Adroddiadau Perfformiad Blynyddol
Mae ein Hadroddiad Perfformiad Blynyddol yn cynnwys gwybodaeth sy'n caniatáu i gwsmeriaid a rhanddeiliaid adolygu ein perfformiad ac ein cymharu â chwmnïau eraill yn y sector.
Hefyd, mae'n darparu gwybodaeth benodol am y cynnydd yr ydym wedi'i wneud wrth gyflawni canlyniadau i’r cwsmeriaid a lefelau gwasanaeth a'n perfformiad ariannol (gan gynnwys gwybodaeth fanwl am refeniw a chostau).
Mae'n ofynnol i ni gyhoeddi un Adroddiad Perfformiad Blynyddol mewn fformat a bennwyd gan Ofwat.
Os oes angen y dogfennau arnoch mewn fformat gwahanol fel print bras neu braille, ffoniwch ein tîm cymorth arbenigol ar 0330 0413394 a fydd yn trefnu copi mewn fformat sy’n gweithio i chi.
Adroddiad Perfformiad Blynyddol 2024-25
Main Documents
APR-Tables-parts-1-to-11-excluding-part-3
Lawrlwytho
2.8MB, XLSX
APR-Tables-parts-1-to-11-excluding-part-3-v2
Lawrlwytho
2.8MB, XLSX
APR-Tables-part-3
Lawrlwytho
2.5MB, XLSX
APR-Overview
Lawrlwytho
2.1MB, PDF
APR-Part-1
Lawrlwytho
1.8MB, PDF
APR-Part-2
Lawrlwytho
2MB, PDF
APR-Part-3
Lawrlwytho
4.9MB, PDF
APR-Parts-4-to-11
Lawrlwytho
4.3MB, PDF
APR-Parts-4-to-11-v2
Lawrlwytho
4.3MB, PDF
Board-Statements
Lawrlwytho
7.2MB, PDF
Accounting-Methodology-Statement
Lawrlwytho
2.2MB, PDF
Additional Reporting Requirements
Water-Catchment-Report
Lawrlwytho
16.3MB, PDF
WSH - Ft4 Surface Water Removed From Sewers - Benefits Assessment
Lawrlwytho
252.3kB, PDF
WSH -Wt8 Lead Pipes Replaced - Benefits Assessment
Lawrlwytho
364.3kB, PDF
WSH - Ft10 Community Education - Benefits Assessment
Lawrlwytho
343.9kB, PDF
WSH - Ft11 Visitors to Recreational Facilities - Benefits Assessment
Lawrlwytho
1.1MB, PDF
PR19 Blind Year Submission
PR24-FD-PD05-Revenue-forecasting-incentive-WSH-BYA
Lawrlwytho
252.3kB, XLSX
PR24-FD-PD12-Cost-of-new-debt-Welsh-Water-BYA
Lawrlwytho
232.4kB, XLSM
WSH-DD-103 Tax-reconciliation-tool-Dec-2020-v3b-BYA
Lawrlwytho
128.9kB, XLSB
PR24-FD-PD14-Cost-sharing-reconciliation-WSH-BYA
Lawrlwytho
440.9kB, XLSM
PR24-FD-PD10-Developer-services-revenue-adjustment-mechanism-WSH-BYA
Lawrlwytho
120.4kB, XLSX
RPI-CPIH-wedge-model_v5.7-WSH-BYA
Lawrlwytho
2.7MB, XLSX
PR24-FD-PD07-Bioresources-Reconciliation-WSH-BYA
Lawrlwytho
125.9kB, XLSX
PR24-FD-PD08-Residential-Retail-Reconciliation-WSH-BYA
Lawrlwytho
140.8kB, XLSX
PR24PD23-PR19-Business-Retail-Reconciliation-WSH-BYA
Lawrlwytho
245.6kB, XLSX
PR24-FD-PD16-Land-Sales-Dwr-Cymru-WSH-BYA
Lawrlwytho
151.6kB, XLSX
2024-25-ODI-differences-model_v1.1-WSH-BYA
Lawrlwytho
189.3kB, XLSX
In-period-adjustments-model-for-2024-25_v1.1-WSH-BYA
Lawrlwytho
301.7kB, XLSX
PR24-FD-PD24-RCV-adjustments-model-Dwr-Cymru-WSH-BYA
Lawrlwytho
1.7MB, XLSX
PR24-FD-PD25-Revenue-adjustments-model-Dwr-Cymru-WSH-BYA
Lawrlwytho
6.4MB, XLSX
Blind-Year-2025-Data-Tables-May-2025-WSH-BYA
Lawrlwytho
1.1MB, XLSX
PR19 Blind Year Reconciliation Commentary
Lawrlwytho
6.8MB, PDF
Data Consolidation
Open-data-rationale
Lawrlwytho
316.1kB, PDF
Consolidated-PC-Data
Lawrlwytho
50.3kB, XLSX
CSVConsolidated-PC-Data
Lawrlwytho
142.9kB, CSV
CSVConsolidated-PC-MetaData
Lawrlwytho
2.1kB, CSV
Consolidated APR Data
Lawrlwytho
8.5kB, XLSX
CSVConsolidated APR Data
Lawrlwytho
1.6MB, XLSX
CSVConsolidated APR Metadata
Lawrlwytho
2kB, CSV
Previous Annual Performance Reports
Data Consolidation
Consolidated APR Data
Lawrlwytho
1.4MB, XLSX
CSVConsolidated APR Data
Lawrlwytho
7.1MB, CSV
CSVConsolidated APR MetaData
Lawrlwytho
2kB, CSV
Consolidated-PC-Data
Lawrlwytho
54.4kB, XLSX
CSVConsolidated-PC-Data
Lawrlwytho
142.5kB, CSV
CSVConsolidated-PC-MetaData
Lawrlwytho
2.1kB, CSV
2023-2024
APR-Overview
Lawrlwytho
824kB, PDF
APR-Part-2
Lawrlwytho
1.2MB, PDF
APR-Part-3
Lawrlwytho
1.4MB, PDF
APR-Tables-part-3
Lawrlwytho
1.7MB, XLSX
Board-Statements
Lawrlwytho
1.1MB, PDF
Accounting-Methodology-Statement
Lawrlwytho
1.5MB, PDF
Data-Assurance-Summary
Lawrlwytho
2.7MB, PDF
In-period-adjustment-model
Lawrlwytho
346.1kB, XLSX
In-Period-ODI-submission
Lawrlwytho
726.7kB, PDF
Open-data-rationale
Lawrlwytho
697kB, PDF
Water-Catchment-Report
Lawrlwytho
2.2MB, PDF
2023-2024 Archive
APR-Part-1
Lawrlwytho
1.5MB, PDF
APR-Parts-4-to-11
Lawrlwytho
1.9MB, PDF
APR-Tables-parts-1-to-11-excluding-part-3
Lawrlwytho
3.1MB, XLSX
2022-2023
APR-Overview
Lawrlwytho
613.4kB, PDF
APR-Part-1
Lawrlwytho
850.6kB, PDF
APR-Part-1-v2
Lawrlwytho
851kB, PDF
APR-Part-1-v3
Lawrlwytho
853.8kB, PDF
APR-Part-2
Lawrlwytho
637.7kB, PDF
APR-Part-2-v2
Lawrlwytho
638kB, PDF
APR-Part-3
Lawrlwytho
2.4MB, PDF
APR-Part-3-v2
Lawrlwytho
2.4MB, PDF
APR-Parts-4-to-11
Lawrlwytho
1.3MB, PDF
APR-Parts-4-to-11-v2
Lawrlwytho
1.3MB, PDF
APR-Tables-part-3
Lawrlwytho
1.7MB, XLSX
APR-Tables-part-3-v2
Lawrlwytho
1.7MB, XLSX
APR-Tables-parts-1-to-11-excluding-part-3
Lawrlwytho
2.1MB, XLSX
APR-Tables-parts-1-to-11-excluding-part-3-v2
Lawrlwytho
2.1MB, XLSX
APR-Tables-parts-1-to-11-excluding-part-3-v3
Lawrlwytho
2.1MB, XLSX
Data-Assurance-Summary
Lawrlwytho
245.3kB, PDF
In-period-adjustment-model
Lawrlwytho
342.7kB, XLSX
In-Period-ODI-submission
Lawrlwytho
330.8kB, PDF
2021-2022
Annual Performance Report 2021-2022 Overview
Lawrlwytho
786.9kB, PDF
Annual Performance Report 2021-2022 Part 1
Lawrlwytho
662.3kB, PDF
Annual Performance Report 2021-2022 Part 1 v2 1 August 2022
Lawrlwytho
815.2kB, PDF
Annual Performance Report 2021-2022-Part 1 v3 24 January 2023
Lawrlwytho
815.9kB, PDF
Annual Performance Report 2021-2022 Part 2
Lawrlwytho
650.9kB, PDF
Annual Performance Report 2021-2022 Part 3
Lawrlwytho
2MB, PDF
Annual Performance Report 2021-2022-Part 3 v2 23 January 23
Lawrlwytho
4.4MB, PDF
Annual Performance Report - 2021-2022 Parts 4 to 11
Lawrlwytho
3MB, PDF
Annual Performance Report 2021-2022 Parts 4 to 11 v2 24 January 2023
Lawrlwytho
2.5MB, PDF
Data Assurance Summary 2021-2022
Lawrlwytho
338.8kB, PDF
Accounting Methodology Statement
Lawrlwytho
985.1kB, PDF
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3
Lawrlwytho
1.6MB, XLSX
APR Tables 202122 tables excluding tables 3A3I v6 24 January 2023
Lawrlwytho
1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3 v2 29 July 2022
Lawrlwytho
1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3 v3 1 August 2022
Lawrlwytho
1.6MB, XLSX
Annual Performance Report 2021-22 Tables Parts 1 to 11 excluding part 3 v4 21 September 2022
Lawrlwytho
1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3 v5 22 September 2022
Lawrlwytho
1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Part 3
Lawrlwytho
1.7MB, XLSX
APR Tables 202122 part 3 Performance Commitmentsv2 24 January 2023
Lawrlwytho
1.7MB, XLSX
In-Period ODI Submission 2021-22
Lawrlwytho
315.8kB, PDF
In-Period Adjustments Model - 2022
Lawrlwytho
345.6kB, XLSX
2021_22 Commentary Carbon Footprint
Lawrlwytho
162.9kB, PDF
WSH Water catchments improved PCWt7 AnnualReport 2022
Lawrlwytho
335.7kB, PDF
2020-2021
Annual Performance Report 2020-2021 Overview
Lawrlwytho
768.7kB, PDF
Annual Performance Report 2021 - Part 1 Addendum IF
Lawrlwytho
198.4kB, PDF
Annual Performance Report 2020-2021 Part 1
Lawrlwytho
758.7kB, PDF
Annual Performance Report 2020-2021 Part 2
Lawrlwytho
639.3kB, PDF
Annual Performance Report 2020-2021 Part 3
Lawrlwytho
2MB, PDF
Annual Performance Report - 2020-2021 Parts 4 to 9 - v2
Lawrlwytho
2.9MB, PDF
Data Assurance Summary 2020-2021
Lawrlwytho
609.7kB, PDF
Accounting-Methodology-Statement-2020-2021
Lawrlwytho
1MB, PDF
Annual Performance Report 2020-2021 Tables Parts 1 to 9 excluding part 3 v2
Lawrlwytho
1.7MB, XLSX
Annual Performance Report 2020-2021 Tables Part 3
Lawrlwytho
1.7MB, XLSX
In-Period ODI Submission 2020-21 WSH
Lawrlwytho
446.3kB, PDF
2020-21 In-Period Draft Determination Response WSH
Lawrlwytho
208.1kB, PDF
PR19 In-Period Adjustments Model - March 2021 v14 WSH
Lawrlwytho
301.4kB, XLSX
2019 - 2020
Annual Performance Report 2020-2021 Overview
Lawrlwytho
768.7kB, PDF
Annual Performance Report 2019-2020 Part 1
Lawrlwytho
736.6kB, PDF
Annual Performance Report 2019-2020 Part 2
Lawrlwytho
506.1kB, PDF
Annual Performance Report 2019-2020 Part 3
Lawrlwytho
3.5MB, PDF
Annual Performance Report 2019-2020 Part 4
Lawrlwytho
2.6MB, PDF
Risk and Compliance Statement - APR Part 5
Lawrlwytho
471.6kB, PDF
Data Assurance Summary
Lawrlwytho
821.4kB, PDF
PR19 Blind Year Submission July 2020
Lawrlwytho
1MB, PDF
Accounting Separation and Methodology Statement 2019-2020
Lawrlwytho
1MB, PDF
2018-2019
Annual Performance Report 2018-19 Overview
Download
1.2MB, PDF
Annual Performance Report 2018-19 Part 1
Download
943.2kB, PDF
Annual Performance Report 2018-19 Part 2
Download
889.9kB, PDF
Annual Performance Report 2018-19 Part 3
Download
3.5MB, PDF
Annual Performance Report 2018-19 Part 4
Download
4.2MB, PDF
Risk and Compliance Statement APR 2018-19 Part 5
Download
332.5kB, PDF
PR14 Reconciliation Rulebook 2018-2019
Download
1.2MB, PDF
Accounting Separation Methodology Statement 2018-19
Download
2.2MB, PDF
2017-2018
Annual Performance Report 2017-2018 Overview
Download
1.6MB, PDF
Annual Performance Report 2017-2018 Part 1
Download
847.3kB, PDF
Annual Performance Report 2017-2018 Part 2
Download
760.7kB, PDF
Annual Performance Report 2017-2018 Part 3
Download
3.7MB, PDF
Annual Performance Report 2017-2018 Part 4
Download
3.4MB, PDF
Annual Performance Report 2017-2018 Part 5 - Risk and Compliance
Download
524.7kB, PDF
Annual Performance Report 2017-2018 Data Assurance Summary
Download
1.1MB, PDF
Accounting Separation Methodology Statement 2017-2018
Download
1.3MB, PDF