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 Resources
Department 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.

Appendices and Environmental Assessments

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

Why is Portsmouth Water consulting on its Drought Plan?

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.

What is being consulted on?

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

Is there a drought?

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.

How long is the consultation open?

The consultation will run for 12 weeks, starting 22 May to 14 August.

What do you mean by a “drought”?

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.

Why does Portsmouth Water plan for droughts?

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

How likely is a drought?

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.

What happens first in a drought?

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

When would restrictions like hosepipe bans be introduced?

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.

Would restrictions apply to everyone?

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

Why are households usually restricted before businesses?

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.

What support is there for vulnerable customers?

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

How can someone register as a vulnerable customer?

Customers (or their carers) can register for free via our website or by contacting our customer services team.

How is the environment protected during a drought?

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

What is a drought permit?

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.

Has this drought permit been assessed for environmental impact?

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.

What is meant by “extreme drought”?

An extreme drought would be a very rare, long‑lasting event affecting multiple seasons, where all other actions have already been taken.

What would happen before emergency measures?

Before emergency measures, we would:

Strengthen water‑saving communications

Increase leakage and pressure management

Use short‑term drought actions designed to avoid emergencies

Could emergency measures like rota cuts or standpipes happen?

These are extremely unlikely and would only be used in the most severe and prolonged droughts, with support for vulnerable customers prioritised.

How would customers know what’s happening during a drought?

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

How much notice would customers get before restrictions?

We aim to provide as much advance notice as possible, normally including a consultation period before restrictions are introduced.

How would you know when a drought has ended?

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

What happens after a drought?

We would:

Lift restrictions gradually

Thank customers for their efforts

Review what worked well

Share lessons learned and improve future plans

How can I give my views?

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.

Will my feedback really make a difference?

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.