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.
Gallwch hefyd weld ein Cynllun Ymrwymiad Gwasanaeth ar gyfer 2023-2024 isod.
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.
2023-2024
Welsh Water Service Commitment Plan
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211.3kB, PDF
2022-2023
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
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637.7kB, PDF
APR-Part-2-v2
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638kB, PDF
APR-Part-3
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2.4MB, PDF
APR-Part-3-v2
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2.4MB, PDF
APR-Parts-4-to-11
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1.3MB, PDF
APR-Parts-4-to-11-v2
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1.3MB, PDF
APR-Tables-part-3
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1.7MB, XLSX
APR-Tables-part-3-v2
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1.7MB, XLSX
APR-Tables-parts-1-to-11-excluding-part-3
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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
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2.1MB, XLSX
Data-Assurance-Summary
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245.3kB, PDF
In-period-adjustment-model
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342.7kB, XLSX
In-Period-ODI-submission
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330.8kB, PDF
2021-2022
Annual Performance Report 2021-2022 Overview
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786.9kB, PDF
Annual Performance Report 2021-2022 Part 1
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662.3kB, PDF
Annual Performance Report 2021-2022 Part 1 v2 1 August 2022
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815.2kB, PDF
Annual Performance Report 2021-2022-Part 1 v3 24 January 2023
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815.9kB, PDF
Annual Performance Report 2021-2022 Part 2
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650.9kB, PDF
Annual Performance Report 2021-2022 Part 3
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2MB, PDF
Annual Performance Report 2021-2022-Part 3 v2 23 January 23
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4.4MB, PDF
Annual Performance Report - 2021-2022 Parts 4 to 11
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3MB, PDF
Annual Performance Report 2021-2022 Parts 4 to 11 v2 24 January 2023
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2.5MB, PDF
Data Assurance Summary 2021-2022
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338.8kB, PDF
Accounting Methodology Statement
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985.1kB, PDF
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3
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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
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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
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1.7MB, XLSX
In-Period ODI Submission 2021-22
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315.8kB, PDF
In-Period Adjustments Model - 2022
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345.6kB, XLSX
2021_22 Commentary Carbon Footprint
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162.9kB, PDF
WSH Water catchments improved PCWt7 AnnualReport 2022
Lawrlwytho
335.7kB, PDF
2020-2021
Annual Performance Report 2020-2021 Overview
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768.7kB, PDF
Annual Performance Report 2021 - Part 1 Addendum IF
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198.4kB, PDF
Annual Performance Report 2020-2021 Part 1
Lawrlwytho
758.7kB, PDF
Annual Performance Report 2020-2021 Part 2
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639.3kB, PDF
Annual Performance Report 2020-2021 Part 3
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2MB, PDF
Annual Performance Report - 2020-2021 Parts 4 to 9 - v2
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2.9MB, PDF
Data Assurance Summary 2020-2021
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609.7kB, PDF
Accounting-Methodology-Statement-2020-2021
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1MB, PDF
Annual Performance Report 2020-2021 Tables Parts 1 to 9 excluding part 3 v2
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1.7MB, XLSX
Annual Performance Report 2020-2021 Tables Part 3
Lawrlwytho
1.7MB, XLSX
In-Period ODI Submission 2020-21 WSH
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446.3kB, PDF
2020-21 In-Period Draft Determination Response WSH
Lawrlwytho
208.1kB, PDF
PR19 In-Period Adjustments Model - March 2021 v14 WSH
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301.4kB, XLSX
2019 - 2020
Annual Performance Report 2020-2021 Overview
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768.7kB, PDF
Annual Performance Report 2019-2020 Part 1
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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
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2.6MB, PDF
Risk and Compliance Statement - APR Part 5
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471.6kB, PDF
Data Assurance Summary
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821.4kB, PDF
PR19 Blind Year Submission July 2020
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1MB, PDF
Accounting Separation and Methodology Statement 2019-2020
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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