HA5: 37 m clear of the highest tide in the London Bridge ledgers

HA5 on the relief of London, with a tide staff: 37 m above the 1953 tide, the highest in the ledgers.

The lowest postcode in HA5, HA5 2HU, stands 37 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, HA5 3YD, stands 124 m above it.

Ground at eight in ten of its postcodes: between 48 m and 70 m, measured from Ordnance Datum; the middle one stands at 57 m.
None lies in the Environment Agency's Flood Zone 3 from the sea.
Mostly in Harrow; partly in Hillingdon.

Open HA5 on the map