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Flood risk · Mill Hill
Flood risk for Mill Hill
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 lowHigh
0.8%
Medium
0%
Low
0%
Very low
0%
Surface water flooding
Very lowHigh
0.5%
Medium
0.8%
Low
1.1%
Nearest watercourse
Rattlesden River
A river, 426 m from the centre of Mill Hill
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 Mill Hill; 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.