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Groundwater flooding in the Alton area

Communities at risk of groundwater flooding in the Alton, Chawton and Lower Farringdon areas

Flood alert area Groundwater Hampshire Thames

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Nearby Monitoring Stations

Flood Event History (17)

22 Apr 2026 at 12:09pm Flood Alert
Groundwater levels are now falling steadily. We do not expect further flooding and the flood alert has been removed.  Rivers and streams remain full due to high groundwater levels and will react rapidly to further rainfall.   We will continue to monitor the situation and will issue further alerts o...
21 Apr 2026 at 10:09am Flood Alert
Groundwater levels are high but are declining at our Farringdon borehole near Alton. Flooding of low-lying land and roads continues to be possible. We expect levels to continue to fall over the next few weeks in response to more settled weather. We are closely monitoring rainfall and groundwater l...
21 Apr 2026 at 9:44am Flood Alert
Groundwater levels are high but are declining at our Farringdon borehole near Alton. Flooding of low-lying land and roads continues to be possible. We expect levels to continue to fall over the next few weeks in response to more settled weather. We are closely monitoring rainfall and groundwater l...
14 Apr 2026 at 9:44am Flood Alert
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 gr...
7 Apr 2026 at 12:39pm Flood Alert
Groundwater levels are high but slowly declining at our Farringdon borehole near Alton, therefore 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 a...
31 Mar 2026 at 10:40am Flood Alert
Groundwater levels are high but slowly declining at our Farringdon borehole near Alton and flooding of low-lying areas and roads is possible. Despite the declining trend, we expect levels to remain high over the coming days. Due to the nature of groundwater flooding, this situation could continue fo...
25 Mar 2026 at 2:02pm Flood Alert
Groundwater levels are high but stable at our Farringdon borehole near Alton and flooding of low-lying areas and roads is possible. We expect levels to remain high over the coming days and levels will remain sensitive to further rainfall. Due to the nature of groundwater flooding, this situation cou...
24 Mar 2026 at 8:31am Flood Alert
Groundwater levels are high but stable at our Farringdon borehole near Alton and flooding of low-lying areas and roads is possible. We expect levels to remain high over the coming days and levels will remain sensitive to further rainfall. Due to the nature of groundwater flooding, this situation cou...
17 Mar 2026 at 7:37am Flood Alert
Groundwater levels are high but stable at our Farringdon borehole near Alton and flooding of low-lying areas and roads is possible. We expect levels to remain high over the coming days and levels will remain sensitive to further rainfall. Due to the nature of groundwater flooding, this situation cou...
10 Mar 2026 at 3:14pm Flood Alert
Groundwater levels are high but stable at our Farringdon borehole near Alton, and flooding of low-lying areas and roads is possible. We expect levels to remain high over the coming days and levels will remain sensitive to further rainfall. Due to the nature of groundwater flooding, this situation ...
3 Mar 2026 at 3:43pm Flood Alert
Groundwater levels are high but stable at our Farringdon borehole near Alton and flooding of low-lying areas and roads is possible. We expect levels to remain high over the coming days and levels will remain sensitive to further rainfall. Due to the nature of groundwater flooding, this situation co...
24 Feb 2026 at 6:16pm Flood Alert
Rising groundwater levels may lead to flooding.  Flooding is possible from 24 February 2026.  Groundwater levels are currently rising at our Farringdon borehole near Alton. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by gro...
10 Feb 2026 at 4:19pm Flood Alert
9 Jan 2024 at 7:34pm Flood Alert
14 Feb 2020 at 11:03am Flood Alert
9 Jan 2014 at 10:08am Flood Alert
8 Jan 2013 at 11:05am Flood Alert

Related Flood Areas

Official sources for this area

This area on the Environment Agency’s flood service →
Floodline quick dial: 171909 — call 0345 988 1188 and give that code for a recorded update on this area.
Area code: 061FAG30Alton

Live warnings and area boundaries are the Environment Agency’s and the EA is the authority on them. Contains public sector information licensed under the Open Government Licence v3.0. This area in the EA’s own data.