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We consult on a range of subjects. View and comment on our consultations or browse our responses to consultations by others.

Find out about work to improve water quality and how we manage water resources in Wales.

Water quality in Wales has improved significantly over the past two decades. Find out about bathing water quality near you

Find information about how we manage urban waste water.

Find out about, and apply for River Dee Water Protection Zone consents

How to register a reservoir, appoint a panel engineer, produce a flood plan and report an incident.

All large raised reservoirs with a capacity of 10,000 cubic metres or more must be registered with us.

The main principles of the Reservoirs Act 1975 is to ensure large raised reservoirs are built, altered, brought into use, supervised, maintained, abandoned and discontinued under the guidance of qualified civil engineers.

If you own or operate a large, raised reservoir it may be designated as a high-risk reservoir. This guidance explains how we decide the designation, how you can be involved in making the right decision and how you can review or appeal a designation.

Our reservoir safety charging scheme for 2024-25

Periods of long dry spells and low water levels can affect the integrity of earth embankments. It’s also a good time to inspect the upstream face. Use this guidance to know what to look for and what to do.

If you own or manage a high-risk reservoir you must appoint a Supervising Engineer and tell us about this. This guidance explains what a Supervising Engineer does and help you appoint one.

If you own or manage a high-risk reservoir you must arrange to have it inspected by a suitably qualified civil engineer.

Your Inspecting Engineer will provide you with a report which contains recommendations which you must address.

When you appoint a reservoir Inspecting Engineer, you will be asked for information about the reservoir.

If you own or operate a reservoir, you need to prepare a flood plan to set out the actions you will take to respond to an incident. In an emergency you will not have time to do this properly.

Your reservoir flood plan sets out the actions you will take to deal with incidents at your reservoir. For it to be effective you need to keep it up to date.

Guidance for reservoir panel engineers to check reservoir flood plans are appropriate and proportionate.

If you want to abandon, reduce the capacity of, or remove a large raised reservoir, you must carry out certain activities.