A Flood Warning was issued for Groundwater flooding in the South Wiltshire Downs - The Chilmark in Wiltshire on 3rd March 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Groundwater Level at Windwhistle rose 2.07m, peaking at 76.25m, while the Groundwater Level at Homington climbed 1.74m.
Environment Agency advice issued
High groundwater levels are expected to cause flooding. Groundwater levels in Salisbury Plain are high due to recent rainfall. Areas that could be affected include: areas around the Chilmark stream and South Wiltshire Downs. The groundwater level at The Terraces borehole is at 115.45m, and remains reactive to further rainfall. Residents are advised to prepare property resilience measures and ensure that pumps are working where they have been installed. Residents may experience inundation of septic tanks and sewer systems. Flooding of roads is expected, take particular care when driving, both f
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Windwhistle | Groundwater Level | +2.07m | 76.25m |
| Homington | Groundwater Level | +1.74m | 69.87m |
| Woodyates | Groundwater Level | +1.62m | 101.84m |
| Oakley Industrial Estate | Groundwater Level | +1.07m | 94.20m |
| The Terraces Fonthill | Groundwater Level | +0.99m | 115.87m |
| Stoford Cross | Groundwater Level | +0.91m | 71.04m |
| Chitterne Down | Groundwater Level | +0.70m | 100.33m |
| Ashmore | Groundwater Level | +0.29m | 134.76m |
| Musseldean Copse | Groundwater Level | +0.24m | 135.13m |