Portsmouth Water has been supplying high-quality, reliable, affordable water to our customers in West Sussex and Hampshire for more than 160 years.
Our business plan for 2025-30 has been submitted to Ofwat, the water industry regulator. We created this plan with your input and it sets out the details of how we plan to consistently deliver high levels of service, the lowest bills in the industry and maintaining our customers’ trust to do so.
It’s our responsibility to plan, invest wisely and evolve to make sure we can continue to meet and exceed these high standards in a changing and very challenging landscape.
Our purpose is to deliver ‘Excellence in Water. Always’. This is what our plan will deliver tomorrow and in the long term. At the heart of our plan is the evolution of our network to a fully smart platform and the installation of smart meters for nearly all our customers by 2035, supported by reliable assets and processes, all managed, operated and maintained by a skilled workforce. Select any of the documents to read more about the aspects of how we plan to achieve this.
Please feel free to use our Document Navigation Guide, as this details the structure of our Business Plan.
Our Business Plan to 2030
Supporting documents
Vision and long term plans
Further documentation
In October we submitted our ambitious plans for the next five years to our financial regulator, Ofwat.
At the start of July, Ofwat published its draft determination of our Business Plan for 2025 – 2030. This can be viewed here: Draft Determinations - Ofwat
We have reviewed this over the summer; the documents below detail our response to Ofwat’s Draft Determination.
Executive SummaryRead Portsmouth Waters PR24 Draft Determination Executive Summary
Response DocumentsPRT EA 00 Draft Determination response - Expenditure Allowances
PRT OUT 00 - PR24 Draft Determination response - Outcomes
PRT RR 00 - PR24 Draft Determination response - Risk and Return_Redacted
PRT HT 00 - PR24 Draft Determination response - Havant Thicket Reservoir
Supporting DocumentsPRT EA 01 - UV-Crypto Project Review - This document is available on request
PRT EA 02 - Nitrate Resilience Project Review - This document is available on request
PRT EA 03 - eCAF Project ReviewThis document is available on request
PRT EA 04 - Service Reservoir Project Review - This document is available on request
PRT EA 04 Appendix A - Service Reservoir Options - This document is available on request
PRT EA 04 Appendix B - Service Reservoir Overview of Cost Estimates - This document is available on request
PRT EA 04 Appendix C - Service Reservoir Detailed Costs - This document is available on request
PRT EA 04 Appendix D - Service Reservoir Cost Estimates - This document is available on request
PRT EA05 Investment Option and Valuation in Copperleaf - Enhancement Cases
PRT07.08 - PFAS Resilience Enhancement Investment Case - This document is available on request
PRT HT01 - First Economics Report on DD Havant Thicket WACC
PRT HT02 - NERA Havant Thicket WACC DD Response
PRT HT03 - Moodys Report UK Water PR24 DD increases sector risk Aug 2024
PRT HT 04 - Oxera Investability report for Water UK
PRT RR 01 PR24 DD - Financial Resilience Board Assurance Centrus Financial (Redacted)
PRT RR 02 Baringa - Ofwat proposals for energy costs in AMP8
PRT RR 03 Oxera Investability report for Water UK
PRT RR 04 PFAS Uncertainty at PR24
Data Tables and CommentariesPRT51 PR24 - Business Plan Tables DD Submission
PRT PR24 - New Additional Business Plan Data Tables
PRT DD Commentary August 2024 - Outcomes
PRT DD Commentary August 2024 - Costs Wholesale
PRT DD Commentary August 2024 - Risk and Return
PRT DD Commentary August 2024 - Water Resources
PRT DD Commentary August 2024 - Past Delivery
PRT DD Commentary August 2024 - Supplementary Tables
PRT DD Commentary August 2024 - Additional tables
Ofwat ModelsPRT PR24DD - Draft Determinations Company Representation Proforma Submitted
PRT PR24DD - Cost of new debt reconciliation
PRT PR24DD - Cost sharing total costs reconcilation
PRT PR24DD - Developer Services Reconciliation Model
PRT PR24DD - Other Adjustments
PRT PR24DD - RCV Adjustments Model
PRT PR24DD - Residential Retail Reconciliation PRT-AUG24
PRT PR24DD - Revenue Adjustments Model Portsmouth Water
PRT PR24DD - Revenue Forecasting Incentive
PRT PR24DD - RPI CPIH Wedge Model
PRT03: Engaging and Understanding Our Customers and Communities
Please see 'Customer Insight Documents' section
PRT04: Delivering for Our Customers and Communities
PRT04.01 - Optopia Carbon Report
PRT05: Delivering Outcomes for Our Customers
PRT05.01 - Artesia Review of PCC
PRT07: Our Investment Plan 2023-2030
PRT07.01 - Security Resilience and eCAF Compliance at Operational Sites
PRT07.02 - Raw Water Resilience Enhancements (Disinfection)
PRT07.03 - Raw Water Deterioration and Drought Capacity Enhancements
PRT07.04 - The Isolation and Recovery of Service Reservoirs
PRT07.05 - WINEP and Protecting the Environment
- PRT07.05.01: Portsmouth Water Investigation Costing (SDS-JN) - This document is available on request
- PRT07.05.02: Portsmouth Water WINEP PR24 Development - This document is available on request
- PRT07.05.03: Supplemental_WINEP Methodology and driver codes - This document is available on request
PRT07.06 Reducing Customer Side Demand (Universal Smart Metering)
- PRT07.06.01 Report - WSM WDM roll-out - CBA findings - This document is available on request
PRT07.07 Lead Strategy Implementation
PRT09: Securing Value for Money
PRT09.01 Frontier Economics - High-level forecasts of Portsmouth PR24 allowances
PRT10: Innovation to Enhance Our Service Delivery
PRT10.02 PW Innovation Framework Draft V11
PRT10.03 UK-2050-Water-Innovation-Strategy
PRT13: Aligning Risk and Return
PRT13.01 Credit_Opinion-Portsmouth-Water-Limited-10Mar2023-PBC_1353763 (005)
PRT13.02 Havant Thicket Reservoir Allowed Cost of Capital (First Economics Report)
PRT13.03 Cost of Capital for Havant Thicket (NERA Economic Consulting)
PRT13.04 Financeability and Financial Resilience Centrus Assurance
PRT15: Board Assurance
PRT15.03 - Jacobs assurance report
PRT15.04 - Jacobs Documents assurance report
PRT15.05 - Jacobs Data Tables assurance report
PRT15.06 - KPMG Data Tables assurance report - This document is available on request
PRT17: Water Resource Management Plan
PRT62.01 Cost-of-new-debt-indexation-model
PRT62.02 Developer Services Reconciliation Model
PRT62.03 Gearing-Outperformance-Sharing-Mechanism
PRT62.04 PR19-Innovation-funding-reconciliation-model
PRT62.05 PR19IPD04-in-period-adjustments-model
PRT62.06 PR24-RCV-adjustments-feeder-model
PRT62.07 PR24-Revenue-adjustments-feeder-mode
PRT62.08 Residential-Retail-Reconciliation-Model
PRT62.10 RPI-CPIH-wedge-true-up-model
PRT62.11 Tax-reconciliation-tool
PRT64 PR24_Business_plan_tables_to_financial_model_mapping_tool_v5_25Sep
PRT65 PR24-financial-model-v21a 25Sept
PRT03.67 Affordability and Acceptability Testing - Quantitative Report
PRT03.75 Summary of Engagement Triangulation
Please download our pack of Customer Engagement (74,337KB) to view the rest of our evidenced Customer Insight.Below you will see a list of the documents you will find in this .zip file. These are referenced in PRT03 Engaging and Understanding Our Customers and Communities of our Business Plan:
PRT03.01 PR19 Customer Engagement and Triangulation
PRT03.02 Deliberative Qualitative Research
PRT03.03 22a. Foundational Customer Research
PRT03.04 Stakeholder Business Plan Priorities
PRT03.05 25a. Stimulus
PRT03.06 25b. Discussion Guide
PRT03.07 25c. Research Reading Materials
PRT03.08 Barometer Panel - Wave 1
PRT03.09 26a. Questionnaire
PRT03.10 Customer Priorities
PRT03.11 Supporting Vulnerable Customers
PRT03.12 Barometer Panel - Wave 2
PRT03.13 39a. Questionnaire
PRT03.14 Customer Advisory Panel - Wave 1
PRT03.15 40a. Stimulus
PRT03.16 40b. HH Discussion Guide
PRT03.17 40c. NHH Discussion Guide
PRT03.18 Vulnerable Customer
PRT03.19 46b. Discussion Guide
PRT03.20 Barometer Panel - Wave 3
PRT03.21 57a. Questionnaire
PRT03.22 Cross Subsidy Research
PRT03.23 58a. Questionnaire
PRT03.24 Future Customers Panel
PRT03.25 60a. Day 1 Presentation
PRT03.26 60b. Day 2 Presentation
PRT03.27 60c. Stimulus
PRT03.28 60d. Discussion Guide Day 1
PRT03.29 60e. Discussion Guide Day 2
PRT03.30 Customer Advisory Panel - Wave 2
PRT03.31 61a. Stimulus
PRT03.32 61b. NHH Discussion Guide
PRT03.33 Barometer Panel - Wave 4
PRT03.34 63a. Questionnaire
PRT03.36 64a. HH Stimulus
PRT03.37 64b. NHH Stimulus
PRT03.35 Customer Advisory Panel - Wave 3
PRT03.39 67a. Stimulus
PRT03.40 67b. Discussion Guide
PRT03.38 Future Customers Panel - Plan Choices
PRT03.39 67a. Stimulus
PRT03.40 67b. Discussion Guide
PRT03.41 Customer Advisory Panel - Wave 4
PRT03.42 68a. Discussion Guide
PRT03.43 68b. Stimulus
PRT03.44 Plan Choices - NHH Customers
PRT03.45 69a. Stimulus
PRT03.46 69b. NHH Discussion Guide
PRT03.47 69c. Developers Discussion Guide
PRT03.48 Plan Choices - Full Triangulation
PRT03.49 70a. Survey
PRT03.50 Affordability and Acceptability Testing - Qualitative Report
PRT03.51 71a. Deliberative Moderator Guide
PRT03.52 71b. Online NHH Discussion Guide
PRT03.53 71c. Health and Vulnerable Discussion Guide
PRT03.54 71d. HH Stimulus
PRT03.55 71.e HH Pre Read inc. Recording
PRT03.56 71f. NHH Depth Stimulus
PRT03.57 71g. NHH Pre Read
PRT03.58 71h. Vulnerable Pre Read
PRT03.59 71i. Vulnerable Depth Stimulus
PRT03.60 Smart Meter Hyper Care
PRT03.61 73a. Discussion Guide
PRT03.62 73b. Stimulus
PRT03.63 Hard to Reach Customers
PRT03.64 74a. Discussion Guide
PRT03.65 74b. Stimulus
PRT03.66 LTDS
PRT03.68 76a. Survey Questionnaire
PRT03.69 Customer Advisory Panel - Wave 5 and Customer Barometer Panel - Wave 6
PRT03.70 77a. Discussion Guide
PRT03.71 77b. Stimulus CAP
PRT03.72 77c. Barometer Questionnaire
PRT03.73 77d. Stimulus Barometer
PRT03.74 77e. Student Barometer Questionnaire
PRT03.76 78a. Synthesis and Triangulation Report 1
PRT03.77 78b. Synthesis and Triangulation Report 2
PRT03.78 78c. Synthesis and Triangulation Report 3
PRT03.79 78d. Synthesis and Triangulation Report 4
PRT03.80 78e. Synthesis and Triangulation Report 5
PRT03.81 78f. Synthesis and Triangulation Report 6