Guidance

Preparing a hydrogeological impact assessment

When and how to prepare a hydrogeological impact assessment (HIA) before you apply for a groundwater abstraction licence.

• From: Environment Agency
• Published: 13 March 2025

Applies to England

• Publication for Northern Ireland
• Publication for Scotland
• Publication for Wales

Documents

Preparing a hydrogeological impact assessment

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Details

You must prepare a hydrogeological impact assessment (HIA) before you apply for a groundwater abstraction licence to: 

• work out the risks 
• design mitigation measures which manage the impact to other abstractions and the environment  

This guidance explains when and how to prepare a HIA before you apply for a groundwater abstraction licence.

Published 13 March 2025