A Flood Alert was issued for Groundwater flooding in West Ilsley, East Ilsley, Compton, Chilton and West Hagbourne in West Berkshire on 3rd March 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Groundwater Level at Stonor Estate rose 0.23m, peaking at 82.10m, while the Groundwater Level at Chapel Wood climbed 0.15m.
Environment Agency advice issued
Groundwater levels are continuing to rise at our Hodcot borehole affecting West Ilsley, East Ilsley, Compton, Chilton and West Hagbourne where flooding of low-lying areas roads is possible. The groundwater level is higher than normal for this time and flooding is possible. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Residents are advised to prepare property resilience measures and ensure 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 fl
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Stonor Estate | Groundwater Level | +0.23m | 82.10m |
| Chapel Wood | Groundwater Level | +0.15m | 111.47m |
| Water Acre | Groundwater Level | +0.11m | 143.98m |
| Cleeve Lock | River Thames | +0.10m | 2.43m |