Thames groundwater situation: 13 May 2025
Updated 19 May 2025
Applies to England
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This publication is available at /government/publications/thames-west-area-groundwater-situation/thames-groundwater-situation-6-may-2025
Current situation
Groundwater levels are dropping following a prolonged period of settled weather across the Thames catchment.听听
Despite the decline, groundwater levels remain high for the time of year in the Henley and Assendon area of Oxfordshire. A groundwater flood alert is currently in place for this area. This will be removed when levels drop further.聽
Groundwater levels also remain high in the West Berkshire areas of the Lambourn Valley, Leckhampstead, Great Shefford, East and West Illsley, Chilton and West Hagbourne.聽
Consequently, cellars and low-lying land could continue to be impacted. Some fields and gardens could remain waterlogged; roads and footpaths could have puddles on them despite a lack of rainfall. These impacts should reduce over the coming weeks as levels continue to fall.聽
This will be the final briefing note of the 2024 to 2025 recharge season. The Environment Agency will continue to monitor groundwater levels and will issue groundwater flood alerts as/when needed.
Actions and advice
Call Floodline on 0345 988 118 or visit 鈥榗heck-for-flooding鈥� on gov.uk to find out if you can register to receive free Flood Alerts for flooding from groundwater.
You can check current groundwater levels online.
Historic groundwater levels can be checked online on the .
More details can also be found on the monthly Water Situation Report for England.
You can get practical advice on what to do before, during and after groundwater flooding on the gov.uk website.
You can also check the .
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For more information on the flood alert service and to find out what messages you are registered to receive, call Floodline on 0345 988 118.聽
Alternatively, you can contact the following for additional information.听听
Environment Agency (Thames Area) : [email protected]听听
Environment Agency National Customer Contact Centre: 03708 506 506聽
Environment Agency Incident Reporting Hotline: 0800 807060