E9: no postcode below a spring high tide, the lowest 0.6 m above it

E9 on the relief of London, with a tide staff: Its lowest postcode is 0.6 m above a spring high tide.

No postcode in E9 stands below an ordinary spring high tide at London Bridge. The lowest, E9 5XA, is 0.6 m above it and 0.8 m below the tide of 1 February 1953.

Ground at eight in ten of its postcodes: between 5.8 m and 16 m, measured from Ordnance Datum; the middle one stands at 14 m.
56 of 680 stand lower than the 1953 tide (5.41 m).
84 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
Mostly in Hackney; partly in Tower Hamlets.

Open E9 on the map