum over the coming months. We will take your feedback and use it to inform our final plan which will be published in March 2023.

Our plans have been developed in line with the industry framework.

You can read our our plan below, as well as our customer and technical summaries.

Our Regional Plan Customer summary Technical Summary

Strategic catchments

Each wastewater treatment works in our region has an area that it serves – we like to call these catchments. Currently, we have c. 653 of these! To enable us to focus our planning we have split these into 22 larger catchments – this means we can manage our region as an entire system rather than looking at smaller challenges isolated to individual treatment works.

You can find out more about our plans for each of these areas using the map opposite.