HA3: 30 m clear of the highest tide in the London Bridge ledgers

HA3 on the relief of London, with a tide staff: 30 m above the 1953 tide, the highest in the ledgers.

The lowest postcode in HA3, HA3 9UZ, stands 30 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, HA3 6SE, stands 134 m above it.

Ground at eight in ten of its postcodes: between 41 m and 73 m, measured from Ordnance Datum; the middle one stands at 54 m.
None lies in the Environment Agency's Flood Zone 3 from the sea.
Mostly in Harrow; partly in Brent.

Open HA3 on the map