Our plans to manage droughts
Have your say on our plans to deal with water during a drought: 22 May - 14 August
Maintaining water supplies during droughts
As part of our water resource and supply management, we plan for how we’ll supply fresh, reliable water to our customers during droughts, while also protecting the environment.
To make sure we are always prepared to deal with water shortages, we review our Drought Plan every 5 years. Our current plan was published in 2022 and we have been developing our next plan which considers feedback from customers, lessons learnt from droughts in 2022 and 2025 and new laws to protect the environment. We’d like to hear your thoughts on this draft drought plan and if you think we’ve got it right.
You can read a summary of our draft Drought Plan and the full technical document below. You can also access a paper copy by appointment at our main office in Havant, Hampshire - please get in touch [email protected].
Draft Drought Plan
Our full draft plan to deal with water shortages during a drought.
Non Technical Summary
An overview of our plans to deal with water shortages during a drought.
What's in our drought plan?
Our drought plan sets out the actions we’ll take during a drought and sets out the different stages we monitor as a drought progresses.
It also tells you how we will keep you updated during a drought so you can stay informed at all times about the state of our water resources.
How we monitor drought conditions
What actions we'll take during a drought
How we'll keep everyone up to date
Our emergency plan for severe drought
Have your say
You can share your feedback on our plans between 22 May and 14 August by completing the Draft Drought Plan consultation questions below.
Consultation questions
You can also share your feedback by emailing Defra at [email protected], or writing to:
Drought Plan Consultation (Portsmouth Water)
Water ResourcesDepartment for Environment, Food and Rural Affairs
3rd Floor, Seacole Building
2 Marsham Street
London, SW1P 4DF
Following the consultation, we’ll publish a summary of the responses and any updates we make and publish our final plan in 2027.
Appendices and Environmental Assessments
We’ve carried out environmental assessments of this Drought Plan, a Strategic Environmental Assessment and a Habitats Regulation Assessment, as well as an environmental study of taking extra water from our source in West Sussex. You can read these below.
Appendix A - Pre-Consultation Details
Appendix B - WRSE Statement of Response
Appendix C - Drought Triggers Review
Appendix D - Drought Options Methodology
Appendix E - TUB and NEUBs Exceptions
Appendix F - HRA
Appendix Fb - HRA Location Plan
Appendix G - SEA
Appendix Ga - SEA Appendices
Appendix H - Communication Strategy
Appendix I - Testing Our Triggers
Frequently asked questions
Every water company must have a Drought Plan that explains how it would manage water supplies during prolonged dry weather or droughts. We are consulting on our Draft Drought Plan 2027 so customers, communities and stakeholders can share their views before it is finalised.
We are asking for feedback on:
How we would prepare for and respond to drought
The order in which water‑saving measures and restrictions could be introduced
How we would protect the environment
How we would communicate with customers
Whether the plan feels clear, fair and proportionate
No. This consultation is about planning ahead. The Drought Plan is only used if very dry conditions develop over a long period. You can check our current water situation here.
The consultation will run for 12 weeks, starting 22 May to 14 August.
A drought is not just a few weeks of hot weather. It develops when rainfall is consistently low over several seasons and groundwater levels do not recover, especially after winter.
Our water supplies come entirely from chalk groundwater, which relies heavily on winter rainfall to refill. Climate change means dry winters and hot summers are becoming more likely, so planning ahead helps us:
Protect water supplies for essential use
Reduce environmental harm
Avoid emergency measures where possible
Droughts are rare, but they do happen. The plan sets out actions that would only be used if dry conditions last a long time. Many measures may never be needed, but planning ensures we are ready.
We always start with actions that have the least impact on customers and the environment, including:
Water‑saving advice
Fixing leaks and managing water pressure
Encouraging voluntary reductions in water use
Temporary Use Bans (often called hosepipe bans) would only be considered if groundwater levels fall to very low levels after a prolonged dry period, and earlier actions have not reduced demand enough.
Restrictions would apply across our whole supply area, but there are important exemptions, for example:
Customers on the Priority Services Register
Health and safety uses
Some essential or welfare‑related activities
Household restrictions are introduced first to help protect jobs and essential services for as long as possible. Restrictions on businesses would only be considered in more severe droughts.
Protecting vulnerable customers is a priority at all stages. We:
Maintain a Priority Services Register
Apply exemptions where appropriate
Work with support organisations and local partners
Provide tailored communication and assistance
Customers (or their carers) can register for free via our website or by contacting our customer services team.
Reducing demand is always prioritised to limit environmental pressure. Where supply‑side actions are considered:
Detailed environmental assessments are carried out
Monitoring and mitigation plans are in place
Actions are temporary and closely controlled
A drought permit is a temporary permission to take more water from a specific groundwater source during a severe drought. It would only be used as a last resort and is subject to strict environmental conditions and monitoring.
Yes. The drought permit included in the plan has been supported by:
A Strategic Environmental Assessment (SEA)
A Habitats Regulations Assessment (HRA)
A detailed Environmental Assessment Report (EAR)
These show that impacts would be temporary, monitored and managed.
An extreme drought would be a very rare, long‑lasting event affecting multiple seasons, where all other actions have already been taken.
Before emergency measures, we would:
Strengthen water‑saving communications
Increase leakage and pressure management
Use short‑term drought actions designed to avoid emergencies
These are extremely unlikely and would only be used in the most severe and prolonged droughts, with support for vulnerable customers prioritised.
We would communicate regularly using:
Our website
Email and SMS
Social media
Local media
Direct engagement with councils, groups and businesses
Information would clearly explain:
What’s happening
Why actions are needed
What customers can do to help
We aim to provide as much advance notice as possible, normally including a consultation period before restrictions are introduced.
A drought ends when groundwater supplies recover, not simply when it rains. We look at:
Groundwater levels across multiple sites
Rainfall and recharge indicators
Demand trends
Environmental monitoring
We would:
Lift restrictions gradually
Thank customers for their efforts
Review what worked well
Share lessons learned and improve future plans
All consultation responses should be sent directly to Defra, or using the form on this webpage, which will also automatically send your response to Defra.
Yes. All responses are reviewed and considered. We will publish a Statement of Response explaining how feedback has influenced the final Drought Plan.
Working together to protect our water supplies
Find out how you can help protect our water resources with our essential water saving tips and find out the current water resources situation in our area. If we all make small changes, we can save water and protect our local water supplies.