📢 Please take a minute to read this personal message from the creator of River Levels UK
Flooding possible. Be prepared.
Rising groundwater levels may lead to flooding.
Flooding is possible from 10th February 2026.
Groundwater levels are currently rising at our Farringdon borehole near Alton. Groundwater levels are above normal for this time of year. We expect levels to rise over the next few weeks due to sustained rainfall across the area. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer.
We are closely monitoring the situation .
Residents are advised to prepare property resilience measures and ensure that pumps are working where they have been installed .
This message will be updated by 8:00PM on 17 February 2026 or as the situation changes.
Information supplied by the Environment Agency
This information last updated 4:19pm, Tuesday 10th February.
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.