Regulatory Library
Library of documents for Hafren Dyfrdwy
A library of our most recent documents as well as the historic Dee Valley Water documents. As Hafren Dyfrdwy was formed in the middle of the five year period, you will find documents here for Dee Valley Water, Severn Trent and Hafren Dyfrdwy.
Regulatory Reporting
Annual Performance Reports (APR)
AMP 7
AMP 6
- Annual performance report 2019/20 - English (PDF)
- Annual Performance Report 2018/19 - English (PDF)
- Original Annual Performance Report 2018/19 - English (PDF)
- Annual Performance Report 2017/18 - English (PDF)
- Annual Performance Report 2016/17 - English (PDF)
- Annual Performance Report 2015/16 - English (PDF)
Regulatory Accounts
Annual Performance Report summaries for our customers
Methodology Statement
Statutory Accounting
Annual Report and Accounts (ARA) for Hafren Dyfrdwy
Content surrounding our latest ARA (2020/21) can be found online.
- Annual Report and Accounts 2020/21 – English (PDF)
- Annual Report and Accounts 2019/20 - English (PDF)
- Annual Report and Accounts 2018/19 - English (PDF)
- Annual Report and Accounts 2017/18 - English (PDF)
- Annual Report and Accounts 2016/17 - English (PDF)
- Annual Report and Accounts 2015/16 - English (PDF)
- Annual Report and Accounts 2014/15 - English (PDF)
- Annual Report and Accounts 2013/14 - English (PDF)
- Annual Report and Accounts 2012/13 - English (PDF)
Event Duration Monitor (EDM) Data 2020
You can find our Event Duration Monitor (EDM) report for 2020 here. This covers the monitors at 47 storm overflow locations.
Each line covers a single storm overflow showing spill frequency, duration of spill and percentage of reporting period the EDM was operational.
Comments have been added to highlight key information regarding the data supplied.
As this is the first year reporting, the period of reporting starts from the 1st April 2020 to align with the updated Natural Resources Wales permits.
Regulatory Compliance and Assurance
Compliance Statement
Risks, Strengths and Weaknesses and Assurance Plan
- Risks Strengths and Weakness and Assurance plan 2020/21 (PDF)
- Statement of risks, strengths and weaknesses and draft assurance plan 2019/20 - English (PDF)
- Statement of risks, strengths and weaknesses and draft assurance plan 2018/19 - English (PDF)
- Statement of risks, strengths and weaknesses and draft assurance plan 2017/18 - English (PDF)
To request a copy of a report in Welsh, please email compliance.assurance@severntrent.co.uk
Assurance Summary
AMP 6
Final Assurance Plan
Licence Conditions
Network Access Code
Scheme of Charges
Statement of Significant Changes (Non Household)
Content surrounding the most recent changes can be found online.
Final Scheme of Charges (Wholesale Non Household)
Final Scheme of Charges (Non Household)
Collected Wholesale Charges
Summary of Charges
Indicative Charges
Board Assurance Statement
- Board assurance statement 2022/23 - English (PDF)
- Board assurance statement 2021/22- English (PDF)
- Board assurance statement 2020/21- English (PDF)
- Board assurance statement 2019/20 - English (PDF)
- Board assurance statement 2018/19 - English (PDF)
- Board assurance statement 2017/18 - English (PDF)
- Board assurance statement 2016/17 - English (PDF)
Final Scheme of Charges (Household)
Statement of Significant Changes (Household)
- Statement of significant changes in our charges 2021/22 - English (PDF)
- Statement of significant changes in our charges 2020/21- English (PDF)
- Statement of significant changes in our charges 2019/20 - English (PDF)
- Statement of significant changes in our charges 2018/19 - English (PDF)
- Statement of significant changes in our charges 2017/18 - English (PDF)
New Connections Charges
- Developer Services Charges - 2021/22 - English (PDF)
- Developer Services Charges - Wrexham - 2020/21 - English (PDF)
- Developer Services Charges - Powys - 2020/21 - English (PDF)
- Developer Services Charges - Wrexham - 2019/20 - English (PDF)
- Developer Services Charges - Powys - 2019/20 - English (PDF)
- Developer Services Charges - Wrexham - 2018/19 - English (PDF)
- Developer Services Charges - Powys - 2018/19 - English (PDF)
- Developer Services Charges - 2017/18 - English (PDF)
Other significant documents
Company structure
Content surrounding the group structure can be found online.
Draft Water Resource Management Plan (WRMP)
Customer behaviour
Action Plan for freeze/thaw incident 2018
Welsh language scheme
PR14 reconciliation documents
PR14 reconciliation documents
Consultation Responses
Consultation responses
- PR14 Review - call for input - Severn Trent and Hafren Dyfrdwy response
- Changing the Water UK metrics in D-Mex - Hafren Dyfrdwy response
- Consultation on regulatory reporting for the 2020-2021 reporting year - Severn Trent and Hafren Dyfrdwy response
- Request for Stakeholder views on charging for developer services in Wales - Hafren Dyfrdwy response
- CCW Strategy - 2021-2024 consultation - Severn Trent and Hafren Dyfrdwy response
- Welsh Government electric vehicle charging strategy - Hafren Dyfrdwy response
- Consultation on connections charging rules for Welsh companies - Hafren Dyfrdwy Response
- Consultation on regulatory reporting for the 2021-22 reporting year - Severn Trent and Hafren Dyfrdwy response