Our annual reporting
Here you can access both current and previous reports about our financial and non-financial performance.
What we report on
Transparency about our performance is paramount for our stakeholders, customers, and regulators. We must report our performance regularly and accurately.
Our financial and non-financial reporting details the performance of our regulated business, as defined under our Licence as a water and wastewater company. You can also find information on what steps we're taking to improve our reporting processes.
Our Annual Performance Report
This report covers our performance over the past year, both in financial terms and against our outcome and performance commitments.
Assurance information
As part of our annual reporting, we also take the time to identify strengths and weaknesses in our information. Our assurance plan then sets out how we intend to ensure our reporting is transparent and accurate.
Interim Financial Report
This report details our interim financial performance and statements.
Bioresources
If you're looking for opportunities within the bioresources market, here you can find more information about the latest market activity.
Our environmental performance
We're also committed to being transparent about how we report our environmental performance. This includes water quality reports for our designated bathing waters, our reporting of pollution incidents, and more.
It also covers our carbon emissions reporting and what we're doing to reach net zero by 2050.
You can follow the link below to read or download these reports and find out more about our plans for protecting the environment.
Report archive
Filter by year:
2023-24
Interim Financial Information and Report
2022 - 23
Bioresources Market Activity
2022 - 23
Annual Report of Southern Water by the Independent Climate and Environment Group 2022–23
2022 - 23
Appendix – APR Supporting Commentary 2022–23
2022 - 23
Srn 2022 23 Bioresources Market Information
2022 - 23
Interim Financial Information and Report 2022
2022 - 23
Annual Performance Report Methodology 2022–23
2022 - 23
Data Assurance Summary 2022–23
2022 - 23
Reporting Criteria 2022–23
2022 - 23
Annual Performance Report
2021 - 22
Srn 2021 22 Bioresources Market Activity
2021 - 22
Appendix – APR Supporting Commentary 2021–22
2021 - 22
Srn 2021 22 Bioresources Market Information 1
2021 - 22
Data Assurance Summary 2021–22
2021 - 22
Annual Performance Report Methodology 2021–22
2021 - 22
Reporting Criteria 2021–22
2021 - 22
Annual Performance Report 2021 22
2021 - 22
Annual Report and Financial Statements 2021–22
2020 - 21
Annual Performance Report – Additional Commentary 2020–21
2020 - 21
Appendix – APR Data Tables 2020–21
2020 - 21
Annual Performance Report Methodology 2020–21
2020 - 21
Reporting Criteria 2020–21
2020 - 21
Data Assurance Summary 2020–21
2020 - 21
Bioresources Market Information Template Working Published Data
2020 - 21
Annual Performance Report 2020–21
Annual Report and Financial Statements 2020–21
2019 - 20
Reporting Criteria 2019–20
2019 - 20
Annual Performance Report Methodology 2019–20
2019 - 20
Data Assurance Summary 2019–20
2019 - 20
APR - Wholesale Water and Wastewater Tables 2019–20
2019 - 20
Annual Performance Report 2019–20
2019 - 20
Annual Report and Financial Statements 2019–20
2018 - 19
Data Assurance Summary 2019–20
2019 - 20
Annual Performance Report 2019–20
2021 - 22
Appendix – APR supporting commentary 2021-22
2018 - 19
Annual Report and Financial Statements 2018–19
2018 - 19
Annual Performance Report 2018–19
2018 - 19
Data Assurance Summary Annual Performance Reporting
2018 - 19
APR data tables 4J to 4W and bio-resources
2018 - 19
Republication of tables 4N,4O and 4P
2018 - 19
Annual Performance Report Methodology 2018–19
2020 - 21
Annual Report and Financial Statements 2020-21
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