📢 Please take a minute to read this personal message from the creator of River Levels UK
Flooding possible. Be prepared.
Groundwater levels are high but continuing to decline at our Farringdon borehole near Alton. Flooding of low-lying areas and roads continues to be possible. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are closely monitoring rainfall and groundwater levels. Residents are advised to ensure property resilience measures are prepared and check that pumps are working where they have been installed. Take particular care when driving through flood water both for your own safety and to prevent flooding to others. This message will be updated by 12:00pm on the 21 April 2026, or as the situation changes.
Information supplied by the Environment Agency
This information last updated 9:44am, Tuesday 14th April.
Communities at risk of groundwater flooding in the Alton, Chawton and Lower Farringdon areas
Region: Thames
Country: England
Counties covered: Hampshire
Watercourses covered: Groundwater
The area bounded in blue on the map shows the area covered by flood alerts and warnings for Groundwater flooding in the Alton area.
Note: the area shown on the map is the area covered by flood alerts and warnings. It is not a live map of current flooding. The area covered broadly equates to the area where the risk of flooding in any year is greater than 1% (the "hundred year" flood risk).
No current or recent warnings.