Drainage and Wastewater Management Plans (DWMP) are a new initiative. They require sewerage companies to set out 25 year long-terms plans (2025-2050) on how they intend to extend, improve, and maintain robust and resilient drainage and wastewater systems against future pressured such as climate change, population growth and urbanisation.

In June 2022, we published our draft DWMP ahead of a three month consultation which closed at the end of September 2022. Since then we have been updating and refining our final DWMP to take on-board consultation feedback and comments. A key part of this is to ensure our final DWMP provides robust evidence to support and inform our PR24 business plan, covering the period from 2025-30, to ensure short term investment needs align with the longer-term needs of our catchments out to 2050 and beyond. 

Below are a series of documents aligned to the requirements set out in the framework. 

The hierarchy of documents is summarised in the diagram: 

• Customer quick guide – this short guide explains the aims of the DWMP and our long-term objectives. It provides an easy-to-read summary of what we are proposing to deliver in the short, medium and long term.
• Non-technical overview (Level 1 plan) – this document, is aimed at regulators, planners, other drainage or infrastructure providers or informed customers who wish to get an overview of the approach that we have followed and understand the findings. It also sign posts to appendices and a series of technical summaries which then provide fuller details into each aspects of the process and how we have developed our best value plan.
• Strategic Planning Area Overview Level 2 – across the Hafren Dyfrdwy region we have 50 wastewater treatment works (WwTW), and so based on the location of the catchment we have collated catchments into strategic planning areas. We have 2 strategic planning areas (SPA) which are aligned to river basin management areas. These documents complement the Level 1 Non-Technical Report by providing more detail of how our DWMP best value plan relates to different areas.
  
• Tactical Planning Unit Summary (Level 3)  – for each SPA area, we have provided further detail on each of the 50 WwTW catchment, grouped into their SPA.
  
• Appendices - to accompany our final DWMP we have produced 11 documents to provide more detail: These comprise of:

1. List of Technical Summaries
2. Planning Objectives
3. Evolution of Drainage Planning
4. Customer Engagement
5. Statement of Response
6. Strategic Environmental Assessment
7. Indicative Habitats Regulation Assessment

• Technical Summaries - undertaken our DWMP. These are signposted from the Level 1 non-technical overview. These comprise of a series of more technically focused documents which provide more insight into how we have.
• Supporting documents - these show the outputs of our 2019 Risk Based Catchment Screening (RBCS) and 2020 Baseline Risk and Vulnerability Assessments (BRAVA). We have also provided a ‘Glossary of Terms’ to explain some of the terminology and acronyms we have used within our DWMP. Finally, to make it easier for organisations to identify which WwTW drain their areas, we have also published a spreadsheet to help identify areas of interest.
• Board Assurance Statement - this document provides assurance that our Board has signed off our final DWMP.

To help you understand the region we serve and the boundaries of our wastewater catchments, the map below will help you to navigate the different reporting levels which we have documented. If you click on a catchment the pop-up window will provide a link to the appropriate Level 2 Strategic Planning Area and Level 3 Tactical Planning Units documents. In addition to being able to zoom in/out there is also the functionality to enter a postcode to quickly find which catchment a property is served by (we recommend you open the web map in a new window using the link beneath).

Open this map in a new window