Flood risk · Thornby

Flood risk for Thornby

Indicative risk for the kilometre square around the centre, from the Environment Agency’s national flood risk assessment. Always check a specific property address on the official map before buying or building.

River & sea flooding

Very low

No part of the square is in a mapped risk area.

Surface water flooding

Very low

High

0.6%

Medium

0.1%

Low

0.5%

Nearest watercourse

Spratton Brook (Hollowell Arm)

A river, 594 m from the centre of Thornby

For a property-specific flood risk check, use the official Environment Agency service at check-long-term-flood-risk.service.gov.uk.

Environment Agency National Flood Risk Assessment (NaFRA2, January 2025): the level shown is the highest risk that applies to at least 5% of the 1 km square centred on Thornby; bars show each level’s share of that square. Nearest named watercourse from OS Open Rivers. Contains Environment Agency and Ordnance Survey data, Open Government Licence.