This document provides information on the groundwater situation for:
West Berkshire
North East 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 authority 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.
Thames groundwater situation updated for 25 February 2025.
18 February 2025
Thames groundwater situation updated for 18 February 2025.
13 February 2025
Added the latest groundwater situation updates.
4 February 2025
Added the latest groundwater situation updates for 4 February 2025.
29 January 2025
Added the latest groundwater situation dated 28 January 2025.
22 January 2025
Added the latest Thames groundwater situation dated 21 January 2025.
14 January 2025
Thames groundwater situation updated for 14 January 2025.
8 January 2025
Thames groundwater situation updated for 7 January 2025.
30 December 2024
Thames groundwater situation updated for 30 December 2024.
23 December 2024
Thames groundwater situation updated for 23 December 2024.
18 December 2024
Thames groundwater situation updated for 17 December 2024.
10 December 2024
Thames groundwater situation updated for 10 December 2024.
4 December 2024
Added Thames groundwater situation update - 3 December 2024
26 November 2024
Thames groundwater situation updated for 26 November 2024.
19 November 2024
Thames groundwater situation updated for 19 November 2024.
13 November 2024
Thames groundwater situation updated for 12 November 2024.
5 November 2024
Thames groundwater situation updated for 5 November 2024.
25 June 2024
Thames groundwater situation updated for 25 June 2024.
18 June 2024
Thames groundwater situation updated for 18 June 2024.
11 June 2024
Thames groundwater situation updated for 11 June 2024.
4 June 2024
Thames groundwater situation updated for 4 June 2024.
28 May 2024
Thames groundwater situation updated for 28 May 2024.
21 May 2024
Thames groundwater situation updated for 21 May 2024.
14 May 2024
Thames groundwater situation updated for 14 May 2024.
7 May 2024
Thames groundwater situation updated for 7 May 2024.
30 April 2024
Thames groundwater situation updated for 30 April 2024.
23 April 2024
Thames Groundwater situation updated as of 23 April.
16 April 2024
Updated the groundwater situation as of 16 April 2024.
9 April 2024
Updated the groundwater situation as of 9 April 2024.
2 April 2024
Updated the groundwater situation as of 2 April 2024.
26 March 2024
Updated the groundwater situation for 26 March 2024.
19 March 2024
Updated the groundwater situation as of 19 March 2024.
12 March 2024
Groundwater situation updated for 12 March.
7 March 2024
Updated the groundwater situation as of 5 March 2024.
1 March 2024
Updated the groundwater situation as of 1 March 2024.
27 February 2024
Updated the groundwater situation as of 27 February 2024.
20 February 2024
Updated with briefing dated 20 February 2024.
13 February 2024
Added the latest (13 February 2024) groundwater situation for the Thames area.
6 February 2024
Added the latest (6 February 2024) groundwater situation for the Thames area.
31 January 2024
Updated with briefing dated 30 January 2024.
24 January 2024
Updated with briefing 23 January 2024
16 January 2024
Updated with briefing dated 16 January 2024.
12 January 2024
Updated with briefing dated 12 January 2024.
10 January 2024
Updated with briefing dated 10 January 2024.
5 January 2024
Updated with briefing dated 5 January 2024.
2 January 2024
Updated with briefing dated 2 January 2024.
27 December 2023
Updated with briefing dated 27 December 2023.
19 December 2023
Updated with briefing dated 19 December 2023
12 December 2023
Updated with briefing dated 12 December 2023
5 December 2023
Updated with briefing dated 5 December 2023
28 November 2023
Updated with briefing dated 28 November 2023
22 November 2023
Updated with briefing dated 21 November 2023
15 November 2023
Updated with briefing note 14 November 2023.
8 November 2023
Updated with latest briefing dated 7 November 2023.
2 November 2023
Updated with groundwater briefing - dated 01 November 2023.
23 May 2023
Updated with latest briefing 23 May 2023.
16 May 2023
Updated with a briefing dated 16 May 2023.
9 May 2023
Updated with briefing dated 9 May 2023.
2 May 2023
Updated with briefing dated 2 May 2023.
25 April 2023
Updated with briefing dated 25 April 2023.
18 April 2023
Updated with briefing dated 18 April 2023.
17 April 2023
Updated with briefing dated 11 April 2023.
5 April 2023
Updated with briefing dated 4 April 2023.
29 March 2023
Updated with briefing dated 28 March 2023.
21 March 2023
Updated with briefing dated 21 March 2023.
14 March 2023
Updated with briefing dated 14 March 2023.
8 March 2023
Updated with briefing dated 7 March 2023.
28 February 2023
Updated with briefing dated 28 February 2023.
23 February 2023
Updated 21 February 2023 with latest briefing.
14 February 2023
Latest briefing added for 14 February 2023.
7 February 2023
Updated with briefing dated 7 February 2023.
1 February 2023
Updated with briefing dated 31 January 2023.
24 January 2023
Updating with briefing dated 24 January 2023.
20 January 2023
We have published an updated briefing note.
18 January 2023
We have published an updated briefing note.
10 January 2023
Updated groundwater situation 10 January 2023.
4 January 2023
Updated groundwater situation 4 January 2023.
4 May 2021
Update 04 May added.
20 April 2021
20 April update added.
29 March 2021
Updated groundwater situation 29 March 2021
22 March 2021
22 March groundwater situation update.
15 March 2021
Updated groundwater situation 15 March 2021.
8 March 2021
Updated groundwater situation 8 March 2021
1 March 2021
Updated groundwater situation 1 March 2021.
22 February 2021
Update groundwater situation 22 Feb.
15 February 2021
Updated groundwater situation 15 February 2021.
8 February 2021
Thames groundwater situation updated 08 Feb 2021.
3 February 2021
Updated groundwater situation 02 Feb 2021.
25 January 2021
Thames groundwater briefing note 25 January 2021
21 January 2021
Updated with briefing note 18 January 2021.
12 January 2021
Weekly update for 11 Januray 2021
6 January 2021
Update 6 January 2021 with latest briefing.
30 December 2020
Briefing note updated on 30 December 2020.
24 December 2020
New groundwater briefing note added.
2 June 2020
Update 01 June added - all alerts removed.
27 May 2020
Added 26 May 2020 update.
18 May 2020
18 May update added.
12 May 2020
Updated 11 May 2020.
4 May 2020
Page updated with the latest briefing. In the Wycombe area including Radnage and the lower Hughenden Valley, the groundwater flood alert will be removed on Monday 4 May 2020.
6 April 2020
Updated with latest briefing 6 April 2020.
31 March 2020
Updated with briefing 30 March 2020
25 March 2020
Updated with latest briefing 23 March 2020.
17 March 2020
Briefing note added for 16 March 2020
10 March 2020
Briefing added for 10 March 2020
3 March 2020
Updated with briefing dated 2 March 2020.
25 February 2020
Updated with briefing dated 24 February 2020.
18 February 2020
Updated with latest briefing, 17 February 2020
10 February 2020
Updated with latest briefing 10 February 2020
3 February 2020
03 February 2020 update
28 January 2020
Updated with latest situation and forecast 28 January 2020.
22 January 2020
Updated 21 January 2020 with current situation and forecast.
13 January 2020
Updated with briefing dated 13 January 2020.
7 January 2020
Briefing note dated 6 January 2020 added.
30 December 2019
Added the latest update (30 December 2019).
23 December 2019
Briefing note dated 23 December 2019 added.
16 December 2019
Latest information added - dated 16 Dec 19.
11 December 2019
Briefing note dated 10 Dec 2019 added
5 December 2019
4 December update
27 November 2019
Thames West area groundwater update: 26 November 2019
19 November 2019
Latest briefing note 19 Nov 2019
14 November 2019
New report for 13 November added.
7 June 2018
Latest report added - 7 June 2018.
24 May 2018
Latest report added.
17 May 2018
Latest report added.
10 May 2018
10 May report added.
3 May 2018
Updated groundwater briefing note.
27 April 2018
Latest document added.
19 April 2018
Added updated groundwater report.
13 April 2018
April 2018 report added.
13 March 2015
updated the PDF
19 February 2015
New report added.
21 January 2015
New report added.
23 December 2014
New briefing added.
25 November 2014
New report for November 2014 added.
2 June 2014
The latest update on monitored groundwater levels in the West Thames area.
22 May 2014
New briefing added on 22 May 2014.
16 May 2014
New briefing added for 16 May 2014.
9 May 2014
New data added for 9 May 2014.
2 May 2014
New briefing added for 2 May 2014.
25 April 2014
The latest briefing note for the West Thames area has been updated today - 25/04/2014