Cost assessment datasets and guidance

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

Price control deliverable payment model (worked example)

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

Additional Information Request – Energy Cost

11 August 2023
Bioresources Asset Condition Assessment Guidance

Bioresources Asset Condition Assessment scoring

 

12 October 2023