Flood Alert Issued for Denmead, Hampshire Due to High Groundwater Levels

Alert Details

The Environment Agency has issued a flood alert for groundwater flooding in Denmead (Area ID: 065FAG014). The alert was raised following observations of high groundwater levels in the Solent and South Downs region.

Affected Areas

The alert is specifically focused on Denmead in the county of Hampshire. Localized flooding has been reported with water flowing into the road at Anmore Road and Mill Close. Monitoring is currently focused on the borehole levels at Rookwood Farm.

What You Should Do

Residents in the warning area are advised to take the following precautions:

• Prepare property resilience measures to protect against water ingress.
• Ensure that any installed basement or flood pumps are in working order and operational.
• Be aware that high groundwater levels could affect the sewage network, potentially preventing it from operating effectively.

Expected Conditions

Groundwater levels at the Rookwood Farm borehole peaked on Saturday, February 28, 2026, and have since fallen by 25cm. While levels are slowly falling, they remain high. The weather forecast indicates only small amounts of rain are expected from Thursday, March 5, 2026, to Monday, March 9, 2026, which should allow groundwater levels to continue their slow decline throughout the week.

Timeline

The alert was officially issued at 3:00 PM on March 5, 2026. The Environment Agency is closely monitoring the situation and expects to provide an updated message by 6:00 PM on March 12, 2026.