Water Resources Management Plan
This plan sets out how we’ll create a resilient water future for customers in the South East and keep taps flowing during droughts.
Plan overview
Our Water Resources Management Plan (WRMP), published every five years, forecasts how much water we’ll need in the future and proposes a mix of options to make sure we have enough. We’re currently revising our draft plan for the next 50 years.
Our first consultation on our draft Water Resources Management Plan closed on 20th February 2023. We issued our Statement of Response in the summer of 2023, and our regulator asked for some revisions to be made to the plan.
We then held a public consultation on our draft Water Resource Management Plan (WRMP 2024) from 11 September to 4 December 2024.
Statement of Response and associated annexes
We consulted on our draft plans, which look out to 2075, between 14 November 2022 and 20 February 2023. We had over 500 responses and issued our Statement of Response (SoR) in August which addressed them. One of the main issues raised in the responses to our consultation was our proposed Hampshire Water Transfer and Water Recycling Project (HWTWRP). In combination with Portsmouth Water, we have produced an annex addressing the specific issues raised.
Draft WRMP Non-technical Summary
Statement of response WRMP 2024
Annex 1: list of respondents
Annex 2: survey questions
Annex 3: individuals and organisations
Annex 4: feedback - public and community groups
Annex 6: Water for Life Hampshire one
Annex 8: aquifer storage, recovery and recharge
Annex 51: responses to non-questionnaire respondents - general public
Annex 52: responses to non-questionnaire respondents - organisations
Annex 71: customer insights
Annex 72: WRMP consultation one
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Our Revised Draft WRMP 2024
Please find our revised draft WRMP24. We consulted on this in September 2024 - December 2024. We will be responding to this consultation in our Statement of Response which will be published in the first quarter of 2025.
Annex 2: Our plans for 2023-2025
Annex 3: Problem Characterisation
Annex 4: Drought Vulnerability Assessment
Annex 5: Stakeholder and Customer Engagement
Annex 6: Lessons learnt from 2022 drought
Annex 7a: Growth Forecast Methodology
Annex 7b: Growth Forecast Update
Annex 7c: Demand Forecast Methodology
Annex 7e: NHH Demand Forecast Update
Annex 8: Supply Forecast July 2024
Annex 9: Protecting and Enhancing the Environment
Annex 10: Regional Plan Methodologies
Annex 11: Baseline Supply Demand Balance Situations
Annex 14: Demand Management Strategy
Annex 15: Investment Modelling Results
Annex 16: Common Understanding of Bulk Transfers between Southern Water and Portsmouth Water
Annex 17: SEA Environment Report
Annex 18: Assessment of the WRMP 2024
Annex 18a: Addendum Southern Water July 2024
Annex 19: Water Framework Directive Assessment Report
Annex 19a: Water Framework Directive Assessment Report Addendum
Our existing WRMP 2019
Find out more about our last Water Resources Management Plan, published in December 2019, which details how we plan to keep your taps flowing for the next 50 years.
Our Water Resources Management Plan for 2020-70
Water Resources Management Plan 2019: Technical Overview
Annex 12
Annex 14: Strategic Environmental Assessment Main Report
Annex 14: Strategic Environmental Assessment Non-Technical Summary
Annex 14: Strategic Environmental Assessment Post Adoption Statement
Annex 15: Habitats Regulations Assessment Main Report
Annex 15: Habitats Regulations Assessment Non-Technical Summary
Annex 16: Water Framework Directive Assessment Main Report
Annex 16: Water Framework Directive Assessment Non-Technical Summary
Dry Year Annual Average (DYAA)
Hampshire
Andover
Isle of Wight
Kingsclere
Rural
Southampton East
Southampton West
Winchester
Kent
Medway East
Medway West
Thanet
Sussex
Brighton
Hastings
North
Worthing
Dry Year Peak Deployable Output (DYPDO)
Hampshire
Andover
Isle of Wight
Kingsclere
Rural
Southampton East
Southampton West
Winchester
Kent
Medway East
Medway West
Thanet
Sussex
Brighton
Hastings
North
Worthing
Dry Year Minimum Deployable Output (DYMDO)
Hampshire
Andover
Isle of Wight
Kingsclere
Rural
Southampton East
Southampton West
Winchester
Draft WRMP24 technical documents
We’ve produced more detail on how we developed our draft WRMP and the options we considered.
Bulk import (HSE) PWC to Otterbourne WSW (21Mld)
Bulk import (HSE) Thames to Southern Transfer - potable (120Mld) (Combination b)
Bulk import (KTZ) SEW RZ8 to near Canterbury (2 Mld)
Bulk import (KTZ) SEW RZ8 to near Canterbury (20Mld)
Bulk import (SNZ) Havant Thicket Reservoir to Pulborough WSW (20Mld)
Bulk import (SNZ) Havant Thicket Reservoir to Pulborough WSW (50Mld)
Bulk import (SNZ) SES to SNZ (10Mld)
Bulk import (SNZ) SEW RZ5 to Pulborough (10Mld)
Desalination (KME) Isle of Sheppey (10Mld)
Desalination (KME) Isle of Sheppey (20Mld)
Desalination (KME) Isle of Sheppey phase 2 (10Mld)
Desalination (KMW) Thames Estuary (10Mld)
Desalination (KMW) Thames Estuary (20Mld) (Development only)
Desalination (KMW) Thames Estuary (20Mld)
Desalination (KMW) Thames Estuary phase 2 (10Mld)
Desalination (KMW) Thames Estuary phase 2 (20Mld)
Desalination (KTZ) East Thanet (10Mld)
Desalination (KTZ) East Thanet (20Mld) Phase 2
Desalination (KTZ) East Thanet (20Mld)
Desalination (SBZ) Sussex Coast (10Mld) Phase 2
Desalination (SBZ) Sussex Coast (10Mld)
Desalination (SWZ) Tidal River Arun (10 Mld)
Drought option - supply (HSE) Candover (15.4Mld)
Drought option - supply (HSE) Lower Itchen sources from 2027 (38Mld)
Drought option - supply (HSE) Lower Itchen sources to 2027 (38Mld)
Drought option - supply (HSW) River Test (80Mld)
Drought option - supply (IOW) Caul Bourne (1.5Mld)
Drought option - supply (IOW) Eastern Yar (1Mld)
Drought option - supply (IOW) Lukely Brook (3Mld)
Drought option - supply (KMW) River Medway Scheme 1-4 (17Mld)
Drought option - supply (SHZ) Darwell reservoir 1-3 (1.2Mld)
Drought option - supply (SNZ) Pulborough surface water (Phases 1 to 3) (23Mld)
Drought option - supply (SNZ) Weir Wood (3.1Mld)
Drought option - supply (SWZ) East Worthing (2.5Mld)
Drought option - supply (SWZ) North Arundel (1.2Mld) version 2
Drought option - supply (SWZ) North Arundel (1.2Mld)
Education campaign (All resource zones)
Groundwater (HKZ) Newbury (1.3Mld)
Groundwater (HRZ) Romsey (4.8Mld)
Groundwater (IOW) Eastern Yar3 (1.5Mld)
Groundwater (IOW) Newchurch (LGS) (1.9Mld)
Groundwater (KME) Gravesend (2.7Mld)
Groundwater (SHZ) Rye Wells (1.5Mld)
Groundwater (SNZ) Petworth (4Mld) (Planning only)
Groundwater (SNZ) Petworth (4Mld)
Groundwater (SWZ) Pulborough Winter Transfer Stage 1 (2Mld)
Interzonal transfer (HAZ-HKZ) Hampshire Grid - reversible (10 Mld)
Interzonal transfer (HRZ-HSW) Romsey Town and Broadlands - bidirectional (3.1Mld)
Interzonal transfer (HRZ-HSW) Romsey Town and Broadlands - bidirectional (5Mld)
Interzonal transfer (HSE-HRZ) Abbotswood (1.1Mld)
Interzonal transfer (HSE-HWZ) Hampshire Grid - (38 Mld) bidirectional
Interzonal transfer (HSW-HRZ) Romsey Town and Broadlands - bidirectional (3.1Mld)
Interzonal transfer (HSW-HRZ) Romsey Town and Broadlands - bidirectional (5Mld)
Interzonal transfer (HWZ-HAZ) Hampshire Grid - (30 Mld) bidirectional
Interzonal transfer (KTZ-KME) Existing transfer (14Mld)
Interzonal transfer (KTZ-KMW) Utilise full existing transfer capacity (9Mld)
Interzonal transfer (SBZ-SWZ) Brighton to Worthing - bidirectional (40Mld)
Interzonal transfer (SNZ-SWZ) Pulborough WSW to Worthing (30Mld)
Interzonal transfer (SNZ-SWZ) Pulborough WSW to Worthing (60Mld)
Interzonal transfer (SWZ-SBZ) V6 valve additional capacity (13Mld)
Interzonal transfer Pulborough winter transfer stage 2 (4Mld)
Managed Aquifer Recharge (MAR) scheme (5.5 Mld)
Managed Aquifer Recharge (MAR) Scheme (5.5Mld) (Development only)
Marketing and comms campaign (All resource zones)
Programme of leakage reduction
Recycling (HSE) Hampshire Water Transfer and Water Recycling Project (60Mld)
Recycling (HSE) Woolston WTW (7.1 Mld)
Recycling (IOW) Sandown WTW (8.1Mld)
Recycling (KME) Sittingbourne Industrial Water recycling (7.5Mld)
Recycling (KMW) Medway WTW (12.8Mld)
Recycling (SHZ) Hastings WTW (15Mld)
Recycling (SHZ) Tunbridge Wells WTW (3.6Mld)
Recycling (SNZ) Horsham WTW (6.8Mld)
Recycling (SNZ) Littlehampton WTW (15Mld)
Roll out of smart metering (All resource zones)
Roll out of smart tariffs across the company (All resource zones)
Storage (SHZ) Raising Bewl 0.4m (3Mld)
Storage (SNZ) River Adur Offline Reservoir (19.5Mld) (Planning only)
Storage (SNZ) River Adur Offline Reservoir (19.5Mld)
Supply of water efficiency products and services (All resource zones)
Treatment capacity (HSE) Upgrade Otterbourne WSW (30 Mld)
Annex 14: T100: a Blueprint for a Water-efficient Culture for Southern Water Customers
Annex 15: T100 and Non-Household Option Identification Technical Plan
Annex 16: Smart Metering Formatting
Annex 18: Strategic Environmental Assessment (SEA) including Appendices A-F
Annex 19: Water Framework Directive Assessment (WFD)
Annex 20: Habitats Regulations Assessment (HRA) including Appendices A-C
Annex 23: Regional Plan Methodologies
In response to a request raised from a consultee during the draft Water Resource Management Plan 2024 (dWRMP) consultation, we have produced a short Addendum that collates and sets out data which is relevant to the Western Area and Water for Life – Hampshire Programme.
The collation of the data in this Addendum is intended to help readers better understand the information that has been provided in our draft plan, particularly in relation to abstraction during drought periods, on the Rivers Itchen and Test.
We worked with Water Resources South East (WRSE) – an alliance of the six water companies serving the South East – to develop a region-wide plan for water resources. The draft regional plan is reflected in our draft WRMP.
