Wholesale water models
| Version | Date of release |
| PR24 Cost Assessment Master Dataset, Wholesale Water Base Costs v2 | October 2022 |
| PR24 Cost Assessment Master Dataset, Wholesale Water Base Costs v3 | November 2022 |
| PR24 Cost Assessment Master Dataset, Wholesale Water Base Costs v4 | April 2023 |
Wholesale wastewater models
| Version | Date of release |
| PR24 Cost Assessment Master Dataset, Wholesale Wastewater Base Costs v2 | October 2022 |
| PR24 Cost Assessment Master Dataset, Wholesale Wastewater Base Costs v3 | November 2022 |
| PR24 Cost Assessment Master Dataset, Wholesale Wastewater Base Costs v4 | April 2023 |
Residential retail models
| Version | Date of release |
| PR24 Cost Assessment Master Dataset, Residential Retail v2 | October 2022 |
| PR24 Cost Assessment Master Dataset, Residential Retail v3 | November 2022 |
| PR24 Cost Assessment Master Dataset, Residential Retail Base Costs v4 | April 2023 |
Stata do files
| File | Version | Date of release |
| PR24 water base cost | PR24 water base cost v1 | October 2022 |
| PR24 water base cost v2 | November 2022 | |
| PR24 water base cost v3 | April 2023 | |
| PR24 wastewater base cost | PR24 wastewater base cost v1 | October 2022 |
| PR24 wastewater base cost v2 | November 2022 | |
| PR24 wastewater network plus base cost v3 | April 2023 | |
| PR24 residential retail | PR24 residential retail v1 | October 2022 |
| PR24 residential retail v2 | November 2022 | |
| PR24 residential retail v3 | April 2023 | |
| PR24 bioresources base cost | PR24 bioresources base cost v1 | November 2022 |
| PR24 bioresources base cost v3 | April 2023 |
NOTE: Any individual can open the above files, but in order to run the above files you will need a copy of Stata software. A license for this software is required and can be purchased from the official website of the software – https://www.stata.com/
Supporting spreadsheets
| File | Version | Date of release |
| Template and guidance for the submission of base econometric cost models ahead of the spring 2023 consultation | Template and guidance for the submission of base econometric cost models ahead of the spring 2023 consultation | November 2022 |
| Residential retail external data mapping | Residential retail external data mapping | October 2022 |
| Atypical expenditure adjustment calculations | Atypical expenditure adjustment calculations | October 2022 |
| Residential retail revenue | Residential retail revenue | October 2022 |
| Urban rainfall calculations | Urban rainfall calculations | October 2022 |
| Weighted average density – updated | Weighted average density – updated | October 2022 |
| Population density estimates using Middle Super Output Area population estimates | Population density estimates using Middle Super Output Area population estimates v1 | October 2022 |
| Population density estimates using Middle Super Output Area population estimates v2 | November 2022 | |
| Large STWs dataset (7B) and table 7D reconciliation | Large STWs dataset (7B) and table 7D reconciliation | October 2022 |
| Large STWs dataset | Large STWs dataset v1 | October 2022 |
| Large STWs dataset v3 | November 2022 | |
| Economies of scale at sewage treatment works derivation | Economies of scale at sewage treatment works variables derivation v1 | April 2023 |
Historical performance datasets
| Version | Date of release |
| Historical performance trends for PR24 v1.0 | 10 February 2023 |
| Historical performance trends for PR24 v1.1 | 14 February 2023 |
| Historical performance trends for PR24 v2.0 | 4 April 2023 |
Supporting guidance
| Guidance | Date of release |
| Information Notice 23/07 Assessing the influence of enhancement expenditure on historical performance trends for PR24 | 14 July 2023 |
| Information Notice 23/05 Further guidance on price control deliverables for PR24 | 4 July 2023
21 July 2023 |
| Industrial Emissions Directive Letter from Ofwat to Companies | 1 August 2023 |
| Energy Cost Letter from Ofwat to Water Companies | 11 August 2023 |
| Bioresources Asset Condition Assessment Guidance
Bioresources Asset Condition Assessment scoring
|
12 October 2023 |
Reservoir information request
| Document | Date of release |
| Reservoirs Data Request – August 2023 – Letter | August 2023 |
| Reservoirs Data Request – August 2023 – Spreadsheet | August 2023 |