Policy paper: Thames: groundwater situation

Environment Agency

March 25
08:10 2020


This document provides information on the groundwater situation for:

  • West Berkshire
  • Wiltshire
  • Surrey
  • Windsor
  • Maidenhead
  • north east Hampshire
  • Buckinghamshire
  • Vale of White Horse

Flooding from groundwater can happen when the level of water within the rock or soil that makes up the land surface (known as the water table) rises. The level of the water table changes with the seasons due to variations in long term rainfall and water abstraction. When the water table rises and reaches ground level, water starts to emerge on the surface and flooding can happen.

Lead local flood authorities (the unitary or County Council) are responsible for managing the risk of flooding from groundwater. They set out how they plan to do this in their local flood risk management strategies.

The Environment Agency has a strategic overview for all sources of flooding including groundwater. This means they will provide support to other risk management authorities. They supply information in the form of monitored groundwater levels. In some areas that have historically experienced groundwater flooding, the Environment Agency provide a groundwater alert or warning service.

Published 28 March 2014
Last updated 25 March 2020 +show all updates
  1. Updated with latest briefing 23 March 2020.

  2. Briefing note added for 16 March 2020

  3. Briefing added for 10 March 2020

  4. Updated with briefing dated 2 March 2020.

  5. Updated with briefing dated 24 February 2020.

  6. Updated with latest briefing, 17 February 2020

  7. Updated with latest briefing 10 February 2020

  8. 03 February 2020 update

  9. Updated with latest situation and forecast 28 January 2020.

  10. Updated 21 January 2020 with current situation and forecast.

  11. Updated with briefing dated 13 January 2020.

  12. Briefing note dated 6 January 2020 added.

  13. Added the latest update (30 December 2019).

  14. Briefing note dated 23 December 2019 added.

  15. Latest information added - dated 16 Dec 19.

  16. Briefing note dated 10 Dec 2019 added

  17. 4 December update

  18. Thames West area groundwater update: 26 November 2019

  19. Latest briefing note 19 Nov 2019

  20. New report for 13 November added.

  21. Latest report added - 7 June 2018.

  22. Latest report added.

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